Biological treatment of saline domestic wastewater by using a down-flow hanging sponge reactor
| Autor: | La Duc Duong, Nga Thi Dinh, W. Jin Chung, Arvind Kumar Mungray, Soon-Woong Chang, Nguyen-Tri Phuong, Phan Dinh Tuan, T. Hiep Nguyen, Dinh Duc Nguyen |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Environmental Engineering
Nitrogen Health Toxicology and Mutagenesis Sodium 0208 environmental biotechnology chemistry.chemical_element 02 engineering and technology Wastewater 010501 environmental sciences Waste Disposal Fluid 01 natural sciences Bioreactors Bioreactor Environmental Chemistry Organic matter Effluent 0105 earth and related environmental sciences chemistry.chemical_classification Sewage technology industry and agriculture Public Health Environmental and Occupational Health General Medicine General Chemistry equipment and supplies Pulp and paper industry Pollution 020801 environmental engineering Salinity chemistry Volume (thermodynamics) |
| Zdroj: | Chemosphere. 283:131101 |
| ISSN: | 0045-6535 |
| Popis: | In this study, the effect of salinity on the removal of organic matter and nitrogen concentrations in bioreactor was investigated using a hybrid bench scale down-flow hanging sponge (DHS) system for 145 days of operation. The reactor had three identical sections that were filled to 30% volume with Bio-Bact to serve as attached media. The DHS reactor was fed with domestic wastewater that was mixed with increasing concentration of sodium chloride from 0.5 to 3.0% stepwise. The influent and effluent concentrations of BOD5, CODCr, NH4+-N, and TN were analyzed to evaluate the performance of the DHS reactor during the operational period. Results indicate that when salinity was increased from 0.5 to 3.0%, the removal efficiency gradually decreased from 80.3% to 61.5% for CODCr, 76.4%–65.0% for BOD5, 64.1%–48.4% for NH4+-N, and 50%–36% for TN. Besides, the changes in biofilm characteristics with increasing salinity were observed during the operational period. The results indicate that salinity has a significant influence on the removal of organic matters and nitrogen transformation in the biofilm of the bioreactor. Even so, the DHS reactor revealed a good potential for treating saline wastewater. |
| Databáze: | OpenAIRE |
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