【正文】 ..................................................................................................................... 3 設(shè)計原則 ........................................................................................................................................ 3 設(shè)計范圍 ........................................................................................................................................ 4 城市概況 ................................................................................................................................................ 5 地理位置 ........................................................................................................................................ 5 歷史沿革及城市性質(zhì) ................................................................................................................... 5 自然條件 ........................................................................................................................................ 8 社會經(jīng)濟發(fā)展 ............................................................................................................................. 15 新興區(qū)經(jīng)濟發(fā)展概況 ................................................................................................................. 16 現(xiàn)有排水設(shè)施現(xiàn)狀及存在問題 ......................................................................................................... 19 排水設(shè)施現(xiàn)狀 ............................................................................................................................. 19 存在主要問題 ............................................................................................................................. 20 工程建設(shè)的必要性及可行性 ............................................................................................................. 20 2 工程方案論證 ............................................................................................................................................... 23 排水體制的確定 .................................................................................................................................. 23 現(xiàn)狀排水體制 ............................................................................................................................. 23 排水體制方案論述 ..................................................................................................................... 23 排水系統(tǒng)布局 ...................................................................................................................................... 25 排水管道管材選擇 .............................................................................................................................. 26 規(guī)劃年限 .............................................................................................................................................. 29 工程規(guī)模論證 ...................................................................................................................................... 30 污水量預測 .................................................................................................................................. 30 工程設(shè)計規(guī)模 ............................................................................................................................. 32 污水進出水水質(zhì) .................................................................................................................................. 33 設(shè)計進廠污水水質(zhì) ..................................................................................................................... 33 設(shè)計出水水質(zhì)目標 ..................................................................................................................... 34 污水處理效率 ............................................................................................................................. 35 污水處理廠廠址的選擇 ..................................................................................................................... 35 選址原則 ...................................................................................................................................... 35 廠址方案比選 ............................................................................................................................. 36 污水處理方案論證 .............................................................................................................................. 38 第一方案 A/A/O 工藝 ................................................................................................................ 51 第二方案 CAST工藝 ................................................................................................................. 55 方案比較 ...................................................................................................................................... 61 污泥處理工藝選擇 .............................................................................................................................. 63 消毒工藝選擇 ...................................................................................................................................... 64 ii 污水二次提升泵房工藝選擇 ............................................................................................................. 66 3 污水管線工程設(shè)計 ...................................................................................................................................... 68 設(shè)計依據(jù) .............................................................................................................................................. 68 設(shè)計范圍 .............................................................................................................................................. 68 設(shè)計規(guī)劃年限及設(shè)計規(guī)模 ................................................................................................................. 68 排水管網(wǎng)設(shè)計 ...................................................................................................................................... 68 污水截流干管設(shè)計 .............................