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Bioaugmented osteosynthesis:precise monitoring and intervention of the bone healing microenvironment 认领 引用
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作者 Gaoxiang Xu Junyang Chen +3 位作者 Zhikang Xiao Jianzhong Xu Licheng Zhang Peifu Tang 《Bone Research》 SCIE CAS CSCD 2025年第6期1373-1385,共13页
Bone healing is integral to orthopedic research,focusing on the restoration of bone function through a complex interplay of inflammatory responses,soft callus formation,hard callus development,and the final remodeling... Bone healing is integral to orthopedic research,focusing on the restoration of bone function through a complex interplay of inflammatory responses,soft callus formation,hard callus development,and the final remodeling phase.While the natural progression of bone healing is a finely tuned process,it can be disrupted by inflammatory dysregulation,ranging from chronic inflammation to acute inflammatory anomalies,and by the depletion of essential repair substances under both chronic and acute conditions.Current strategies to enhance bone healing employ a multifaceted approach,including biochemical modulation of the local microenvironment through essential nutrient supplementation(e.g.,calcium and vitamin D),biomechanical optimization via improved internal fixation stability,and advanced regenerative techniques incorporating bioactive factors,stem cell therapies,and functional biomaterials.Despite these efforts,challenges persist in the precise characterization of the local microenvironment and the precise control of in vivo bioactive molecule delivery.This review comprehensively summarizes the current research progress in bone healing,providing significant reference for understanding the mechanisms of bone healing and for guiding further research.It is expected to lay the theoretical foundation for the development of more effective therapeutic strategies for bone healing. 展开更多
关键词 osteosynthesis restoration bone function bioaugmentation bone healing microenvironment monitoring inflammatory responsessoft callus depletion essential repair substances inflammatory dysregulationranging
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Performance and microbial community analysis of bioaugmented activated sludge for nitrogen-containing organic pollutants removal 认领 引用 被引量：7
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作者 Xuwang Zhang Zhaojian Song +4 位作者 Qidong Tang Minghuo Wu Hao Zhou Lifen Liu Yuanyuan Qu 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2021年第3期373-381,共9页
Nitrogen-containing organic pollutants(quinoline,pyridine and indole)are widely distributed in coking wastewater,and bioaugmentation with specific microorganisms may enhance the removal of these recalcitrant pollutant... Nitrogen-containing organic pollutants(quinoline,pyridine and indole)are widely distributed in coking wastewater,and bioaugmentation with specific microorganisms may enhance the removal of these recalcitrant pollutants.The bioaugmented system(group B)was constructed through inoculation of two aromatics-degrading bacteria,Comamonas sp.Z1(quinoline degrader)and Acinetobacter sp.JW(indole degrader),into the activated sludge for treatment of quinoline,indole and pyridine,and the non-bioaugmented activated sludge was used as the control(group C).Both groups maintained high efficiencies(>94%)for removal of nitrogen-containing organic pollutants and chemical oxygen demand(COD)during the long-term operation,and group B was highly effective at the starting period and the operation stage fed with raw wastewater.High-throughput sequencing analysis indicated that nitrogen-containing organic pollutants could shape the microbial community structure,and communities of bioaugmented group B were clearly separated from those of non-bioaugmented group C as observed in non-metric multidimensional scaling(NMDS)plot.Although the inoculants did not remain their dominance in group B,bioaugmentation could induce the formation of effective microbial community,and the indigenous microbes might play the key role in removal of nitrogen-containing organic pollutants,including Dokdonella,Comamonas and Pseudoxanthomonas.Phylogenetic Investigation of Communities by Reconstruction of Unobserved States(PICRUSt)analysis suggested that bioaugmentation could facilitate the enrichment of functional genes related to xenobiotics biodegradation and metabolism,probably leading to the improved performance in group B.This study indicated that bioaugmentation could promote the removal of nitrogen-containing organic pollutants,which should be an effective strategy for wastewater treatment. 展开更多
关键词 Bioaugmentation Indigenous microbes Microbial community Nitrogen-containing organic pollutants Wastewater treatment
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Petrochemical wastewater treatment with a pilot-scale bioaugmented biological treatment system 认领 引用 被引量：6
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作者 ZHAO Li-jun MA Fang +1 位作者 GUO Jing-bo ZHAO Qing-liang 《Journal of Zhejiang University-SCIENCE A》 SCIE EI CAS 2007年第11期1831-1838,共8页
