Dimethylamine biodegradation by mixed culture enriched from drinking water biofilter. (January 2015)

• Record Type: Journal Article
• Authors: Liao, Xiaobin; Chen, Chao; Zhang, Jingxu; Dai, Yu; Zhang, Xiaojian; Xie, Shuguang
• Is Part Of: Chemosphere. Volume 119(2015)
• Page Start: 935
• Page End: 940
• Publication Date: 2015-01
• Subjects: Biofiltration -- Dimethylamine -- Microbial community -- N-nitrosodimethylamine -- Proteobacteria; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2014.09.020
• Languages: English
• ISSNs: 0045-6535

Abstract

Highlights: Carbon and nitrogen sources have different impacts on DMA removal. Carbon and nitrogen sources impact DMA-degrading bacterial community. Proteobacteria predominates in DMA-degrading bacterial community. Abstract: Dimethylamine (DMA) is one of the important precursors of drinking water disinfection by-product N -nitrosodimethylamine (NDMA). Reduction of DMA to minimize the formation of carcinogenic NDMA in drinking water is of practical importance. Biodegradation plays a major role in elimination of DMA pollution in the environment, yet information on DMA removal by drinking water biofilter is still lacking. In this study, microcosms with different treatments were constructed to investigate the potential of DMA removal by a mixed culture enriched from a drinking water biofilter and the effects of carbon and nitrogen sources. DMA could be quickly mineralized by the enrichment culture. Amendment of a carbon source, instead of a nitrogen source, had a profound impact on DMA removal. A shift in bacterial community structure was observed with DMA biodegradation, affected by carbon and nitrogen sources. Proteobacteria was the predominant phylum group in DMA-degrading microcosms. Microorganisms from a variety of bacterial genera might be responsible for the rapid DMA mineralization.