Black water collected from the septic tank treated with a living machine system: HRT effect and microbial community structure
| Autor: | Xiangyong Zheng, Cunhong Lv, Zhang Yejian, Min Zhao, Huang Xianfeng, Bei Ke, Jin Zhan, Hainan Kong |
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| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Environmental Engineering Nitrogen Health Toxicology and Mutagenesis media_common.quotation_subject 030106 microbiology chemistry.chemical_element Septic tank 010501 environmental sciences Waste Disposal Fluid 01 natural sciences Water Purification Bacteria Anaerobic 03 medical and health sciences chemistry.chemical_compound Animal science Environmental Chemistry Ammonium 0105 earth and related environmental sciences media_common Chemical oxygen demand Public Health Environmental and Occupational Health Water General Medicine General Chemistry Pollution Anoxic waters chemistry Wastewater Anammox Anaerobic exercise Water Pollutants Chemical |
| Zdroj: | Chemosphere. 210:745-752 |
| ISSN: | 0045-6535 |
| Popis: | In this study, the performance of a living machine (LM) system was evaluated for use in the treatment of black water collected from septic tanks with hydraulic retention times (HRTs) of 6, 5, and 4 days. We found that the HRT had little effect on the removal efficiency of chemical oxygen demand (COD). However, the removal rates of total nitrogen (TN) and ammonium nitrogen (NH4+-N) decreased with the reduction of HRT, whereas the removal efficiency of total phosphate (TP) was consistently low because of the long sludge retention time. The working conditions of #1 achieved the highest removal efficiency of COD (85%), NH4+-N (75%), and TN (47%), although the removal efficiency of TP (11%) was slightly lower than that of #2 (12%). The microbial communities in each tank of the LM system were characterized by high-throughput sequencing, which showed that the LM system successfully created more favorable conditions for fermentative bacteria than traditional systems, with relative abundances of 13% (#1), 13% (#2), and 15% (#3) compared to that of the anaerobic/anoxic/oxic (A2O) system ( |
| Databáze: | OpenAIRE |
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