万方污水处理厂的初步.docVIP

HUBEI UNIVERSITY FOR NATIONALITIES 学士学位论文 A城市100000m3/d污水处理厂的初步设计 院 系 化学与环境工程学院 专 业 环境科学 姓 名 吴灵进 学 号 0406314 指导老师 史永红 日 期 2010年5月摘 要 本设计This design is a preliminary design of a process of A urban sewage treatment plant and its construction drawings. The total design processing capacity of sewage is 100000m3/d. Because of the complex water in which its BOD: N: P = 67:11:1, Sewage water, after second biological treatment, its nitrogen and phosphorus is difficult to achieve the prescribed discharge standards, so the nitrogen and phosphorus must be processed simultaneously. According to design requirements and the novelty of ideas, to meet in the removal of BOD, COD and SS, nitrogen and phosphorus removal is also necessary, it was decided to use modern water treatment processes of the more popular A / A / O process plan. The technological process is: Medium-sized grid 棗T he water pump棗eFine grid棗Fnirst sank sand leaking棗rA/A/O biological pool棗/Radiant flow secondary sedimentation pool棗Ddisinfectant pool of contact form. This process comprehend its previous processes, and this process is efficient, energy-saving, and impact-resistant and its load is high, which can get good quality water, it is a kind of deep water treatment processing, thus A/A/O process has extensive applicability. According to many domestic sewage treatment plant operation results, A /A / O process of dealing with the water can usually reach The Peoples Republic of China national standard - Integrated Wastewater Discharge Standard (GB8978-1996) in the level of emissions standards and ensure that the city surrounding agricultural water and river water requirements. Key words: A / A / O process; Municipal living sewage; Secondary sedimentation pool; Sludge treatment; Quality of effluent water 目 录 摘 要 Ⅰ Abstract Ⅱ 1 总 论 1 1.1 项目提出的背景及投资的必要性