【正文】 ological conditions, weather and geographical conditions in Changsha First Sewage Treatment Plant. Given the quantity of this design is200, 000 tons per day, we choose the following process. The first is the physical treatment, the water go though the middle grille, the small grille, and then is upgraded in the pumping station. Followed is the biological treatment, after a series of parison in technical feasibility, economic rationality of the extensive application, science and facilitate in management, we use a viable economic, flexible process named AnaerobicAnoxicOxic . In the plane layout, the former factory districts are in the northeast, while the production areas are in the southwest .For the details, please have a look at the specific flat layout.Keyword: the sewage treatment plant； Changsha； the physical treatment； the biological treatment,；AnaerobicAnoxicOxic武漢工程大學(xué)環(huán)境與城市建設(shè)學(xué)院環(huán)境工程畢業(yè)設(shè)計(jì)III目 錄摘要 ...........................................................................................................................................................................IABSTRACT............................................................................................................................................................II目 錄 ..................................................................................................................................................................III第一章 長(zhǎng)沙市概述 .................................................................................................................................................1 設(shè)計(jì)依據(jù)與設(shè)計(jì)原則 ...................................................................................................................................1 城市概況 .......................................................................................................................................................1 城市排污現(xiàn)狀及污染簡(jiǎn)況 ...........................................................................................................................2 污水處理規(guī)模 ...............................................................................................................................................2第二章 污水處理廠工藝設(shè)計(jì) .................................................................................................................................4 處理廠地理位置 ...........................................................................................................................................4 處理廠設(shè)計(jì)污水量 .......................................................................................................................................5 處理廠污水處理與排放水質(zhì) .......................................................................................................................5 排放污水受納水體 .......................................................................................................................................5 污水處理方案的比較 ...................................................................................................................................5 污水處理工藝流程圖 ...................................................................................................................................8第三章 污水處理工藝與設(shè)備設(shè)計(jì)計(jì)算 ...............................................................................................................10 污水處理系統(tǒng) .............................................................................................................................................10 A2/O 生物反應(yīng)池的設(shè)計(jì) .............................................................................................................................22 鼓風(fēng)機(jī)房 .....................................................................................................................................................35 二沉池集配水井 .........................................................................................................................................36 二沉池 .........................................................................................................................................................36第四章 污泥處理系統(tǒng) ...........................................................................................................................................40 污泥泵房及集配泥井 .................................................................................................................................40 污泥濃縮池 .................................................................................................................................................40 貯泥池 .........................................................................................................................................................42 脫水機(jī)房 .....................................................................................................................................................42第五章 高程計(jì)算 ...................................................................................................................................................44 各構(gòu)筑物的地面高程 .................................................................................................................................44 構(gòu)筑物之間的水頭損失 .............................................................................................................................44 污水高程計(jì)算 .............................................................................................................................................45第六章 總平面布置與工廠運(yùn)輸 ...........................................................................................................................49 總體布置 .....................................................................................................................................................49 高程布置 .....................................................................................................................................................50 工廠運(yùn)輸 ....................