【正文】 實(shí)測資料可以看出， A 河斷面 COD 及 BOD5高達(dá) (2021年 )，分別超地面水 IV類標(biāo)準(zhǔn) 29倍和 28倍； B河斷面 COD及 BOD5高達(dá) ，分別超地面水 IV類標(biāo)準(zhǔn) 倍和 倍。隨著工業(yè)化及城市化的迅速發(fā)展，該市的水環(huán)境污染問題日趨嚴(yán)重。 According to the designing requirement and thought of looking for novelty: the content of nitrogen is on the high side in this project water quality,so it should be dealed with,while get rid of BOD5 and SS .We adopt and use a kind of craft,which is a paratively extensive denitrification crafts at present, namely, 3 ditch type oxidizing craft. The advantage of this prehensive craft is extensive adaptability , totally suitable for reality originally designed39。 SS≤20mg/L。 NH3N: 40mg/L。 The biochemical oxygen demand of five days(BOD5 ): 200mg/L。 本設(shè)計(jì)采用了三溝式氧化溝主體工藝，工藝流程簡單，省去了初沉池和污泥消化系統(tǒng)，節(jié)省了基建投資和運(yùn)行費(fèi)用，同時(shí)曝氣設(shè)備和構(gòu)造形式多樣，運(yùn)行靈活，管理方便，保證出水達(dá)到污水排放標(biāo)準(zhǔn)，做到了水資源的合理利用。因此 ,更具有廣泛的適應(yīng)性，完全適合本設(shè)計(jì)的實(shí)際要求 。該工藝綜合了以往工藝的優(yōu)點(diǎn)，而且該系統(tǒng)可進(jìn)行硝化，反硝化反應(yīng)，從而達(dá)到生物脫氮的功能。第 1 頁 /共 33 頁 目 錄 摘 要 .................................................................... 1 Abstract ................................................................... 2 1 總論 ..................................................................... 2 ........................................ 3 .................................................... 3 ..................................................... 3 ..................................................... 3 .................................................... 4 ........................................... 4 混合污水水質(zhì)現(xiàn)狀 ......................................... 4 ........................................ 4 ........................................... 4 質(zhì) ..................................... 4 ............................................................ 4 ..................................................... 4 ..................................................... 5 2 污水處理工藝方案比較 ...................................................... 5 ........................................................ 5 ........................................... 5 ................................................... 5 ........................................................ 6 ....................................... 6 ............................................. 6 ........................................................ 9 ..................................................... 9 ..................................................... 9 .................................................... 10 3 污水處理工藝設(shè)計(jì)計(jì)算 ..................................................... 10 ....................................................... 10 ........................................................ 10 ................................................ 11 .................................................. 11 ........................................ 13 .................................................... 13 ...................................................... 13 ...................................................... 13 ...................................................... 16 第 2 頁 /共 33 頁 ................................................ 20 ....................................... 20 ....................................................... 21 ................................................ 21 .................................................. 22 ................................................ 23 ............................................ 24 .................................................. 24 ...................................................... 24 4 污水處理廠總體布置 ...................................................... 24 ......................................................... 24 .............................................. 24 .............................................. 25 ........................................................... 25 ................................................ 25 ................................................ 25 5 土建與公用工程 .......................................................... 26 ........................................................... 26 ........................................................... 26 ........................................................ 26 .............................................. 26 ........................................................ 27 6 投資估算 ................................................................ 27 ................................................. 27 .................................................... 27 .................................................... 27 .................................................... 27 ........................................................... 27 7 勞動(dòng)定員與運(yùn)行費(fèi)用 ...................................................... 28 ........................................................... 28 .................................................... 28 .................................................... 28 .................................................... 28 ........................................................... 29 ............................................ 29 ................................................ 29 總 結(jié) .................................................................... 30 致 謝 .................................................................... 30 參考文獻(xiàn) .................................................................. 30 附錄： .................................................................... 31 第 1 頁 /共 33 頁 某城市污水處理廠初步設(shè)計(jì) 摘 要 本設(shè)計(jì)是 某開發(fā)區(qū)污水處理廠的初步設(shè)計(jì)和施工圖設(shè)計(jì)。該處理廠處理城市污水 ,水質(zhì)較復(fù)雜： 五日生化需氧量（ BOD5）： 200mg/L； 懸浮物（ SS）： 370mg/L； 化學(xué)需氧量（ CODcr）： 450mg/L； NH3N： 15mg/L； 處理后的水質(zhì)要求： BOD5≤ 14mg/L； SS≤ 30mg/L； CODcr≤ 63mg/L； NH3N≤ 3mg/L； 根據(jù)設(shè)計(jì)要求和求新的思想，該污水處理工程進(jìn)水中氮含量均偏高，在去除 BOD5和 SS的同時(shí)，還需要