In solving the deterioration of biological treatment system treating petrochemical wastewater under low temperatures, bioaugmentation technology was adopted by delivering engineering bacteria into a pilot-scale two-st... In solving the deterioration of biological treatment system treating petrochemical wastewater under low temperatures, bioaugmentation technology was adopted by delivering engineering bacteria into a pilot-scale two-stage anoxic-oxic (A/O) process based on previous lab-scale study. Experimental results showed that when the concentrations of COD and NH4+-N of the influent were 370~910 mg/L and 10~70 mg/L, the corresponding average concentrations of those of effluent were about 80 mg/L and 8 mg/L respectively, which was better than the Level I criteria of the Integrated Wastewater Discharge Standard (GB8978-1996). According to GC-MS analysis of the effluents from both the wastewater treatment plant (WWTP) and the pilot system, there were 68 kinds of persistent organic pollutants in the WWTP effluent, while there were only 32 in that of the pilot system. In addition, the amount of the organics in the effluent of the pilot system reduced by almost 50% compared to that of the WWTP. As a whole, after bioaugmentation, the organic removal efficiency of the wastewater treatment system obviously in- creased. 展开更多
关键词 Bioaugmentation Petrochemical wastewater Pilot-scale study GC/MS
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Anaerobic BTEX degradation in soil bioaugmented with mixed consortia under nitrate reducing conditions 认领 引用 被引量：7
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作者 DOU Junfeng LIU Xiang HU Zhifeng 《Journal of Environmental Sciences》 SCIE EI CAS 2008年第5期585-592,共8页
Different concentrations of BTEX, including benzene, toluene, ethylbenzene, and three xylene isomers, were added into soil samples to investigate the anaerobic degradation potential by the augmented BTEX-adapted conso... Different concentrations of BTEX, including benzene, toluene, ethylbenzene, and three xylene isomers, were added into soil samples to investigate the anaerobic degradation potential by the augmented BTEX-adapted consortia under nitrate reducing conditions. All the BTEX substrates could be anaerobically biodegraded to non-detectable levels within 70 d when the initial concentrations were below 100 mg/kg in soil. Toluene was degraded faster than any other BTEX compounds, and the high-to-low order of degradation rates were toluene 〉 ethylbenzene 〉 m-xylene 〉 o-xylene 〉 benzene 〉 p-xylene. Nitrite was accumulated with nitrate reduction, but the accumulation of nitrite had no inhibitory effect on the degradation of BTEX throughout the whole incubation. Indigenous bacteria in the soil could enhance the BTEX biodegradation ability of the enriched mixed bacteria. When the six BTEX compounds were simultaneously present in soil, there was no apparent inhibitory effect on their degradation with lower initial concentrations. Alternatively, benzene, o-xylene, and p-xylene degradation were inhibited with higher initial concentrations of 300 mg/kg. Higher BTEX biodegradation rates were observed in soil samples with the addition of sodium acetate compared to the presence of a single BTEX substrate, and the hypothesis of primary-substrate stimulation or cometabolic enhancement of BTEX biodegradation seems likely. 展开更多
关键词 benzene toluene ethylbenzene xylene BTEX anaerobic biodegradation nitrate reduction soil bioaugmentation cometabolism
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Assessing quinoline removal performances of an aerobic continuous moving bed biofilm reactor(MBBR) bioaugmented with Pseudomonas citronellolis LV1 认领 引用 被引量：2
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作者 Hu Chen Ying Wang +1 位作者 Puyu Wang Yongkang Lv 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2023年第5期132-140,共9页
This study evaluated the bioaugmentation potential of a quinoline-degrading strain Pseudomonas citronellolis LV1 inoculation into activated sludge for treating quinoline wastewater, and results indicated the inoculati... This study evaluated the bioaugmentation potential of a quinoline-degrading strain Pseudomonas citronellolis LV1 inoculation into activated sludge for treating quinoline wastewater, and results indicated the inoculation of LV1 in aerobic continuous MBBR could substantially improve the quinoline removal performance with an improved removal efficiency of 34% averagely when quinoline was used as the sole carbon and nitrogen source. Additionally, efficient removal of quinoline in enhanced MBBR occurred at the influent p H of 7.0–8.0, hydraulic retention time(HRT) of 24–28 h and influent quinoline concentration of 100–700 mg·L-1. High-throughput sequencing analysis indicated that bioaugmentation could increase microbial diversity and shape the microbial community structure. Although the inoculant LV1 did not remain its dominance in stage Ⅲ, bioaugmentation indeed induced the formation of effective microbial community, and the indigenous microbes including Flavobacterium, Pseudoxanthomonas,Pseudomonas, Vermamoeba, Dyadobacter and Sphingomonas might play the key role in quinoline removal.According to the PICRUSt, the enhanced genes encoding aromatic ring-cleavage enzyme, especially for Nheterocyclic ring-cleavage enzymes, could lead to the improved removal performance of quinoline in bioaugmentation stage. Moreover, the enhanced MBBR treated well actual coking wastewater, as indicated by high removal performance of quinoline, phenol and COD. 展开更多
关键词 Aerobic quinoline degradation Pseudomonas citronellolis LV1 Bioaugmentation Microbial community Coking wastewater
