Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1744765 | Journal of Cleaner Production | 2015 | 6 Pages |
Abstract
This study reports the use of an osmotic membrane bioreactor (OMBR) for municipal wastewater treatment. The effects of silver nanoparticles (Ag-NPs) on the system performance were also examined. Using NaCl as the draw solution (DS) (at 49Â g/L), a submerged OMBR system was developed and operated continuously for 108 days. Significant salt accumulation was observed at the beginning of the operation, which resulted in a mild deterioration in biological activity in the bioreactor, where NH4+-N accumulated to around 10.0Â mg/L in the first 15 days. However, the treatment efficiency recovered rapidly as the microbial community acclimatized to the elevated saline environment. Ag-NPs caused a significant decrease in nitrifying efficiency from 98% to 15% and an increase in the extracellular polymeric substances (EPS) content in the activated sludge by 77.8%. A major shift in the bacterial community structure and decrease in community diversity was revealed in 16S rRNA gene based polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) analysis.
Keywords
Related Topics
Physical Sciences and Engineering
Energy
Renewable Energy, Sustainability and the Environment
Authors
Jia-Ming Tan, Guanglei Qiu, Yen-Peng Ting,