【正文】 .....................5 進(jìn)出水水質(zhì) ..................................................................................................................................................6 2 城市污水處理方案的確定 .................................................................................................... 6 確定污水處理方案的原則 .................................................................................................................................6 確定污水處理方案的原則： .....................................................................................................................6 最佳的處理方案要體現(xiàn)以下優(yōu)點(diǎn)： ........................................................................................................6 污水處理方案的確定 .........................................................................................................................................6 A2/O 工藝與改良的 A2/O 工藝 .................................................................................................................7 氧化溝工藝 ..................................................................................................................................................8 設(shè)計(jì)方案的確定 ..........................................................................................................................................9 工藝流程的確定 ............................................................................................................................................... 10 主要構(gòu)筑物的選擇 .......................................................................................................................................... 10 事故溢流閘井 ........................................................................................................................................... 10 格柵 ............................................................................................................................................................ 10 污水泵房 ................................................................................................................................................... 10 沉砂池 ........................................................................................................................................................11 沉淀池（二沉池） ................................................................................................................................... 12 氧化溝 ....................................................................................................................................................... 13 消毒 ............................................................................................................................................................ 14 濃縮池 ....................................................................................................................................................... 15 3 城市污水處理系統(tǒng)的設(shè)計(jì)計(jì)算 .......................................................................................... 15 進(jìn)水閘井和進(jìn)水格柵間的設(shè)計(jì) ...................................................................................................................... 15 污水廠進(jìn)水管 ........................................................................................................................................... 15 進(jìn)水閘井工藝設(shè)計(jì) ................................................................................................................................... 16 格柵的設(shè)計(jì) ............................................................................................................................................... 16 污水泵房的設(shè)計(jì) ............................................................................................................................................... 19 一般規(guī)定 ................................................................................................................................................... 19 水泵設(shè)計(jì)計(jì)算 ........................................................................................................................................... 19 陜西理工學(xué)院畢業(yè)設(shè)計(jì) 第 3 頁 共 41 頁 集水池 ....................................................................................................................................................... 19 泵房附屬設(shè)施及尺寸的確定 .................................................................................................................. 20 細(xì)格柵的設(shè)計(jì)計(jì)算： ...................................................................................................................................... 20 設(shè)計(jì)參數(shù) ................................................................................................................................................... 20 設(shè)計(jì)計(jì)算 ................................................................................................................................................... 20 細(xì)格柵選用 ............................................................................................................................................... 21 皮帶輸送機(jī)選用 ....................................................................................................................................... 22 格柵間尺寸的確定 ................................................................................................................................... 22 旋流沉砂池的設(shè)計(jì) .......................................................................................................................................... 22 設(shè)計(jì)要求 ................................................................................................................................................... 22 設(shè)計(jì)參數(shù) ................................................................................................................................................... 22 設(shè)計(jì)計(jì)算 ................................................................................................................................................... 22 生物選擇器 —— 厭氧池的設(shè)