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The present work focuses on the Microbial degradation of three textile azo dyes, Acid Blue 113(AB113), Acid Black 24(ABK24) and Mordant Black 17 (MB17) by thirteen bacterial isolates as well by their consortia. Thirty five bacterial isolates were isolated from textile dyeing industry effluents. Proficient and rapid dye degradation was identified in thirteen isolates. Microbial consortia were developed...
Imazethapyr is used widely all over the world for the control of broadleaf weeds in the soybean field. However the serious problem of Imazethapyr has been remainded for long time. Bioremediation is an effective and economic method for the soil that has been polluted by pesticides. Used method of bottle cultivating, one strain of Imazethapyr degradable actinomyces S180 was isolated from the soil where...
A bacterium(strain DL-1) capable of growing with 1,2-dichlorobenzene as sole carbon and energy sources was isolated from rhizosphere soil in phragmites wetland by using the enrichment culture contaminated with 1,2-dichlorobenzene concentration gradient of 20, 40, 60, 80, 120, 160 and 200 mg·L-1. It was identified as Bacillus cereus by 16S rDNA gene sequence analysis and the bacterial culture characteristics,...
A strain, Enterobacter sp.S080, was isolated from a lab-scale modified AAO system treating dye-containing wastewater. This strain exhibited a evident color-removal capability when tested against Reactive Black 5under anaerobic condition. More than 85% of Reactive Black 5 was removed within 25h at 50 mg/L dye concentration under anaerobic conditions. Additionally, physiological-biochemical characteristics...
Phenol is an important and common environmental pollutant. In this study, Pseudomonas aeruginosa HS-D38 strain was used to degrade phenol, and the degradation characteristics were investigated. Results indicated that HS-D38 strain could degrade phenol and utilize it as the sole carbon, nitrogen and energy source. UV-visible spectra analysis showed that 300 mgL-1 phenols could be completely degraded...
The degradation dynamics of phenanthrene in soil was studied. The half-life of phenanthrene in the non-sterilized contaminated soil was only 5.1 d, much shorter than the same in the sterilized soil. The dominant strain of phenanthrene microbial degradation was isolated and identified by 16S rDNA as Alcaligenes sp.; its growth and degradative capability were highest at 25°C and pH of 7.0. Inoculation...
Our research focused on the Characteristics of HPAM degradation, using 11 hydrolyzed polyacrylamide degrading bacteria strains that were gained from Daqing field. In this study, we demonstrated that the degradation capability of the mixed strains was stronger than each single one. In addition, Infrared spectrum analysis and Gas Chromatography analysis on HPAM degradation products showed that, parts...
Statistics based experimental designs were used to construct a mixed-culture community for maximal chemical oxygen demand (COD) degradation of pulping effluents. By applying a fractional factorial design (FFD) of experiments, the significant effect of each strain on COD degradation was first quantified. Then steepest ascent method was employed to approach the experimental design space, followed by...
Based on the investigation of eight waste transfer stations in Hangzhou, China, the component of municipal solid waste has been studied. The municipal solid waste is divided into three part, those are incompressible solid material, reinforced material that is difficult to be biodegraded and the material that is easy to be biodegraded. The proportions of these three parts are 35%, 15% and 50%, respectively...
The synergistic effect of microbial consortium S3 (including S3-1, S3-2, S3-3 and S3-4), which has the ability of degrading Polycyclic Aromatic Hydrocarbons was studied by solid phenanthrene as the sole source of carbon and energy. The research showed that only S3-1 had the characteristics of phenanthrene-degrading and other three strains could use the metabolites of S3-1 in different degree. It was...
Polychlorinated biphenyl is a kind of persistent organic pollutants. This experiment screened a halophilic bacterium which could grow at the salinity of 15%, and designated as B2.6. Strain B2.6 could use PCBs as sole carbon and energy source for growth. The optimal conditions of PCBs-degrading were obtained via alteration of pH, inoculation amount and the concentration. The experiment indicated at...
Two newly isolated actinomycetes were identified as streptomyces strain F-6 and F-7. Both of them are possessed of laccase activity. Manganese peroxidase activity of strain F-6 is in very high level(1254.5ul-1).Removal of lignin by F-6, F-7 are more than 50% in 12 days. GC-MS analysis showed strain F-6 could convert lignin into phenol and broken phenol compounds. They may co-culturing with white rot...
Growth condition of p-chloroaniline (p-CA) degrading Bacillus licheniformis named strain ycsd02 which was isolated from rhizosphere soil in phragmites wetland and stored in our labrary was studied. The result showed that the optimal culture temperature, culture pH value and dissolved oxygen for satisfactory cells growth were about 37degC, pH7.2 and 4 mgldrL-1 in LB liquid medium. Growth of strain...
The biodegradation of Daqing crude oil in seawater was studied by petroleum-degrading Zoogloea sp. strain SY1 isolated from soil. The results showed its biodegradation rate was 44.5% without nutrients. SY1 can adapt to NaCl concentration, temperature, pH, and dissolved oxygen in the seawater. Biodegradation rate was improved by appending nitrogen and phosphorus. Phosphorus, pH, NaCl, and nitrogen...
Twenty-eight bacterial strains capable of utilizing the petroleum were isolated from coastal areas along Jiaozhou Bay, Qingdao, China. The biodegradation of diesel and crude oil in seawater by mixed cultures of hydrocarbon-degrading bacteria was investigated. The mixtures or consortia of bacteria, denoted as Consortium 1 and Consortium 2 consisted of 5 bacterial strains, respectively. Consortium 1...
BTEX anaerobic degradation processes is an international focus in the field of groundwater remediation, while systematic research is still unavailable in China. Centering on the screening of highly efficient BTEX degrading bacteria and controlling of the environmental conditions of in-situ repairing site, the study obtained three kinds of mixed flora and three pure strains by establishing the methods...
With the rapid development of the petroleum industry, a large number of oil contaminants leaked into the soil in the petrochemical complex areas, gas stations, automobile factory and other places, which resulted in serious soil and groundwater contamination. Micro-biological degradation of oil pollution is the focus of the present study, while the mechanism of mutual promotion and restriction of restoration...
Lots of dimethoate are applied annually in world with the remainder released to environment has brought terrible contamination. Microorganisms play an important role in the biodegradation of pesticide residues in nature. Two fungal strains with dimethoate degradation capability were isolated and named as F1 and F2 after gradual adaptation and enrichment from soil. The further tests were carried out...
Endoglucanase, exoglucanase and cellobiase activities of ten cellulose degradation isolates from piggery sludge and manure were analyzed. A composite microbial system was constructed by five of these bacteria named as LCB03, LCB12, LCB52, LCD12 and LCD51 with different cellulase activities from these isolates. These five bacteria were identified as Pseudomonas citronellolis, Stenotrophomonas maltophilia,...
A bacterium(strain ycsd03) capable of growing with p-chlorophenol(p-CP) as sole carbon and energy sources was isolated from rhizosphere soil in phragmites wetland by using the enrichment culture contaminated with p-CP concentration gradient of 20, 40, 80, 120, 160 and 200 mgldrL-1. Morphology, physio-biochemical characteristics and phylogenetic analysis based on 16S rDNA sequence indicate that strain...
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