| Title: | Effect of continuously dosing Cu(II) on pollutant removal and soluble microbial products in a sequencing batch reactor |
| Author(s): | Yan Y; Wang Y; Liu Y; Liu X; Yao C; Ma L; |
| Address: | "Department of Environmental Science and Engineering, Fudan University, 220 Handan Road, Shanghai 200433, China E-mail: liuyan@fudan.edu.cn. College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China" |
| ISSN/ISBN: | 0273-1223 (Print) 0273-1223 (Linking) |
| Abstract: | "The effects of synthetic wastewater that contained 20 mg/L Cu(II) on the removal of organic pollutants in a sequencing batch reactor were investigated. Results of continuous 20 mg/L Cu(II) exposure for 120 days demonstrated that the chemical oxygen demand (COD) removal efficiency decreased to 42% initially, followed by a subsequent gradual recovery, which peaked at 78% by day 97. Effluent volatile fatty acid (VFA) concentration contributed 67 to 89% of the influent COD in the experimental reactor, which indicated that the degradation of the organic substances ceased at the VFA production step. Meanwhile, the varieties of soluble microbial products (SMP) content and main components (protein, polysaccharide, and DNA) were discussed to reveal the response of activated sludge to the toxicity of 20 mg/L Cu(II). The determination of Cu(II) concentrations in extracellular polymeric substances (EPS) and SMP throughout the experiment indicated an inverse relationship between extracellular Cu(II) concentration and COD removal efficiency" |
| Keywords: | "Biological Oxygen Demand Analysis *Bioreactors Copper Sulfate/chemistry/*toxicity Fatty Acids, Volatile/analysis Hazardous Substances/analysis/chemistry Nitrogen Compounds/analysis/chemistry Proteins/analysis Wastewater/analysis/*chemistry Water Pollutant;" |
| Notes: | "MedlineYan, YangWei Wang, YuWen Liu, Yan Liu, Xiang Yao, ChenChao Ma, LuMing eng Research Support, Non-U.S. Gov't England 2015/11/03 Water Sci Technol. 2015; 72(9):1653-61. doi: 10.2166/wst.2015.385" |