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Technological Feasibility of Biodiesel Production from Bioaugmented Hydrolysate of Waste Sludge in a Municipal Wastewater Treatment Plant 认领 引用
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作者 王怡 赵景婵 +3 位作者 曲鹏程 张百鑫 彭党聪 夏四清 《Transactions of Tianjin University》 EI CAS 2013年第5期332-337,共6页
The hydrolysate of waste sludge was used as the feedstock of biodiesel production,and its technological feasibility was investigated.Waste sludge,collected from No.3 Municipal Wastewater Treatment Plant of Xi’an,was ... The hydrolysate of waste sludge was used as the feedstock of biodiesel production,and its technological feasibility was investigated.Waste sludge,collected from No.3 Municipal Wastewater Treatment Plant of Xi’an,was hydrolyzed in two parallel reactors firstly.Yeast was added into one reactor for bioaugmentation,and the other reactor without yeast was used as a control.Then an acid-catalyzed in situ esterification process was carried out to convert the hydrolysate to biodiesel.The results of hydrolysis showed that the reactor bioaugmented with yeast could promote hydrolysis compared with the control one because of an obvious variance in total suspended solid(TSS),volatile suspended solid(VSS)and soluble chemical oxygen demand(SCOD).Furthermore,gas chromatography(GC)analysis exhibited that the total volatile fatty acid(VFA)was low in the hydrolysate of bioaugmentation reactor;however,its yield of the fatty acid methyl esters(FAMEs)by in situ esterification was obviously higher when compared with the control one.Therefore,it may be inferred that the hydrolysate of bioaugmentation was mainly inclined to longer-chain fatty acid rather than to VFA.Anyway,an FAMEs yield of 9.24%(wt%)from dried sludge was attained after the 12-d bioaugmentation hydrolysis and succedent esterification.This value was not only higher than that of the control one but also higher than that reported in previous literature.The above results illuminated that it was feasible to produce biodiesel from the bioaugmented hydrolysate of waste sludge. 展开更多
关键词 waste sludge hydrolysis bioaugmentation biodiesel production feasibility
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Enhanced Lead Uptake by an Association of Plant and Earthworm Bioaugmented with Bacteria 认领 引用 被引量：3
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作者 anamika das jabez w.osborne 《Pedosphere》 SCIE CAS CSCD 2018年第2期311-322,共12页
Lead(Pb) is recorded as the second most hazardous pollutant of the environment.Previous cases of Pb bioremediation has been reported using single biosystem,but very few reports are available in biological approaches u... Lead(Pb) is recorded as the second most hazardous pollutant of the environment.Previous cases of Pb bioremediation has been reported using single biosystem,but very few reports are available in biological approaches using multi-biosystems to achieve an enhanced bioremoval of Pb.The present study evaluated the capacity of a unique association of Pennisetum purpureum,a hyperaccumulator plant,and Lumbricus terrestris(earthworm)bioaugmented with a Pb-resistant bacterium,obtained from an industrially contaminated site and identified as isolate VITMVCJ1 Klebsiella variicola,to bioremediate Pb.The Pb-resistant gene was amplified in the bacterial isolate VITMVCJ1.The study was conducted for 60 d.Results verified that the bioaugmentation process enhanced1)root and shoot length of the plants,2)chlorophyll content of the plants,and 3)biofilm-producing ability of the microbes from the rhizosphere region of the plants.The total phenolic and flavonoid contents were found to be lower in the plants in the bioaugmented setup.The study also observed a reduction in the toxic effects of Pb on earthworm and plant.The earthworm was used to assess the Pb-induced stress syndrome after exposure to sublethal concentrations of Pb in the soil.A reduction in the content of malondialdehyde,a potential biomarker,on exposure to Pb demonstrated the role of the inoculum to alleviate heavy metal-induced stress in earthworms.All three symbionts accumulated Pb;Pb was accumulated mainly in the root of the plant,and poorly in the shoot of the plant and body mass of the earthworm.The bioaugmentation system exhibited stable and excellent uptake of Pb from the contaminated soils.The results of the present study suggest the positive effect of the synergistic association of the plant and earthworm with appropriate microbes for the bioremoval of Pb. 展开更多
关键词 bioaugmentation bioremediation heavy metal hyperaccumulator Klebsiella variicola Lumbricus terrestris malondi-aldehyde Pennisetum purpureum
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Bioaugmented design and functional evaluation of low damage implantable array electrodes 认领 引用 被引量：3
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作者 Ling Wang Chenrui Zhang +9 位作者 Zhiyan Hao Siqi Yao Luge Bai Joaquim Miguel Oliveira Pan Wang Kun Zhang Chen Zhang Jiankang He Rui L.Reis Dichen Li 《Bioactive Materials》 SCIE CSCD 2025年第5期18-31,共14页
