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| Impacts of Hydraulic Loading Rate and Air Temperature on Eco-Filter Based Treatment of Greywater Generated in a Rural Household |
| Received:March 31, 2015 |
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| KeyWord:eco-filter;rural household;greywater;hydraulic loading rate;temperature;removal rate |
| Author Name | Affiliation | | CHEN Jian-jun | College of Hydraulic & Environment Engineering, China Three Gorges University, Yichang 443002, China
Institute of Sustainable Utilization on Agricultural Water & Soil Resources, China Three Gorges University, Yichang 443002, China | | XI Yin | College of Hydraulic & Environment Engineering, China Three Gorges University, Yichang 443002, China | | LIAO Zai-yi | College of Hydraulic & Environment Engineering, China Three Gorges University, Yichang 443002, China | | LU Shao-yong | Engineering and Technology Centre of Lake, Dongtinghu Lake Ecological Observation and Research StationDEORS, Research Centre of Lake Environment, State Environmental Protection Key Laboratory for Lake Pollution Control, State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China | | LIU Yao-xing | College of Hydraulic & Environment Engineering, China Three Gorges University, Yichang 443002, China | | HE Jun | College of Hydraulic & Environment Engineering, China Three Gorges University, Yichang 443002, China
Institute of Sustainable Utilization on Agricultural Water & Soil Resources, China Three Gorges University, Yichang 443002, China |
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| Abstract: |
| Treating greywater from rural families has recently caused increasing interests. This study was aimed to investigate the effects of hydraulic loading rate(HLR) and air temperature on treatment efficiencies of greywater generated in a typical rural household. An eco-filter based greywater treatment facility was built in a typical rural house located in the Three Gorges Project area. The levels of CODCr, TN, NH4+-N, TP and turbidity in both influent and effluent were monitored over an entire year. The removal rates of CODCr, TN, NH4+-N, and turbidity(T) in the greywater gradually declined as HLR increased from 0.05 m3·m-2·d-1 to 0.4 m3·m-2·d-1. The removal rate of TP increased at first but decreased subsequently. The optimal efficiency of greywater treatment was observed at 0.2 m3·m-2·d-1 of HLR, which was 75%, 58%, 72%, 50%, and 80% for CODCr, TN, NH4+-N, TP, and T, respectively. The average pH in the effluent was 7.9. The facility demonstrated better performance in the summer than in the winter. However the facility was still good enough for the greywater treatment even in the winter. Of monitored indexes, CODCr was most influenced by air temperature. These results would provide useful information for further studies on the developments of practical technologies and equipment for grey-water treatment in the Three Gorges Project area. |
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