50000吨每天生活污水处理工艺设计.doc
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- 50000 每天 生活 污水处理 工艺 设计
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1、摘 要随着经济快速发展和城市化程度越来越高,中心城区和小城镇建设步伐不断加快,城镇生活污水对城区及附近河流的污染也越来越严重。为了改善人民的生活环境,各地政府大力投入资金,力图改变现今水体的水质。本设计要求处理佛山南海区丹灶镇50000吨/天的生活污水。进水水质为BOD5:180mg/L,CODcr:350mg/L, SS:250mg/L, 氨氮:30mg/L,磷酸盐:4mg/L。出水水质达到广东省地方标准水污染物排放限值(DB44/26-2001)二时段一级标准、城镇污水处理厂污染物排放标准(GB18918-2002)B标准的要求。具体出水指标为:BOD520mg/L, CODcr40mg/
2、L,SS:40mg/L,氨氮8mg/L,磷酸盐0.5mg/L。通过研究丹灶镇生活污水的特点,在参照了国内外运用传统氧化沟工艺处理城镇生活污水的成功经验的基础上,本设计采取了较传统氧化沟法更有效的处理工艺卡鲁塞尔2000型氧化沟工艺。该工艺具有污水处理效率高,运行能耗低,生物脱氮除磷效果好的优点。基本工艺流程为:隔栅曝气沉砂池卡鲁塞尔2000氧化沟二沉池消毒池出水。本设计的主要工艺参数为:氧化沟中厌氧池、缺氧池和好氧池的水力停留时间分别是1.2h、1.3 h 和11h,BOD5污泥负荷为0.15 kgBOD5/(kgMLVSSd),剩余污泥含水率 99.2%;二沉池水力停留时间2.0h,表面负荷
3、为1.5m3/(m2h)。主要污染指标全部达到排放标准的要求。工程总占地面积为44550m2,总投资为5909.4万元,每年的总运行费用为1110.8万元,每吨水的运行费用是0.6元/天。关键词:城镇生活污水,氧化沟,脱氮除磷 40AbstractWith the rapid development of economic and high increase of urbanization, the pace of construction of the center city and small town is accelerating. The pollution of municipal
4、 sewage on the city and the nearby river has become an increasingly serious problem. In order to improve peoples living environment, the local governments vigorously invest money, trying to change the current water quality.In this design project, it is required to treat 50000m3/d municipal sewage of
5、 Danzao town in Nanhai District in Foshan City. The quality of the influent water is 180mg/L of the BOD5, 350mg/L of the CODcr, 250mg/L of the SS, 30mg/L of the Ammonia nitrogen, and 4 mg/L of the Phosphate. The quality of the discharged water can meet the Guangdong province emission limits of munic
6、ipal sewage and B emission standard of sewage farm in town. The quality of the effluent water is 20mg/L of the BOD5, 40mg/L of the CODcr, 20mg/L of the SS, 8mg/L of the Ammonia nitrogen and 0.5mg/L of the Phosphate.With the study of the characteristic of municipal sewage in Danzao, and in the light
7、of the successful experience of internal and external use of traditional oxidation ditch process to treat municipal sewage, we select Carrousel 2000 oxidation ditch process that is more effective than the traditional one. Such a process has the advantage of high efficiency and low energy consumption
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