Implantable neural electrodes are key components of brain-computer interfaces(BCI),but the mismatch in mechanical and biological properties between electrode materials and brain tissue can lead to foreign body reactio... Implantable neural electrodes are key components of brain-computer interfaces(BCI),but the mismatch in mechanical and biological properties between electrode materials and brain tissue can lead to foreign body reactions and glial scarring,and subsequently compromise the long-term stability of electrical signal transmission.In this study,we proposed a new concept for the design and bioaugmentation of implantable electrodes(bio-array electrodes)featuring a heterogeneous gradient structure.Different composite polyaniline-gelatin-alginate based conductive hydrogel formulations were developed for electrode surface coating.In addition,the design,materials,and performance of the developed electrode was optimized through a combination of numerical simulations and physio-chemical characterizations.The long-term biological performance of the bio-array electrodes were investigated in vivo using a C57 mouse model.It was found that compared to metal array electrodes,the surface charge of the bio-array electrodes increased by 1.74 times,and the impedance at 1 kHz decreased by 63.17%,with a doubling of the average capacitance.Long-term animal experiments showed that the bio-array electrodes could consistently record 2.5 times more signals than those of the metal array electrodes,and the signal-to-noise ratio based on action potentials was 2.1 times higher.The study investigated the mechanisms of suppressing the scarring effect by the bioaugmented design,revealing reduces brain damage as a result of the interface biocompatibility between the bio-array electrodes and brain tissue,and confirmed the long-term in vivo stability of the bio-array electrodes. 展开更多
关键词 Implantable neural electrodes Bioaugmented design Biocompatibility Scar tissue suppression Signal-to-noise ratio
Salt and ammonia exposure response and bioaugmentation mechanism in anaerobic digestion of food waste 认领 引用
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作者 Qingming He Yongli Liu +4 位作者 Jie Yang Xinxing Gao Wangshui Cai Xuya Peng Lei Li 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第3期742-751,共10页
To investigate the potential and mechanisms of bioaugmentation in overcoming ammonia and salt exposure,this study first examined the performance of food waste anaerobic digestion under two sequential batch experiments... To investigate the potential and mechanisms of bioaugmentation in overcoming ammonia and salt exposure,this study first examined the performance of food waste anaerobic digestion under two sequential batch experiments(R1,R2)exposed to salt(5–15 g/L)and ammonia(3–9 g/L),respectively.R1 and R2 proceed consecutively and under identical operating conditions.Subsequently,domesticated sludge from the highest exposure group was mixed with fresh inoculum(0%-50%ratio)and reintroduced into new systems with 9 g/L ammonia and15 g/L salt exposure to evaluate performance and microbial community responses.The results demonstrated that reactor performance declined with increasing exposure levels in R1.However,under identical exposure levels,R2 consistently outperformed R1,indicating that microbial domestication enhanced reactor resistance to both ammonia and salt exposure within the tested ranges.In bioaugmentation experiments,all test groups exhibited superior digestion performance compared to controls.While salt-exposed groups showed no significant differences across domesticated sludge dosages(p>0.05),ammonia-exposed reactors displayed improved performance with the increasing domesticated sludge ratios.Microbial analysis revealed that sequential exposure enriched 7 salttolerant and 8 ammonia-tolerant genera.However,only a subset of these resilient genera(4/7 in salt-exposed and3/8 in ammonia-exposed groups)successfully colonized the bioaugmented systems.Notably,the introduction of domesticated sludge triggered a“microbiological domino effect”,enriching functionally redundant non-dominant microbes,which likely contributed to the enhancement of digestion performance. 展开更多
关键词 Food waste Anaerobic digestion Salt exposure Ammonia exposure Bioaugmentation
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Enhanced remediation of soil contaminated with selected non-steroidal anti-inflammatory drugs by the bioaugmentation with newly isolated strain Serratia marcescens MC-2/23 认领 引用
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作者 Magdalena Klim Agnieszka Żmijowska Mariusz Cycoń 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第2期231-240,共10页
Excessive use of non-steroidal anti-inflammatory drugs(NSAIDs)has resulted in environmental pollution,including soil contamination.Hence,various methods are required to remove these pollutants.One such approach is bio... Excessive use of non-steroidal anti-inflammatory drugs(NSAIDs)has resulted in environmental pollution,including soil contamination.Hence,various methods are required to remove these pollutants.One such approach is bioaugmentation,which involves introducing microorganisms capable of degrading organic contaminants into different environmental matrices.The novelty of this work relates to the isolation of a new bacterial strain Serratia marcescens MC-2/23,from raw sewage,capable of degrading the most commonly used NSAIDs,i.e.ibuprofen,diclofenac,and naproxen.Moreover,this is the first study wherein bioaugmentation with bacteria has been used for the degradation of NSAIDs in soil.Experiments using a mineral medium supplemented with individual drugs revealed that the MC-2/23 strain utilizes these compounds as carbon and energy sources.The highest degradation rates were observed for ibuprofen and naproxen,with