文档介绍：摘要
伴随着中国城市化进程的加快,中国必须提高环保意识,逐步扭转社会发展进步与保护环境之间的矛盾,努力构建社会主义和谐社会。
现有辽宁省大连地区A城市为扭转城市发展与环境污染之间的矛盾,改善居民生活环境,提高城市形象,改善投资环境,需要设计一套城市排水系统,将城市生活污水与工业废水集中至污水厂处理。
经过对该市污水水质水量以及相应的出水标准的分析,采用SBR工艺对污水进行生化处理,可以同步实现去除BOD、脱氮、除磷。,,处理后悬浮物浓度和BOD5浓度达到《污水综合排放标准》,均小于10mg/L。污水处理过程包括:污水总泵站——格栅——沉砂池——初沉池——SBR生化池——消毒接触池——巴氏计量槽。污泥处理过程包括:浓缩池——贮泥池——消化池——脱水间。由于在浓缩池、贮泥池、消化池中污泥的停留时间过长,上清液中含有大量的磷,故而需要将上清液加以处理。处理后的上清液回流至泵站,产生的泥渣作为生活垃圾卫生填埋或则用作农用肥。
关键字污水处理;SBR;脱氮;除磷
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Abstract
Coupled with the acceleration of Chinese urbanization, China must advances environmental consciousness and gradually resolves the contradiction between environment protection and social development so as to build socialistic concordant society.
Now, a city in Liao Ning Province need a municipal drainage system to collect sewage and industrial effluent together and treat it to meet the goal of fabricate urban image, ameliorate investment environment. Considering waste water’s actual condition and the discharge standard, SBR is chosen as the most favorable technique. The concentration of suspended solids is , and the concentration of BOD5 is . After disposing, the concentration of SS and BOD5 are both less than 10mg/L and accord with Integrated Wastewater Discharge Standard. Sewage treatment process include: Pumping Station —— Grill —— Preliminary Sedimentation Tank —— Sequencing Batch Reactor —— Disinfection Tank ——Parshall flume. Sludge process include: Sludge Thickener —— Sludge bulking —— Sludge Digestion Tank —— Sludge Dewatering Station. As the sludge stayed too long in Sludge Thickener、Sludge bulking and Sludge Digestion Tank, the supernatant containing a lot of phosphorus, supernatant therefore need to be disposed. After disposing, supernatant return to Pumping Station, and the sludge as a solid waste sanitary landfill, or is used as a farm fertilizer.
Keywords wastewater treatment;SBR;nitrogen removal;dephosphorization
目录
摘要 I
Abstract II
第1章