【正文】 摘 要 I 摘 要 隨著我國社會經(jīng)濟的不斷發(fā)展，城市化水平的逐步提高，環(huán)境保護措施的落實，以及市場經(jīng)濟的建立，排水事業(yè)作為城市的重要基礎設施這一，也得到了蓬勃的發(fā)展。全國大多的城市都對老城區(qū)的給排水管網(wǎng)進行了改造，并且還興建了一大批污水處理廠對城市的生活污水，工業(yè)廢水進行處理。 本設計是對南京市建鄴區(qū)某一排水工程設計。其設計范圍包括：雨水管網(wǎng)工程、污水管網(wǎng)工程和污水處理廠工程。本次設計均采用了國家最新的有關規(guī)定、標準、和設計規(guī)范。 管網(wǎng)的體制采用的是分流制。 污水處理廠設計規(guī)模近期 40000 m3/d，遠期60000m3/d，故本設計按近期設計 ,遠期規(guī)劃。污水廠二級處理出水排至河流下游。 污水處理廠處理流程為：污水→中格柵→提升泵房→細格柵→鐘式沉砂池→氧化溝→二沉池→紫外消毒→出水。 污泥流程：剩余活性污泥→污泥提升泵房→濃縮脫水一化車間 →污泥外運。 本污水處理廠占地約為 公頃。 關鍵詞： 污水管網(wǎng) 雨水管網(wǎng) 氧化溝 濃縮脫水一體化設備 南京林業(yè)大學南方學院畢業(yè)論文 II Process design of 40000t/d city sewage treatment plant Astract With the develop of our country society economy continuously, Vitalization is gradually increasing, Environmental protection measure of practical, and with establishing of the Market economy, Draining, As one of the important foundation facilities, also got a fast development. The city in the whole nation almost reform drainpipe . And still built the dirty water of large quantity disposal the factory to discard the water to proceed to handle to city. This project is for designing sewerage engineering of Nanjing city Jianye District. The design includes stremwater drainage system and wastewater collecting system and sewage works . And this design all adopted national latest relevant provision, Standard, with design the norm. The system of pipe adopts is the bridging system . Sewage treatment plant design scale now is 40000m3/d, in the future date is 60000m3/d . The rainfall is all putd in order into San Ming River and the handled sewage from the sewage plant put into River. The sewage treatment plant handle the distance travelled by a stream of water being : Sewage→ Coarse screens→ Sewage elevated pumb house→ Fine screens→ rotated Grit chamber→ Oxidation ditch → Secondary sedimentation tank → UV Sterilize in pool→ River. Sludge distance travelled by a stream of water : Remainder sludge→ sludge elevated house → the concentration and dehydration workshop→ Transport outside the sludge Covers an area of and act as hectares around in this the sewage treatment plant . Keywords: solid pipe rainwater tule Sewage treatment plant Oxidation ditch the concentration and dehydration workshop 目 錄 III 目 錄 摘 要 .....................................................................................................................I Astract ................................................................................................................... II 第一章 緒論 .......................................................................................................... 1 設計原則及目的 ..................................................................................... 1 設計原則 ...................................................................................... 1 設計目的 ...................................................................................... 2 城市概況及自然條件 ............................................................................. 2 城市概況 ...................................................................................... 2 自然條件 ...................................................................................... 2 城市供水及排水工程現(xiàn)狀 ..................................................................... 3 排水工程規(guī)劃原則 ................................................................................. 3 設計指導思想及意義 .............................................................................. 3 第二章 方案論證 .................................................................................................. 5 污水量及水質論證 ................................................................................. 5 設計年限 ...................................................................................... 5 污水量預測 .................................................................................. 5 污水進出水水質 .......................................................................... 7 處理程度 ...................................................................................... 8 排水系統(tǒng)方案論證 ................................................................................. 8 排水體制的選擇 .......................................................................... 8 設計原則 ...................................................................................... 9 污水處理廠廠址選擇及排放水體論證 ...................................... 9 污水，污泥處理工藝方案 ................................................................... 10 污水處理工藝 ............................................................................ 10 常規(guī)二級處理工藝 .................................................................... 11 污水脫氮除磷工藝 .................................................................... 13 生物脫氮除磷基本原理 ............................................................ 14 污水生物脫氮除磷工藝 ............................................................ 16 污水處理廠工藝選擇的方案比較 ....................................................... 20 方案一 Carrousel 2021 氧化溝 ................................................. 20 南京林業(yè)大學南方學院畢業(yè)論文 IV 方案二 A2/O 工藝 ..................................................................... 21 方案比較 .................................................................................... 22 污泥處理工藝 ........................................................................................ 24 污泥處理要求 ............................................................................ 24 污泥處理工藝 ............................................................................ 25 污泥最終處理 ............................................................................ 26 第三章 污水管道系統(tǒng)設計計算 ........................................................................ 28 比流量 q0的確定 .................................................................................. 28 污水管網(wǎng)布置方案選擇 ....................................................................... 28 污水管道的設計計算 ..............................