DT50 values of 3.5 and 3.0 days,respectively.Additionally,introducing the MC-2/23 strain into sterile soil confirmed its ability to degrade these drugs.When applied to soil contaminated with the target NSAIDs,the MC-2/23 strain reduced the DT50 values of ibuprofen,diclofenac,and naproxen by 13-,3.1-,and 4-fold,respectively,compared to the soil with natural microflora.These findings suggest that this strain could be effective for the bioremediation of NSAID-contaminated soils.However,the molecular and biochemical aspects of NSAID degradation need to be investigated in depth to elucidate the underlying pathways and accurately assess the survival and competitiveness of the MC-2/23 strain with native microflora to understand its interaction with the soil environment before it can be used in large-scale bioremediation. 展开更多
关键词 Serratia marcescens NSAIDs Bioaugmentation Soil bioremediation
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Bioaugmentation strategies for methane production from digestate-alkali pretreated biomass via anaerobic digestion 认领 引用
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作者 Guangyu Bai Yajing Yin +9 位作者 Zhiqiang Zhang Yan Li Yiyun Liu Ran Wang Zhi-Qiang He Chong Han Rong Zhang Jia-Qi Cui Bing-Zhi Li d He Bai 《Bioresources and Bioprocessing》 SCIE EI CSCD 2025年第1期2456-2468,共13页
Sustainable management of agricultural and livestock wastes remains a major challenge in promoting the circular economy.In this study,a bioaugmentation strategy was applied to enhance methane production during the ana... Sustainable management of agricultural and livestock wastes remains a major challenge in promoting the circular economy.In this study,a bioaugmentation strategy was applied to enhance methane production during the anaerobic digestion of lignocellulosic biomass.Under optimized conditions-including total solids content,pretreatment type,and inoculum source-the biogas yield and methane content reached 425 mL and 3.30%,respectively.Microbial community analysis indicated that Bacteroidota,Firmicutes,and Proteobacteria were the dominant phyla during anaerobic digestion,while the relative abundance of Methanocorpusculum increased steadily throughout the process.The anaerobic digestion performance of corn stover was further improved through the combined application of biostimulation and bioaugmentation,resulting in a methane content of 5.37%.Moreover,exogenous inoculation with genetically modified Trichoderma reesei SEU-7 and the methanogen Methanosarcina barkeri increased the biogas yield and methane content to 970 mL and 8.95%,respectively.Overall,these results demonstrate that rational optimization of anaerobic digestion parameters and microbial consortia can substantially enhance biomass degradation and bioconversion efficiency. 展开更多
关键词 Lignocellulosic biomass Pretreatment Anaerobic digestion Bioaugmentation Methane
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Response and assembly of abundant and rare taxa in Zaopei under different combination patterns of Daqu and pit mud:from microbial ecology to Baijiu brewing microecosystem 认领 引用 被引量：5
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作者 Yu Mu Jun Huang +5 位作者 Rongqing Zhou Suyi Zhang Hui Qin Hanlan Tang Qianglin Pan Huifang Tang 《Food Science and Human Wellness》 SCIE CAS CSCD 2024年第3期1439-1452,共14页
The quality and aroma of strong-flavor Baijiu are mainly dependent on Daqu,pit mud(PM),and the interaction of both.However,little is known about how their combination patterns affect the microbiome and metabolome of Z... The quality and aroma of strong-flavor Baijiu are mainly dependent on Daqu,pit mud(PM),and the interaction of both.However,little is known about how their combination patterns affect the microbiome and metabolome of Zaopei,especially the metabolic function of rare taxa.Here,an experiment on industrial size was designed to assess the effects of 6 combinations(3 kinds of Daqu×2 kinds of PM)on the composition and assembly of different taxa,as well as the flavor profile.The results showed that Zaopei's microbiota was composed of a few abundant taxa and enormous rare taxa,and rare bacterial and abundant fungal subcommunities were significantly affected by combination patterns.The assembly processes of abundantare taxa and bacterial/fungal communities were distinct,and environmental changes mediated the balance between stochastic and deterministic processes in rare bacteria assembly.Furthermore,specific combination patterns improved the flavor quality of Zaopei by enhancing the interspecies interaction,which was closely related to rare taxa,especially rare bacteria.These findings highlighted that rare bacteria might be the keystone in involving community interaction and maintaining metabolic function,which provided a scientific foundation for better understanding and regulating the brewing microbiota from the viewpoint of microbial ecology. 展开更多
关键词 Bioaugmented Daqu Artificial pit mud Abundant and rare taxa Community assembly Metabolic function
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Restoring the plant productivity of heavy metal-contaminated soil using phosphate sludge,marble waste,and beneficial microorganisms 认领 引用 被引量：13
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作者 Anas Raklami Abdel-ilah Tahiri +5 位作者 Noura Bechtaoui ElGharmali Abdelhay Eloisa Pajuelo Marouane Baslam Abdelilah Meddich Khalid Oufdou 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2021年第1期210-221,共12页
