山东建筑大学中水站改造工程实践研究

发布时间：2018-01-16 20:33

本文关键词：山东建筑大学中水站改造工程实践研究　出处：《山东建筑大学》2017年硕士论文　论文类型：学位论文

【摘要】：山东建筑大学2005年新校区建设完成,被联合国环境规划署GreenCampusToolkit项目组邀请为高校绿色校园典型案例,同时山东建筑大学还被评为我国首批“节约型校园建设”示范高校,其中校园中水站的建设为学校节水方面做出了贡献。山东建筑大学中水处理站,占地面积1400平方米,每天处理量在2800m3/d,每年可减少向周围环境排放污水720000m3,直接节约自来水费用达上百万元,同时也减少了学校污水排放对周围环境的影响,保护了学校及周围区域的生态环境,为山东建筑大学绿色校园及节约型校园的建设发挥了重要作用。随着学校招生人数的不断扩大以及建大花园污水的进入,中水站进水水量增多、水质变差,同时中水回用需求量也增多,原中水池容积难以满足目前的需求。校园餐厨垃圾(含碳、氮有机物含量高)拦截效果不佳,后续生物处理超负荷运行,又因中水站设备陈旧,导致中水出水不能达标,出水COD达107 mg/L、BOD5达62.8 mg/L、NH3—N达99.34 mg/L。山东建筑大学中水处理站本次改造为水质、水量的提升,根据本次改造要求并针对中水站的实际情况,设计出了一套切实可行的改造方案。中水站改造前采用厌氧酸化+接触氧化+深度处理工艺,改造后采用倒置A2O+深度处理工艺。设计新增高密度沉淀池为初沉池,去除大颗粒悬浮物,减小后续构筑物的负荷,缩短停留时间,以满足水质水量提升的要求;将水解酸化池改造为厌氧池、选择池改造为缺氧池、生物接触氧化池改造为多级好氧池,将水解酸化池+生物接触氧化池工艺改造为倒置A2O(缺氧池+厌氧池+好氧池)工艺,倒置A2O工艺对有机物、氮、磷有较好的去除效果,且有污泥沉降性好,处理效果好,出水水质稳定等优点;曝气生物滤池(BAF池)进出水方向由下进水上出水改为上进水下出水,有效防止滤头堵塞,保证了过滤及反冲洗效果,鼓风机由75KW更换为45KW,处理水量增加、能耗减小,满足节能需求;改变药剂投加方式和投加量,增加计量泵,保证投药均匀与加药效果。除此之外,对原构筑物进行清淤修缮;更换陈旧的设备和锈蚀的管道,更换的设备包括格栅、水泵、鼓风机、污泥压缩机等;新建配电间并更换配电柜;为防止中水站臭味扩散及中水站整体美观,增加生化池钢制顶盖及彩钢板屋面、增加绿化面积、更换锈蚀构筑物栏杆及走道板。本次中水站改造是在不影响中水站正常运行及中水正常使用的情况下改造完成的,改造完成后,出水水质稳定,出水COD为22.1 mg/L、NH3—N为0.48 mg/L、总余氯1.91mg/L、铁0.1mg/L、锰0.05mg/L,出水满足GB/T18920-2002《城市污水再生利用城市杂用水水质》标准要求。本次工程满足了设计要求,完成了水质及水量的升级改造,设备更换后相比从前更加节能,处理水量增加,减小了中水成本,该项目不仅具有良好的经济效益,且有节能效益及社会环境效益。为类似校园中水站建设工艺的选择及中水站的改造,提供了有益的参考。
[Abstract]:Complete the construction of the new campus of Shandong Jianzhu University in 2005, by the United Nations Environment Programme Project GreenCampusToolkit group invited to college green campus typical case, Shandong Jianzhu University also was named the first batch of China's "construction" conservation oriented campus demonstration University, the construction of campus water station for the school to make a contribution. Shandong Jianzhu University water-saving water treatment station, covers an area of 1400 square meters, daily processing capacity of 2800m3/d, to reduce annual emissions of sewage to the surrounding environment 720000m3, directly save tap water costs millions of dollars, but also reduce the school sewage impact on the surrounding environment, protect the ecological environment of the school and the surrounding area, the construction of the Shandong Jianzhu University green campus and the economical campus has played an important role. With the continuous expansion of enrollment, the school building into the garden of sewage, reclaimed water station The water content increased, poor water quality, and water reuse demand also increased, the original water volume is difficult to meet the current needs. The campus kitchen waste (including carbon, nitrogen and organic matter content) interception effect is poor, the subsequent biological treatment because of overload operation, water station equipment obsolete, leading to water effluent can not be reached, the effluent COD reaches 107 mg/L, BOD5 62.8 mg/L, NH3 - N up to 99.34 mg/L. of reclaimed water treatment station in Shandong Jianzhu University for the transformation of water quality, water content increased, according to the requirements of this project and according to the actual situation of reclaimed water station, designed a set of feasible retrofit scheme. Reclaimed water station before reconstruction by anaerobic acidification and contact oxidation + depth treatment process, using advanced treatment of inverted A2O+ process after transformation. The design of new high density sedimentation tank for primary clarifier, remove large particles of suspended solids, reducing the following structure load, shorten the residence time to meet Water will enhance the requirements; hydrolytic acidification tank into the anaerobic pool, pool selection transformation for the anoxic tank, biological contact oxidation tank into the multi-level aerobic tank, the hydrolytic acidification tank and biological contact oxidation process modification pool for the inverted A2O (anoxic + Anaerobic + aerobic pool pool) process, inverted A2O process of organic matter, nitrogen, phosphorus has a good removal effect, and sludge settleability, good treatment effect, has the advantages of stable water quality; biological aerated filter (BAF filter) out of the water inlet direction from the effluent to the water inlet under water, effectively prevent the filter head plug, the filtration and backwashing effect of air blower by 75KW to replace 45KW, processing capacity increased and reduced energy consumption, to meet the energy demand; change the dosing mode and dosage, increase the metering pump, to ensure uniform dosing and dosing effect. In addition, the original structures for dredging repair; replacement of obsolete equipment Preparation and corrosion of the pipeline, the replacement of equipment including grille, pumps, blowers, compressors and other new distribution of sludge; and replacing the power distribution cabinet; in order to prevent the water station odor diffusion and water station overall appearance, increase the steel roof and the biochemical pool of colored steel roof, increase the green area, the replacement of corroded structures railing and walkway plate. The water station renovation is to complete the transformation does not affect the normal operation of the reclaimed water and reclaimed water station under the condition of normal use, after the transformation is complete, stable water quality of effluent COD was 22.1 mg/L, NH3 N 0.48 mg/L 1.91mg/L 0.1mg/L, total chlorine, iron, manganese 0.05mg/L, GB/T18920-2002< city sewage recycling effluent meet the city complex the water quality standard. > this project can meet the design requirements, completed the upgrading of quality and quantity, equipment replacement than before more energy, processing capacity increased and reduced the cost of water. The project not only has good economic benefits, but also has energy saving benefits and social and environmental benefits. It provides a useful reference for similar Campus Water Conservancy Station construction process selection and reclaimed water station transformation.

【学位授予单位】：山东建筑大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X703

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