【正文】 江水位（黃海 高程）歷年平均： 米，歷年最高（ 1/20）： 米。 該市除 綠保機械廠 、 三環(huán)機械廠 外，還有一些零星工廠企業(yè)。我國北方城市大部分受到資源型缺水的困擾，南方多水地區(qū)由于受到不同程度的污染，已經(jīng)呈現(xiàn)水質(zhì)型缺水趨勢。 and the effluent need reach the GB 89781996,which is BOD5 ≤ 20mg/L, CODcr ≤ 60mg/L, SS ≤20 mg/L, NH3N ≤ 8mg/L,TP ≤ 1 mg/L. The effluent will discharge to Feiyun river. In this design, the carrousel oxidize ditch is used. The main construction includes horizontalflow grit chamber, carrousel oxidation ditches, secondary sedimentation tank and so on. There are many advantages in this system, for example, high efficiency and energy saving as well as anti shock load capacity and a better effluent quality. Key Words: Municipal sewerage。目 錄 摘要 ..........................................................................................................................................................................................I Abstract .................................................................................................................................................................................. II 1 緒論 ..................................................................................................................................................................................... 1 2 設計說明書 .......................................................................................................................................................................... 2 設計依據(jù) ...................................................................................................................................................................... 2 原始資料 ...................................................................................................................................................................... 2 地 理位置與工程背景 ............................................................................................................................................ 2 自然資料 ............................................................................................................................................................... 3 水系 ....................................................................................................................................................................... 3 污水管網(wǎng)設計 ............................................................................................................................................................... 3 排水系統(tǒng)體制的選擇 ............................................................................................................................................ 3 設計流量計算 ........................................................................................................................................................ 3 污水管網(wǎng)定線 ........................................................................................................................................................ 4 污水管網(wǎng)水力計算 ................................................................................................................................................ 5 雨水管網(wǎng)設計 ............................................................................................................................................................... 6 設計流量計算 ........................................................................................................................................................ 6 雨水管網(wǎng)定線 ........................................................................................................................................................ 8 污水處理廠設計 ........................................................................................................................................................... 8 設計水質(zhì) ............................................................................................................................................................... 9 處理程 度的計算 .................................................................................................................................................... 9 工藝流程的確定 ................................................................................................................................................... 10 污水處理構(gòu)筑物設計說明 ................................................................................................................................... 13 污水廠平面布置 .................................................................................................................................................. 18 污水廠的高程布置 ............................................................................................................................................... 19 污水處理廠概算及處理成本 ...................................................................................................................................... 20 計算依據(jù) ............................................................................................................................................................. 20 計算原則 ............................................................................................................................................................. 20 3 設計計算書 ........................................................................................................................................................................ 21 污水管道系統(tǒng) ............................................................................................................................................................. 21 街區(qū)編號并計算其面積 ....................................................................................................................................... 21 劃分設計管段，計算設計流量 ........................................................................................................................... 22 污水管水力計算 ....................................................................