【正文】 ble mixer, return sludge and sewage tank in contact with mixed reactions, can achieve part of the role of phosphorus, and improve the properties of the activated sludge, but also the separation of both aerobic and anaerobic bacteria flow 1250m3 / h, pool effective volume 3925 m3 / h.(7)Orbal oxidation ditch Aubert oxidation ditch, it is elliptical reinforced concrete pool, divided into pool is divided into three annular channel, turn sewage into the outer channel, the channel and inside the channel, and finally by the center of the island and into the sedimentation tank with water flow 1250m3 / h, every seat effective volume 11000m3, the mixture concentration g / l, the design depth of , HRT and oxidation ditch is a core part of the entire processing system, its main function is to make the cultivation of domesticated activated sludge degradation, adsorption, aggregation of organic matter, and through the action of bacteria so that the suspended particles and dissolved particles tend to precipitate, resorted to water The organic content is seat is installed oxidation ditch aeration plate spinning disc 10 sets, outside the channel dissolved oxygen control in / l, in the meantime oxidation, nitrification and intermediate channel and an outer channel dissolved oxygen controlled at 1mg / l and 2mg / l, of organic matter in sewage further oxidation, to ensure the organic content of the effluent to meet the design requirements.(8)sedimentation Water will be discharged into the oxidation ditch treatment after sedimentation tanks, sedimentation tanks using radial flow sedimentation tank, water center, surrounded by water, the diameter D = 38m, a total of with wells located two blocks, through contact with sewage into the pool after seat settling ponds located around the drive fullbridge scraping suction machine, sedimentation tank sludge and sludge pumping station to flow 1813m3 / h, maximum surface load m3 / , singlecell pool depth of 4m, the residence time of .(9)contact tank To ensure the cleanliness of the water due to the standards required to be disinfected so, it set up contact with the cell holder 1: 1813 m3 / h flow rate, contact time 30min, effective contact volume 1056 m3, the effective depth of project uses chlorine dioxide disinfection, contact tank responsible for wastewater effluent dosing point sewage pond in the front reflux 1813 m3 / h, the average amount of chlorine 8 mg / l, a single effective yield chlorine / h.(10)reflux and sludge pumping station As part of the water will precipitate some sludge, so the return sludge pump submersible pump, to enhance the use of sludge submersible centrifugal pumps, construction simple and pact sludge volume 1250 m3 / h, the sludge moisture content %.(11)between chlorination This project uses chlorine dioxide disinfection, contact tank responsible for wastewater effluent dosing point sewage pond in the front reflux 1813 m3 / h, the average amount of chlorine 8 mg / l, a single effective yield chlorine / , the significance of the sewage treatment With the development of urban water shortages increasing pressure to pursue the root causes of urban water crisis, it is increasingly recognized that munity water cycle beyond the natural cycle of water can carry a , only full respect for the natural movement of water, the rational use of water resources, making water recycling upstream region does not affect the function of water downstream waters, without prejudice to the objective laws of social cycle natural circulation, thereby maintaining or restoring good water environment and the watershed of the city, The effective way is the sustainable use of water resources which requires us from “wateruser” into open water unidirectional mode is “sparingly wateruserrecycled water” feedback circulation processes, improve water use this major shift patterns of water use and enhance wastewater reuse is the the advancement of science and technology, urban sewage is no longer a waste, but a valuable is a resource, it is necessary to maximize the urban sewage recycling rate, one can reduce pollutant emissions, and second, to save the limited water Division of Water Resources Deputy Director Xiaoice from Tsinghua Speaking on the university and China Water Network39。水是不可缺少的一部分，是人類生存的必要條件。在這次調(diào)查中我遇到很多困難，但是我都努力克服了。，建設(shè)多元融資平臺(tái)以解決污水處理廠資金問(wèn)題。（四）城鎮(zhèn)污水處理設(shè)施的建設(shè)資金缺口較大。（三）人們環(huán)保意識(shí)差，不懂得資源保護(hù)與可持續(xù)性發(fā)展的關(guān)系，缺乏遏制環(huán)境污染的主觀能動(dòng)性，對(duì)環(huán)境“臟、亂、差”現(xiàn)象習(xí)以為常，熟視無(wú)睹。（10）回流及剩余污泥泵房由于部分水會(huì)沉淀出一些污泥，所以回流污泥泵采用潛水軸流泵，剩余污泥的提升采用潛水離心泵，土建結(jié)構(gòu)簡(jiǎn)單緊湊。中間溝道及外溝道溶解氧分別控制在1mg/l和2mg/l，對(duì)污水中的有機(jī)物進(jìn)一步氧化，保證出水中的有機(jī)物含量達(dá)到設(shè)計(jì)要求。（5）計(jì)量設(shè)備沉砂池后有許多儀表，在沉砂池后設(shè)置電磁流量計(jì)，可以對(duì)進(jìn)廠污水流量進(jìn)行連續(xù)監(jiān)測(cè)，同時(shí)設(shè)置水質(zhì)監(jiān)測(cè)儀表，如PH計(jì)、溫度計(jì)、SS計(jì)，把測(cè)量信號(hào)傳至中央控制室，防止任何紕漏的出現(xiàn)。一、污水處理工業(yè)流程（1）粗格柵間粗格柵設(shè)在進(jìn)水泵房之前，以去除進(jìn)廠污水中顆粒較大的雜質(zhì)，使進(jìn)水泵安全穩(wěn)定運(yùn)行。過(guò)去的幾年，宣化區(qū)在污水處理方面做了大量的工作，取得了一些成效。2004年經(jīng)國(guó)家發(fā)展和改革委員會(huì)辦公廳批復(fù)建設(shè)，計(jì)劃總投資6316萬(wàn)元。將初步處理后的污水抽入細(xì)格柵間。（7）奧貝爾氧化溝 奧貝爾氧化溝，它為橢圓形鋼筋混凝土池，分為2座