【正文】 氧化溝工藝 6 A2/O工藝 7 工藝流程的選擇 8 污水處理工藝 9 11第3章 主要構(gòu)筑物計(jì)算 13 污水主干管 13 設(shè)計(jì)參數(shù) 13 泵前中格柵 13 污水提升泵房 15 16 沉砂池 18 初沉池 20 A2/O工藝 22 25 28 30 31 32 33 33第4章平面及高程布置 35 35 35 35 36 高程布置原則 36 高程布置的注意事項(xiàng) 36 高程布置方法 37 38 40 41結(jié)　論 42謝 辭 43參考文獻(xiàn) 44外文資料翻譯 45前　言本次畢業(yè)設(shè)計(jì)的課題是河南省靈寶市污水處理廠初步設(shè)計(jì)。該法是20世紀(jì)70年代，由美國(guó)的一些專家在AO法脫氮工藝基礎(chǔ)上開發(fā)的。設(shè)計(jì)說明書：約兩萬字。曝氣工序：當(dāng)污水注滿后即開始曝氣，根據(jù)污水處理的目的，脫氮除磷應(yīng)進(jìn)行相應(yīng)的處理工作。 氧化溝處理系統(tǒng)的構(gòu)造形式較多，有圓形、馬蹄形，平行多渠道形等。圖 2—3 A2/O 工藝流程圖 工藝流程的選擇本設(shè)計(jì)要求處理工藝既能有效地去除BOD、COD、SS等，又能達(dá)到同步脫氮除磷的效果。格柵的主要作用是將污水中的大塊污物攔截，以免其對(duì)后續(xù)處理單元的機(jī)泵或工藝管線造成損害。輻流式沉淀池：池型成圓形或正方形，直徑（或邊長(zhǎng)）660m，用機(jī)械排泥，池底坡度不宜小于 。1. 污泥處理的要求污泥生物處理過程中將產(chǎn)生大量的生物污泥，有機(jī)物含量較高且不穩(wěn)定，易腐化，并含有寄生蟲卵，若不妥善處理和處置，將造成二次污染。洛陽理工學(xué)院畢業(yè)設(shè)計(jì)（論文）第3章 主要構(gòu)筑物計(jì)算 污水主干管污水主干管將城市污水收集后輸送至污水處理廠，本設(shè)計(jì)中污水主干管采用鋼筋混凝土圓管。單位柵渣量ω1=2．設(shè)計(jì)計(jì)算（1）確定格柵前水深，根據(jù)最優(yōu)水力斷面公式計(jì)算得柵前槽寬==,則柵前水深h= B1/2=（2）/(﹚=90設(shè)計(jì)三組格柵，每組格柵間隙數(shù)n=30條（3）柵槽有效寬度B2=s（n1）+en=﹙30－1﹚＋30=，3＋=（）（4）進(jìn)水渠道漸寬部分長(zhǎng)度=(－)／2tan20176。貯砂斗高h(yuǎn)’3＝貯砂斗容積：(V1)沉砂室高度：(h3)采用重力排砂，設(shè)池底坡度i＝％，坡向砂斗，則 l2=l12b22=102=池總高度：(H)核算最小流速最小流量及平均日流量：Q平均日=347 L/S (符合要求)32平流式沉砂池工藝圖 初沉池采用平流式沉淀池沉淀區(qū)的表面積A；表明負(fù)荷取 沉淀部分有效水深h2 取t＝ 沉淀部分有效容積VV==3600=179。每根豎管的供氣量為：曝氣池平面面積為： 每個(gè)空氣擴(kuò)散器的服務(wù)面積按計(jì)，則所需空氣擴(kuò)散器的總數(shù)為：本設(shè)計(jì)采用2200個(gè)空氣擴(kuò)散器。(1) 處理構(gòu)筑物的平面的布置；(2) 附屬構(gòu)筑物的平面的布置；(3) 管道、管路及綠化帶的布置；(4) 具體布置結(jié)果詳見總平面圖，整個(gè)廠區(qū)的平面尺寸為： LB=280m140m為了降低污水廠的運(yùn)行費(fèi)用，污水經(jīng)提升泵站提升至一定水位后，在之后的各構(gòu)筑物間流動(dòng)按重力流考慮。注意排放水位不一定選取水體多年最高水位，因?yàn)槠涑霈F(xiàn)時(shí)間較短，已造成常年水頭浪費(fèi)。污水處理廠污水處理流程高程布置的主要任務(wù)是：確定各處理構(gòu)筑物和泵房的標(biāo)高，確定處理構(gòu)筑物之間連接管渠的尺寸及其標(biāo)高，通過計(jì)算確定各部位的水面標(biāo)高，從而能夠使污水沿處理流程在處理構(gòu)筑物之間通暢地流動(dòng)，保證污水處理廠的正常運(yùn)行。本次設(shè)計(jì)的污水廠廠址所在區(qū)域地勢(shì)較為平緩，~，；。 在處理工藝的比選確定階段，本設(shè)計(jì)主要對(duì)國(guó)內(nèi)目前常用的三種污水處理工藝進(jìn)行了橫向的比較，并根據(jù)該污水處理廠的實(shí)際情況，最終選擇了以A2/O污水處理工藝和以機(jī)械濃縮、機(jī)械脫水為主體的污泥處理工藝。該工藝技術(shù)簡(jiǎn)單，污泥處理的難度較小，在技術(shù)上都是可行的。在此，我再一次衷心的感謝我所有的任課教師。我愛我的大學(xué)，我愛我的老師，我愛我的同學(xué)，雖然大學(xué)即將結(jié)束，我并不感到惆悵，因?yàn)槲以诖髮W(xué)中得到了很多很多的知識(shí)，不僅僅是書本上的，還有更多做人的道理，我感謝我的老師我的同學(xué)我美麗的校園，是你們給予了我快樂，我會(huì)用我的努力，用我的一腔熱血去奮斗，去建設(shè)我們的國(guó)家，為我們美麗的校園增光添彩！也不辜負(fù)老師對(duì)我們厚望。[4]中國(guó)市政工程華北設(shè)計(jì)研究院主編：：中國(guó)建筑工業(yè)出版社，2001[15]，化學(xué)工業(yè)出版社，200257外文資料翻譯Oxidation ditches 1. Introduction Oxidation ditch and continuous circular aeration tank, deformation is one of the activated sludge process. Oxidation ditch sewage treatment technology is successfully developed by the Dutch in the 1950 s and health engineering. Put into use in the Netherlands for the first time since 1954. Due to its good effluent water quality, steady operation, convenient management and other technical characteristics, has been widely used both at home and abroad in domestic sewage and industrial wastewater treatment. The types of the oxidation ditch has been widely applied at present include: pass, oxidation ditch, the Carrousel oxidation ditch, Mr. Bell oxidation ditch, T oxidation ditch, three groove type oxidation ditch, and the integration of DE type oxidation ditch and oxidation ditch. The oxidation ditch because of the differences on the structure and operation, so each has its characteristics. This paper will mainly introduce Carrousel’s structure, the mechanism of the oxidation ditch, the existence question and its latest development. 