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Combined process of sequencing batch reactor activated sludge process and constructed wetland for domestic wastewater treatment

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Journal of Chongqing University 2010年第4期9卷 201-207页

作者：魏武强 Wisaam S. Al-Rekabi Environment Engineering Research and Design Department China Railway Siyuan Survey and Design Group Co. Ltd Key Laboratory of Eco-environments in Three Gorges Reservoir Region Ministry of Education Civil Engineering Department College of Engineering Basra University

By combining sequencing batch reactor (SBR) activated sludge process and constructed wetland (CW), this study is to achieve the domestic wastewater treatment. Our purpose was to determine the optimum operating parameters of the combined process. The process involved advantages and shortages of SBR and CW. Under normal temperature, the 3rd cycle (SBR’s operation cycle is 8 h: inflow for 1 h, limited aeration for 3 h, sediment for 1 h, outflow for 1 h, and idling for 2 h; CW’s hydraulic retention time (HRT) is 24.8 h and hydraulic loading is 24.5 m3/m2 d) was the best cyclic mode. The effluents can meet the standard GB/T18921-2002: "The reuse of urban recycling water: water quality standard for scenic environment use". In the 3rd cycle, the efficiency of CW was the maximum, and energy consumption of SBR was the minimum. Under the condition of low dissolved oxygen, the removing efficiency of chemical oxygen demand (COD) and ammonia was not affected obviously. Simultaneously, nitrification and denitrification phenomena occured and phosphorus was absorbed obviously.

关键词： sequencing batch reactor activated sludge process constructed wetland energy consumption low dissolved oxygen

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HM-SBR a Technology in Wastewater Treatment

HM-SBR a Technology in Wastewater Treatment

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The Second Asian and Oceanic Congress for Radiation Protection

作者： Wang Xuewen Gao Zenglin Wang Zhiheng Deng Guozheng Wei Zhikang Zhao Zhongyan Zhang Huifen(China Institute for Radiation Protection Taiyuan 030006)

Resorting to the high-effective microorganism（HM）and referring to the normal sequencing batch reactor activated sludge process（SBR technology）,this thesis will introduce HM-SBR reactor and will focus on its process of the cultivation and adaptation of the sludge as well as different functions and effects of the sewage treatment under the reactors different running modes,The test result showed that during the cultivation and adaptation of sludge,the HM-SBR has got a obviously higher CODcr wiping-off ratio with the average increase of 6.2% than the normal SBR group,and the sludge stabilization phase comes one day earlier in the former group,Under the higher loading of taking water,compared with the normal SBR group,HM-SBR group has the favorable functioning under the five different running ***-SBR has average amplitude of 5.4% in ***-off ratio comparison and 18.45% for NH3-N wiping-off.

关键词： high-effective microorganism sequencing batch reactor activated sludge process HM-SBR reactor

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Campus Sewage Treatment System Based on Program Logic Control Technology

Campus Sewage Treatment System Based on Program Logic Contro...

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第24届中国控制与决策会议

作者： JIANG Jing 1,2 , ZHANG Xuesong 3 1. North China Institute of Science and Technology, Beijing 101601, China2. China University of Mining and Technology, Beijing 100083, China 3. National Laboratory of Electro-Optics System Technology, Hebei 065201, China

Sewage from our campus was needed to treat urgently due the affect of sewage on the environment becoming more and more seriously. This paper proposes a method of sequencing batch reactor activated sludge process to meet the needs of campus. Therefore, the method is so complicated that only automatic control part was realized. Strengths of sequencing batch reactor activated sludge process were played. PLC controller from Mitsubishi FX2N Series was used in the automatic control system of sewage treatment with stable operation, low cost, good effect and so on.

关键词： Sewage treatment sequencing batch reactor activated sludge process Program logic control

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