Assisted natural remediation(ANR)has been highlighted as a promising,less expensive,and environmentally friendly solution to remediate soil contaminated with heavy metals.We tested the effects of three amendments(10%c... Assisted natural remediation(ANR)has been highlighted as a promising,less expensive,and environmentally friendly solution to remediate soil contaminated with heavy metals.We tested the effects of three amendments(10%compost,C;5 or 15%phosphate sludge,PS5 and PS15;and 5 or 15%marble waste,MW5 and MW15)in combination with microorganism inoculation(rhizobacteria consortium alone,mycorrhizae alone,and the two incombination)on alfalfa in contaminated soil.Plant concentrations of Zn,Cu,and Pb were measured,along with proline and malondialdehyde production.The microbiological and physicochemical properties of the mining soil were evaluated.Application of the amendments allowed germination and promoted growth.Inoculation with the rhizobacteria consortium and/or mycorrhizae stimulated plant growth.PS and MW stimulated the production of proline.Inoculation of alfalfa with the rhizobacteria-mycorrhizae mixture and the application of MW allowed the safe cultivation of the legume,as shown by the low concentrations of metals in plant shoots.Zn and Pb concentrations were below the limits recommended for animal grazing and accumulated essentially in roots.Soil analyses showed the positive effect of the amendments on the soil physicochemical properties.All treatments increased soil p H(around 7),total organic carbon,and assimilable phosphorus content.Notably,an important decrease in soluble heavy metals concentrations was observed.Overall,our findings revealed that the applied treatments reduced the risk of metal-polluted soils limiting plant growth.The ANR has great potential for success in the restoration of polymetallic and acidic mining soils using the interaction between alfalfa,microorganisms,and organomineral amendments. 展开更多
关键词 Bioaugmentation Bioremediation Mine soil Heavy metals Immobilization Rhizostabilization Root microbiome Wastes added-value
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Bioaugmentation with a pyridine-degrading bacterium in a membrane bioreactor treating pharmaceutical wastewater 认领 引用 被引量：10
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作者 Donghui Wen Jing Zhang +2 位作者 Ruilin Xiong Rui Liu Lujun Chen 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2013年第11期2265-2271,共7页
The bacterial strain Paracoccus denitrificans W12, which could utilize pyridine as its sole source of carbon and nitrogen, was added into a membrane bioreactor （MBR） to enhance the treatment of a pharmaceutical wast... The bacterial strain Paracoccus denitrificans W12, which could utilize pyridine as its sole source of carbon and nitrogen, was added into a membrane bioreactor （MBR） to enhance the treatment of a pharmaceutical wastewater. The treatment efliciencies investigated showed that the removal of chemical oxygen demand, total nitrogen, and total phosphorus were similar between bioaugmented and non-bioaugmented MBRs, however, significant removal of pyridine was obtained in the bioaugmented reactor. When the hydraulic retention time was 60 hr and the influent concentration of pyridine was 250-500 mg/L, the mean effluent concentration of pyridine without adding W12 was 57.2 mg/L, while the pyridine was degraded to an average of 10.2 mg/L with addition of W12. The bacterial community structure of activated sludge during the bioaugmented treatment was analyzed using polymerase chain reaction-denaturing gradient gel electrophoresis （PCR-DGGE）. The results showed that the W12 inoculum reversed the decline of microbial community diversity, however, the similarity between bacterial community structure of the original sludge and that of the sludge after bioaugmentation decreased steadily during the wastewater treatment. Sequencing of the DNA recovered from DGGE gel indicated that sp., Sphingobium sp., Comamonas sp., and Hyphomicrobium sp. were the dominant organisms in time sequence in the bacterial community in the bioaugmented MBR. This implied that the bioaugmentation was affected by the adjustment of whole bacterial community structure in the inhospitable environment, rather than being due solely to the degradation performance of the bacterium added. 展开更多
关键词 bioaugmentation pyridine membrane bioreactor denaturing gradient gel electrophoresis pharmaceutical wastewater
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Improved Biodegradation of 1,2,4-Trichlorobenzene by Adapted Microorganisms in Agricultural Soil and in Soil Suspension Cultures 认领 引用 被引量：4
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作者 SONG Yang WANG Fang +4 位作者 F. O. KENGARA BIAN Yong-Rong YANG Xing-Lun LIU Cui-Ying JIANG Xin 《Pedosphere》 SCIE CAS CSCD 2011年第4期423-431,共9页
