【正文】 1 摘要 我國水體污染主要來自兩方面 ，一是工業(yè)發(fā)展超標(biāo)排放工業(yè)廢水，二是城市化中由于城市污水排放和集中處理設(shè)施嚴(yán)重缺乏，大量生活污水未處理直接進(jìn)入水體造成環(huán)境污染。工業(yè)廢水近年來雖有所減少，但城市生活污水有增無減，占水質(zhì)污染的 51%以上。 本設(shè)計(jì)是要求處理 26000 噸 /天城市生活污水及其污泥的處理工藝，設(shè)計(jì)通過研究城市生活污水的特點(diǎn)及在生活污水處理中取得的成功經(jīng)驗(yàn)，選擇了工藝成熟、穩(wěn)定、節(jié)能和出水水質(zhì)好的厭氧 /缺氧 /好氧活性污泥法（即 A2/O 活性污泥法），使出水水質(zhì)達(dá)到國家《污水綜合排放標(biāo)準(zhǔn)》（ GB8978－ 1996） 中的一級 A 標(biāo)準(zhǔn)。 關(guān)鍵詞： 水體污染 城市生活污水 活性污泥 A2/O 2 Abstract Our major water pollution es from two aspects, one is the industrial development which makes exceed industrial wastewater , the other is urbanization and urban sewage discharge due to serious lack of facilities for central treatment of sewage treatment. Industrial wastewater in recent years is reduced, but the city life sewage has increased, the water pollution has above 51%. In this design project, it is required to treat 26000m3/d municipal sewage。 With the study of the characteristics of municipal sewage and the successful experience of municipal wastewater treatment, we select the AnoxicAnaerobicOxic activated sludge System (That is A2/O activated sludge System ) to treat the municipal sewag. This way is proven to be ripe, stead, effective and good discharged water quality . As a result, the discharged water quality can meet the nationgal“Integrated Wastewater Discharge Standard (GB89781996) in an A standard. Keywords: Water Pollution Municipal Sewage Activated Sludge AnaerobicAnoxicOxic 3 目 錄 1 緒論 .......................................................................................................................................1 一、 污水廠說明書 ...................................................................................................................2 工程概況 ............................................................................................................................ 2 、城市環(huán)境條件概況 .................................................................................................2 、設(shè)計(jì)進(jìn)出水水質(zhì) .....................................................................................................2 、處理 廠處理程度及污水回用要求 ............................................................................3 、設(shè)計(jì)原則 ...............................................................................................................3 污水處理工藝選擇與可行性分析 ......................................................................................... 3 、污水廠的設(shè)計(jì)規(guī)模 .................................................................................................3 、進(jìn)出水水質(zhì) ............................................................................................................4 、處理程度的計(jì)算 .....................................................................................................4 、本工程采用生物脫氮除磷工藝的可行性 ..................................................................4 、工藝比較及確定 .....................................................................................................5 、工藝流程的選擇 .....................................................................................................9 主要構(gòu)筑物介紹 ................................................................................................................. 9 、提升泵站 ............................................................................................................. 10 、旋流式沉砂池 ...................................................................................................... 11 、曝氣池 ................................................................................................................. 11 、輻流式二沉池 ...................................................................................................... 11 、接觸消毒池 .......................................................................................................... 12 、污泥濃縮池 .......................................................................................................... 13 、污水廠平面，高程布置 .................................................................................................. 13 二、 污水廠設(shè)計(jì)計(jì)算書 .......................................................................................................... 15 污水處理構(gòu)筑物計(jì)算 ........................................................................................................ 15 、進(jìn)水控制井計(jì)算 .......................................................................................................... 15 、粗格柵 ........................................................................................................................ 16 、污水提升泵房 ............................................................................................................. 20 、細(xì)格柵 ........................................................................................................................ 21 、沉砂池設(shè)計(jì) ................................................................................................................. 24 、 A2/O 生物反應(yīng)池 ........................................................................................................ 27 、曝氣系統(tǒng) .................................................................................................................... 34 、輻流式二沉池 ............................................................................................................. 40 ...................................................................................................................... 48 （ 1） V型濾池遠(yuǎn)期設(shè)計(jì)流量 ........................................................................................ 48 （ 2） V型槽開孔 .......................................................................................................... 49 （ 3）排水槽 ................................................................................................................. 50 （ 4）濾板計(jì)算 ............................................................................................................. 50 （ 5）進(jìn)出水堰 .........................................................................................................