Biodegradation of polyacrylamide by bacteria isolated from activated sludge and oil-contaminated soil

Wen, Quan; Chen, Zhiqiang; Zhao, Yongsheng; Zhang, Huichao; Feng, Yujie

doi:10.1016/j.jhazmat.2009.10.102

Cited by 139 publications

(82 citation statements)

References 22 publications

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“…Microorganisms that can metabolize toxic compounds often become enriched and acclimate to contaminated activated sludge with time (Wu et al 2010;Felfoldi et al 2010;Wen et al 2010). In this study, blast analysis showed that the sequence isolated from Band 19 had high similarity (96%) to Pseudonocardia tetrahydrofuranoxydans K1, which is a THF-degrading strain (Kohlweyer et al 2000).…”

Section: Discussionmentioning

confidence: 82%

The effect of tetrahydrofuran on the enzymatic activity and microbial community in activated sludge from a sequencing batch reactor

et al. 2011

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Tetrahydrofuran (THF) is a toxic and carcinogenic compound that is commonly released from pharmaceutical, chemical and related industry wastewater. Currently, the effects of THF contamination on wastewater are unknown and a better understanding of THF toxicity toward biological processes in wastewater treatment is critical. In this study, we firstly investigated the toxic effects of THF on enzymatic activity and the microbial diversity in activated sludge from a sequencing batch reactor during long-term exposure to 10 mM THF. The activity of five enzymes (catalase, dehydrogenase, urease, phosphatase and protease) was remarkably decreased in the presence of 10 mM THF during a period of 85 days. Of these five affected enzymes, dehydrogenase activity was close to detection level limits and was nearly completely inhibited. Analysis of the microbial community demonstrated that THF, at a concentration of 10 mM, altered the distribution of microbes within the community and significantly decreased microbial diversity during long-term contamination, according to denaturing gradient gel electrophoresis (DGGE) analysis. The fraction of Actinobacteria increased in the community, while the fraction of Proteobacteria significantly decreased after THF exposure.

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Section: Discussionmentioning

confidence: 82%

The effect of tetrahydrofuran on the enzymatic activity and microbial community in activated sludge from a sequencing batch reactor

et al. 2011

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“…The bacterial isolates were identified on the basis of amplifying and sequencing approximately 1400 bp of the 16s ribosomal DNA (rDNA) for bacteria [7,12]. Amplification of the bacteria was performed using the universal primers 27f (5 -AGAGTTTGATCCTGGCTCAG-3 ) and 1492R (5 -AAGGAGGTGATCCAGC CGCA-3 ) [7].…”

Section: General Identification Of Bacterial Isolatesmentioning

confidence: 99%

“…Haveroen et al [6] observed that PAM could be added as a nitrogen source to stimulate methanogenesis in anaerobic environments that are rich in fermentable carbon, but lack nitrogen sources. Recently, Wen et al [7] reported that two strains which were isolated from activated sludge and oilcontaminated soil can use PAM as their sole carbon source. The issue of whether PAM could serve as a main carbon source and/or nitrogen source was still not resolved.…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of partially hydrolyzed polyacrylamide by bacteria isolated from production water after polymer flooding in an oil field

Bao

Chen

et al. 2010

Journal of Hazardous Materials

140

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“…The carbon chain in the PAM is commonly considered recalcitrant and not able to be degraded by the bacteria (Caulfield et al 2002). However, there are a few reports in the literature claiming that the PAM can act as a carbon source for the microbial growth, based on their finds that several pure cultures were capable of growing on the PAM (Nakamiya and Kinoshita 1995;Wen et al 2010;Bao et al 2010). The results presented in this work provided evidence that the bacteria in the BES could utilize the PAM to satisfy their carbon nutritional requirements.…”

Section: Utilization Of Pam As the Nitrogen And Carbon Sourcementioning

confidence: 65%

“…The biological treatment is environmentally preferable than the physical and chemical treatments due to the fact that there is no acrylamide monomer released in the microbial metabolism of PAMs (Nakamiya and Kinoshita 1995;Kay-Shoemake et al 1998a;1998b;Wen et al 2010). However, the large molecular mass and unusual bonds on the carbon chain make the PAMs extremely resistant to the microbial attack (Alexander 1994).…”

Section: Introductionmentioning

confidence: 99%

Bioelectricity-assisted partial degradation of linear polyacrylamide in a bioelectrochemical system

Cui

Zhang

Sun

et al. 2014

Appl Microbiol Biotechnol

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The wide application of water-soluble linear polyacrylamides (PAMs) can cause serious environmental pollution. Biological treatment of PAMs receives very limited efficiency due to their recalcitrance to the microbial degradation. Here, we show the bioelectrochemical system (BES) can be used as an effective strategy to improve the biodegradation efficiency of PAMs. A linear PAM with viscosity-average molecular weight of 5 × 10(6) was treated in the anodic chamber of BES reactor, and the change of PAM structure during the degradation process was investigated. The anodic bacteria in the BES demonstrated abilities to utilize the PAM as the sole carbon and nitrogen source to generate electricity. Both the anode-attached and planktonic bacteria contributed to the electricity generation, while the anode-attached community exhibited stronger electron transfer ability than the planktonic one. The closed-circuit and open-circuit operations of the BES reactor obtained chemical oxygen demand (COD) removal efficiencies of 32.5 and 7.4 %, respectively, implying the generation of bioelectricity could enhance the biodegradation of PAM. Structure analysis suggested the carbon chain of PAM was partially degraded in the BES, producing polymeric products with lower molecular weight. The microbial cleavage of the carbon chain was proposed to start from the "head-to-head" linkages and end with the formation of ether bonds.

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Biodegradation of polyacrylamide by bacteria isolated from activated sludge and oil-contaminated soil

Cited by 139 publications

References 22 publications

The effect of tetrahydrofuran on the enzymatic activity and microbial community in activated sludge from a sequencing batch reactor

The effect of tetrahydrofuran on the enzymatic activity and microbial community in activated sludge from a sequencing batch reactor

Biodegradation of partially hydrolyzed polyacrylamide by bacteria isolated from production water after polymer flooding in an oil field

Bioelectricity-assisted partial degradation of linear polyacrylamide in a bioelectrochemical system

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