Study on the treatment of drinking water sources from the Yangtze River by using constructed wetland
首发时间:2008-03-28
Abstract:This study was conducted to reduce ammonia nitrogen (NH3-N) in wastewater effluents by constructed wetland systems under four different influent ammonia nitrogen concentrations. To study the efficiency of ammonia nitrogen (NH3-N) removal through lab scale experiments in Vertical Integrated Constructed Wetland (VICW) systems. Constructed wetland, being simple in construction and maintenance and operation, is a biological system, which applies the interaction between media, plants, wastewater and microorganisms during the degradation of pollutants found in the wastewater. Laboratory scale experimental set-up tank was located at in Hydrology laboratory of Hohai University, Nanjing, China with dimensions of 1.0 m in length, 0.5 m in width and 0.8 m in depth. The media used were sand and rocks. The sand of down-flow tank is 0.7m and the other up-flow is 0.6m. The cattail plants (Typha angustifolia.) were chosen for all reactors of the constructed wetland system. The wastewater from the tank is using pumps to maintain a fixed flow rate at HRT of 1 day, 2 days, 3 days, 4 days and 5 days. The hydraulic retention time (HRT) was about 3 days for the best constructed wetland systems. Influent and effluent were analyzed for NH3-N, COD, TP and TN once every three days. The influent ammonia nitrogen (NH3-N) concentrations for four different concentrations of ammonia nitrogen (NH3-N) experimental runs were ~1.5, 13, 26 and 35 mg/l. Performance of Vertical Integrated Constructed Wetland (VICW) systems were evaluated and compared for different ammonia nitrogen (NH3-N) concentrations in the synthetic wastewater used for this study.
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Study on the treatment of drinking water sources from the Yangtze River by using constructed wetland
摘要:This study was conducted to reduce ammonia nitrogen (NH3-N) in wastewater effluents by constructed wetland systems under four different influent ammonia nitrogen concentrations. To study the efficiency of ammonia nitrogen (NH3-N) removal through lab scale experiments in Vertical Integrated Constructed Wetland (VICW) systems. Constructed wetland, being simple in construction and maintenance and operation, is a biological system, which applies the interaction between media, plants, wastewater and microorganisms during the degradation of pollutants found in the wastewater. Laboratory scale experimental set-up tank was located at in Hydrology laboratory of Hohai University, Nanjing, China with dimensions of 1.0 m in length, 0.5 m in width and 0.8 m in depth. The media used were sand and rocks. The sand of down-flow tank is 0.7m and the other up-flow is 0.6m. The cattail plants (Typha angustifolia.) were chosen for all reactors of the constructed wetland system. The wastewater from the tank is using pumps to maintain a fixed flow rate at HRT of 1 day, 2 days, 3 days, 4 days and 5 days. The hydraulic retention time (HRT) was about 3 days for the best constructed wetland systems. Influent and effluent were analyzed for NH3-N, COD, TP and TN once every three days. The influent ammonia nitrogen (NH3-N) concentrations for four different concentrations of ammonia nitrogen (NH3-N) experimental runs were ~1.5, 13, 26 and 35 mg/l. Performance of Vertical Integrated Constructed Wetland (VICW) systems were evaluated and compared for different ammonia nitrogen (NH3-N) concentrations in the synthetic wastewater used for this study.
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No.1982121190112066****
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Study on the treatment of drinking water sources from the Yangtze River by using constructed wetland
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