Inoculating soil with an adapted microbial community is a more effective bioaugmentation approach than inoculation with pure strains in bioremediation.However,information on the potential of different inocula from sit... Inoculating soil with an adapted microbial community is a more effective bioaugmentation approach than inoculation with pure strains in bioremediation.However,information on the potential of different inocula from sites with varying contamination levels and pollution histories in soil remediation is lacking.The objective of the study was to investigate the potential of adapted microorganisms in soil inocula,with different contamination levels and pollution histories,to degrade 1,2,4-trichlorobenzene (1,2,4-TCB).Three different soils from chlorobenzene-contaminated sites were inoculated into agricultural soils and soil suspension cultures spiked with 1,2,4-TCB.The results showed that 36.52% of the initially applied 1,2,4-TCB was present in the non-inoculated soil,whereas about 19.00% of 1,2,4-TCB was present in the agricultural soils inoculated with contaminated soils after 28 days of incubation.The soils inoculated with adapted microbial biomass (in the soil inocula) showed higher respiration and lower 1,2,4-TCB volatilization than the non-inoculated soils,suggesting the existence of 1,2,4-TCB adapted degraders in the contaminated soils used for inoculation.It was further confirmed in the contaminated soil suspension cultures that the concentration of inorganic chloride ions increased continuously over the entire experimental period.Higher contamination of the inocula led not only to higher degradation potential but also to higher residue formation.However,even inocula of low-level contamination were effective in enhancing the degradation of 1,2,4-TCB.Therefore,applying adapted microorganisms in the form of soil inocula,especially with lower contamination levels,could be an effective and environment-friendly strategy for soil remediation. 展开更多
关键词 bioaugmentation chlorobenzenes contaminated soil dechlorination inoculation volatilization
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The start-up of biohydrogen-producing process by bioaugmentation in the EGSB reactor 认领 引用 被引量：5
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作者 王相晶 Ren Nanqi +1 位作者 Xiang Wensheng Guo Wanqian 《High Technology Letters》 EI CAS 2006年第3期328-332,共5页
Expanded granular sludge bed （EGSB） reactor and bioaugmentation were employed to investigate biohydrogen production with molasses wastewater. The start-up experiments consisted of two stages. In the first stage （0 ... Expanded granular sludge bed （EGSB） reactor and bioaugmentation were employed to investigate biohydrogen production with molasses wastewater. The start-up experiments consisted of two stages. In the first stage （0 - 24d） seeded with activated sludge, the butyric acid type-fermentation formed when the initial expanding rate, organic loading rate （OLR）, the initial redox potential （ORP） and hydraulic retention time （HRT） were 10%, 10.0 kg COD/（m^3·d）, -215 mV and 6.7 h, respectively. At the beginning of the second stage on day 25, the novel hydrogen-producing fermentative bacterial strain B49 （AF481148 in EMBL） were inoculated into the reactor under the condition of OLR 16. 0 kg COD/（m^3·d）, ORP and HRT about - 139 mV and 6.7 h, respectively, and then the reaction system transformed to ethanol-type fermentation gradually with the increase in OLR. When OLR, ORP and HRT were about 94.3 kg COD/（m^3·d）, -250 mV and 1.7 h, respectively, the system achieved the maximum hydrogen-producing rate of 282.6 mL H2/L reactor·h and hydrogen percentage of 51% -53% in the biogas. 展开更多
关键词 start-up biohydrogen production bioaugmentation hydrogen-producing bacterial strain B49 EGSB reactor
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Nutrient depletion is the main limiting factor in the crude oil bioaugmentation process 认领 引用 被引量：3
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作者 Yanyu Sun Weiwei Chen +3 位作者 Yibo Wang Jie Guo Haikun Zhang Xiaoke Hu 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2021年第2期317-327,共11页
The biodegradation was considered as the prime mechanism of crude oil degradation.To validate the efficacy and survival of the crude oil-degrading strain in a bioremediation process,the enhanced green fluorescent prot... The biodegradation was considered as the prime mechanism of crude oil degradation.To validate the efficacy and survival of the crude oil-degrading strain in a bioremediation process,the enhanced green fluorescent protein gene(egfp)was introduced into Acinetobacter sp.HC8-3 S.In this study,an oil-contaminated sediment microcosm was conducted to investigate the temporal dynamics of the physicochemical characterization and microbial community in response to bacterium amendment.The introduced strains were able to survive,flourish and degrade crude oil quickly in the early stage of the bioremediation.However,the high abundance cannot be maintained due to the ammonium(NH 4+-N)and phosphorus(PO 4^3--P)contents decreased rapidly after 15 days of remediation.The sediment microbial community changed considerably and reached relatively stable after nutrient depletion.Therefore,the addition of crude oil and degrading cells did not show a long-time impact on the original microbial communities,and sufficient nitrogen and phosphorus nutrients ensures the survive and activity of degrader.Our studies expand the understanding of the crude oil degradative processes,which will help to develop more rational bioremediation strategies. 展开更多
关键词 Crude oil bioaugmentation Bacterial community dynamic shift Enhanced green fluorescent protein
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Improvement Effect of Bioaugmentation with Phenol Degrading Bacteria on Lurgi Coal Gasification Wastewater Treatment 认领 引用 被引量：3
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作者 Fang Fang Gang Wu +1 位作者 Hongjun Han Mingnin Ma 《Journal of Harbin Institute of Technology(New Series)》 CAS 2017年第6期52-59,共8页
