【作者】 叶晓东；

【导师】 朱乐辉；

【作者基本信息】 南昌大学 ， 环境工程， 2010， 硕士

【摘要】 猪场废水属高浓度有机废水,BOD5/COD大于0.4,废水中N、P等营养充足,是适宜进行生化处理的有机废水。本论文以抚州东乡某10000头猪场废水处理工程为研究对象,提出了预沉淀+调节缺氧池+UASB+混凝沉淀+BIOFOR工艺处理猪场废水,通过对反应器的调试启动以及运行特性进行研究,研究结果表明：1.调节缺氧池既起调节作用又起水解酸化和反硝化作用,可有效降解废水中部分抗生素等有毒有害物质,对后续生化处理有利；在正常运行条件下缺氧池对NO3--N平均去除率达到了98.65%。2.UASB反应器采用污泥含水率为80%的脱水厌氧消化污泥接种,污泥接种量为20kgVSS/m3,启动初期采用间歇进水方式逐步提高反应器的容积负荷,UASB反应器处理猪场废水在44d内基本完成启动,在启动过程的动力学研究中,K值在运行第42天可达到目标K0值,K值变化趋势拟合曲线斜率为0.0119。UASB在正常运行条件下对COD平均去除率为80%左右,出水COD浓度在310-900mg／L之间,基质降解动力学模型为v=ds／dt=(13.42QSi／V)／(17.82+QSi／V).3.曝气生物滤池采用自然挂膜方式启动,采用出水回流方式,BIOFOR在正常运行条件下对COD平均去除率为42.9%,氨氮平均去除率为67%,SS平均去除率74.3%。4.采用预沉淀池+调节缺氧池+UASB+混凝沉淀+BAF的组合工艺处理猪场废水,在各反应器正常运行条件下,COD总去除率为97.4%,总出水COD平均浓度为275mg／L；氨氮总平均去除率为82.2%,总出水氨氮平均浓度为73.3mg／L；SS平均去除率为99.3%,总出水SS平均浓度为25.4mg／L,各项出水指标均达到了《畜禽养殖业污染物排放标准》；5.项目直接投资133.4万元,不计折旧运行费用为2.421元／(m3废水),废水在得到有效治理的同时具有良好的环境效益。更多还原

【Abstract】 Swine wastewater is a high concentration organic wastewater, the BOD5/COD≥0.4, which contain ample nutrients such as N、P and so on. The swine wastewater is is very suitable for biological treatment. Base on the 10000 swine wastewater treatment project in Dongxiang Fuzhou city Jiangxi province, A combination of technology of precipitation + anoxic + UASB + coagulation +BIOFOR process was used to treat the wastewater. According to the result of the project start debugging and operating characteristics, the research results were showed as follows:1. Anoxic reactor not only can regulate water quality and quantity, but also have the effection of acidification and denitrification, which have effective degradationantibiotics to toxic substances such as antibiotic. It benefit to latter biochemical treatment. Under normal circumstances, Anoxic reactor had 98.65% average NO3--N removal efficiency.2. Anaerobic digester sludge was used to seed in the UASB reactor. The reactor can start-up in 44days on the condition of 20 kgVSS/mJ seed sludge concentration and using intermittently influent mode. On the dynamics study of startup procedure, K value can reach the target Ko value in 42th days. Under normal circumstances, UASB had 80% average COD removal efficiency, the effluent COD was about 310-900 mg/L. the fitted curve slope of the K trend is 0.0119. The kinetic model is v=ds/dt=(13.42QSi/V)/(17.82+QSi/V).3.BAF start-up by generation biofilm in nature with effluent water backflow, which had 42.9% average COD removal efficiency and 67% NH4+-N removal efficiency and 74.3% SS removal efficiency.4. The effluent COD is 275mg/L, average removal rate achieve 97.4%, The effluent NH3-N is 73.3mg/L, average removal rate achieve 82.2%, The effluent SS is 24.5mg/L, average removal rate achieve 99.3%.The effluent quality can reach the《emission standards of livestock and poultry breeding》5. The project cost about 133.4 million yuan in all. The running cost was about 2.421 yuan per cubic miter without equipment depreciation.it has huge environmental benefits.更多还原