污水处理厂中英文摘要.doc

摘 要本次毕业设计的题目为朝阳市凤凰新区污水处理厂工程设计。主要任务是完成该污水处理厂初步设计和单项处理构筑物设计。根据毕业设计的原始资料及设计要求对出水水质的要求：不要求脱氮除磷,出水达到二级排放标准,确定为复合水解池高负荷生物滤池污水处理工艺。朝阳主要气候特点为四季分明，雨热同季，日照充足，日温差较大，降水偏少。全年平均气温5.48.7；年均日照时数28502950小时；年降水量450580毫米；无霜期120155天。春秋两季多风易旱，风力一般23级，冬季盛行西北风，风力较强。朝阳市凤凰新区污水处理厂所要处理废水的规模为Q=30000m3/d，进水的水质为PH=7.1，BOD5=220mg/l，COD=800mg/l，SS=130 mg/l,TN=15 mg/l ,TP=3 mg/l，出水达到二级排放标准。城市污水由工业污水与生活废水组成，其中工业废水量占的较大，污水中主要是可溶性有机物，氮、磷等含量较少，而且有机物的浓度比较高，可生化性较差，在处理时不需要考虑常规的脱氮除磷。根据当地实际情况，以及近年的研究与设计实践，提出了一种适合国内小城镇污水处理的复合水解池-高负荷生物滤池处理技术与工艺。工艺流程为：进水粗格栅细格栅旋流沉砂池复合水解池高负荷生物滤池二沉池出水这对于经济不是十分发达的小城镇地区具有实际意义这主要是由于该工艺的复合水解池和生物滤池在正常运行期间不需曝气，生物接触氧化段仅仅在水质恶劣和冬季水温较低的情况下进行曝气，节省了运行成本，解决了一些地区污水处理厂“建得起，运行不起”的难题。这样可以明显地得到水污染控制，保证公民的正常生活，同时也得到明显的经济效益和社会效益。关键词：朝阳市凤凰新区；复合水解池高负荷生物滤池工艺；可生化性差 AbstractThe graduation project was titled Phoenix, Chaoyang City, New Sewage Treatment Plant. The main task is to complete the preliminary design of the sewage treatment plant and the design of individual treatment tank. According to the original data and the graduation project design requirements on effluent quality requirements: does not require nitrogen and phosphorus removal, effluent discharge standards to achieve two, identified as composite hydrolysis - high load biological filter sewage treatment process.Main climate features of the Chaoyang four seasons, with the same quarter of rain and heat, sunshine, daily temperature greater rainfall. Annual average temperature 5.4 8.7 ; annual average sunshine time 2850 2950 hours; annual rainfall is 450 580 mm; frost-free period 120 to 155 days. Easy to dry windy spring and autumn, the wind usually 2 to 3, the winter prevailing northwest wind, strong wind. Phoenix New District, Chaoyang City, sewage treatment plants to deal with the scale of wastewater Q = 30000m3 / d, influent water quality for the PH = 7.1, BOD5 = 220mg / l, COD = 800mg / l, SS = 130 mg / l, TN = 15 mg / l, TP = 3 mg / l, effluent discharge standards to two. From industrial wastewater and municipal sewage wastewater, of which accounted for a large industrial waste, sewage is mainly soluble organic matter, nitrogen and phosphorus content is relatively small and relatively high concentration of organic matter, poor biodegradability, the processing do not consider conventional nitrogen and phosphorus removal. According to local conditions, as well as research and design practice in recent years, a small town for domestic sewage treatment composite hydrolysis - high load biological filter treatment technology and process.Process: water - coarse grid - Fine Screen - Cyclone grit chamber - composite hydrolysis - high load biological filter - secondary settling tank water.This economy is not highly developed practical significance of small urban areas, mainly due to the process of composite hydrolysis and biological filter during normal operation without aeration, biological oxidation section of poor water quality and winter only in the lower water temperature Aeration circumstances, saving running costs, to solve some of the local sewage treatment plant, building affordable, can not afford to run problem. This can clearly be water pollution control, to ensure the normal life of citizens, but also have signi