The improvement effect of bioaugmentation with phenol degrading bacteria( PDB) on pollutants removal and chemicals consumption was investigated in a full-scale Lurgi coal gasification wastewater( LCGW)treatment plant.... The improvement effect of bioaugmentation with phenol degrading bacteria( PDB) on pollutants removal and chemicals consumption was investigated in a full-scale Lurgi coal gasification wastewater( LCGW)treatment plant. Bioaugmentation with PDB applied in biological contact oxidation tank( BCOT) was carried out in summer to prevent the limitation of low temperature on the bacteria activity. After augmentation,the removal of COD and total phenol(TPh) was significantly enhanced,with efficiencies from 78.5% and 80% to 82.3% and 86.6% in BCOT,respectively. The improvement could also be detected in further processes,including anoxic-oxic,coagulation sedimentation and biological aerated filter,with COD and TPh removal efficiencies increment from 70.1%,24. 7% and 53. 4% to 73. 9%,29. 1% and 55. 9%,from 67. 1%,20% and 25% to 72.5%,25% and 32%, respectively. In addition, chemicals used for denitrification and coagulation sedimentation showed considerable reduction after bioaugmentation,with methanol,coagulant,coagulant aid and bleaching dosage from 100. 0,100. 0,80. 0 and 60. 0 mg/L to 85. 0,70. 6,57. 8 and 45.7 mg/L,respectively. Therefore,bioaugmentation with PDB can be a viable alternative for LCGW treatment plant in pollutants removal and chemicals saving. 展开更多
关键词 bioaugmentation phenol degrading bacteria Lurgi coal gasification wastewater treatment
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Bioaugmentation of DDT-contaminated soil by dissemination of the catabolic plasmid pDOD 认领 引用 被引量：10
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作者 Chunming Gao Xiangxiang Jin +2 位作者 Jingbei Ren Hua Fang Yunlong Yu 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2015年第1期42-50,共9页
A plasmid transfer-mediated bioaugmentation method for the enhancement of dichlorodiphenyltrichloroethane（DDT） degradation in soil was developed using the catabolic plasmid pDOD from Sphingobacterium sp. D-6. The p ... A plasmid transfer-mediated bioaugmentation method for the enhancement of dichlorodiphenyltrichloroethane（DDT） degradation in soil was developed using the catabolic plasmid pDOD from Sphingobacterium sp. D-6. The p DOD plasmid could be transferred to soil bacteria, such as members of Cellulomonas, to form DDT degraders and thus accelerate DDT degradation. The transfer efficiency of pDOD was affected by the donor, temperature,moisture, and soil type. Approximately 50.7% of the DDT in the contaminated field was removed 210 days after the application of Escherichia coli TG I（pDOD-gfp）. The results suggested that seeding p DOD into soil is an effective bioaugmentation method for enhancing the degradation of DDT. 展开更多
关键词 Dichlorodiphenyltrichloroethane Bioaugmentation Plasmid transfer Soil Green fluorescent protein
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Evaluation of water management on arsenic methylation and volatilization in arsenic-contaminated soils strengthened by bioaugmentation and biostimulation 认领 引用 被引量：2
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作者 Peng Chen Yi Liu Guo-Xin Sun 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2024年第3期515-526,共12页
Arsenic(As) fate in paddy fields has been one of the most significant current issues due to the strong As accumulation potential of rice plants under fooded conditions. However,no attempt was done to explore As methyl... Arsenic(As) fate in paddy fields has been one of the most significant current issues due to the strong As accumulation potential of rice plants under fooded conditions. However,no attempt was done to explore As methylation and volatilization under non-fooded conditions. Herein, we investigated the effects of water management on As methylation and volatilization in three arsenic-contaminated soils enhanced by biostimulation with strawderived organic matter and bioaugmentation with genetic engineered Pseudomonas putida KT2440(GE P. putida). Under fooded conditions, the application of biochar(BC), rice straw(RS)and their combination(BC+RS) increased total As in porewater. However, these effects were greatly attenuated under non-fooded conditions. Compared with RS amendment alone, the combination of GE P. putida and RS further promoted the As methylation and volatilization,and the promotion percentage under non-fooded conditions were significantly higher than that under fooded conditions. The combined GE P. putida and RS showed the highest efficiency in As methylation(88 μg/L) and volatilization(415.4 μg/(kg·year)) in the non-fooded soil with moderate As contamination. Finally, stepwise multiple linear regression analysis presented that methylated As, DOC and p H in porewater were the most important factors contributing to As volatilization. Overall, our findings suggest that combination of bioaugmentation with GE P. putida and biostimulation with RS/BC+RS is a potential strategy for bioremediation of arsenic-contaminated soils by enhancing As methylation and volatilization under non-fooded conditions. 展开更多
关键词 Arsenic methylation Arsenic volatilization Water management Straw incorporation Bioaugmentation
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