2. The structure of Carrousel oxidation ditch Carrousel oxidation ditch is DHV Company developed in 1967 by the Dutch. On the basis of the original Carrousel oxidation ditch DHV EIMCO it’s patented in the United States Company and created the Carrousel 2000 System, realizes the higher requirements of biological denitrification and phosphorus removal function. By far the world has more than 850Carrousel oxidation ditch and Carrousel 2000 System is running. Carrousel oxidation ditch with directional control of aeration and agitation device, the mixture transfer horizontal velocity, which was stirring the mixture of circulating in the oxidation ditch channels closed. Oxidation ditch has special hydraulic flow state, therefore, has the characteristics of both the pletely mixed reactor and has the characteristic of push flow reactor, groove exists obvious dissolved oxygen concentration gradient. Oxidation ditch cross section is rectangular or trapezoidal, plane shape is oval, more groove depth is generally ~ m, width depth ratio is 2:1, also have a depth of up to 7 m, ditch water an average speed of m/s. Oxidation ditch aeration mixing equipment have surface aerator, aeration brush or turntable, jet aerator, catheter type aerator and riser type aerator etc., also used underwater driver in recent years. 3. The mechanism of Carrousel oxidation ditch Carrousel oxidation ditch sewage treatment principle The original Carrousel oxidation ditch process with reflux sludge sewage directly into the oxidation ditch System. Dissolved oxygen in surface aerator make mixture the DO concentration increased to about 2 ~ 3 mg/L. Under the condition of the fully mixed oxygen, get enough dissolved oxygen to remove BOD microbial。t effectively remove it pletely, part of the oil concentration in the sludge, turn the brush oxygen filling mixing, produce a large number of bubbles。 Sludge decay is found, should increase air, and clean up mud, hydraulic conditions and try to improve in the pool. And uneven velocity of sludge deposition problem In Carrousel Moseley oxidation ditch, for its unique mixing and processing results, the mixture must be circulating in the groove at a certain velocity. It is generally believed that the minimum flow rate should be m/s, the average velocity of sedimentary does not occur should be ~ m/s. Oxidation ditch aeration equipment generally brush turn for aeration and aeration rotary brush turns the submerged depth of 250 ~ 300 mm, submerged depth of the wheel is 480 ~ 530 mm. With oxidation ditch depth ( ~ m), pared to brush only 1/10 ~ 1/12 of the water depth, turntable also accounts for only 1/6 ~ 1/7, so the oxidation ditch caused by upper flow velocity is larger (about ~ m, or even more), and at the bottom of the flow rate is small (especially in depth below twothirds or 3/4,