【正文】 陜西理工學(xué)院畢業(yè)設(shè)計(jì) 生活污水脫氮除磷工程設(shè)計(jì) [摘要 ]某小區(qū) 每天生活污水的 最 大 排放 量為 28000t，污水水質(zhì)為： BOD=130mg/L， COD=280mg/L， SS=280mg/L，TP=， TN=30mg/L；根據(jù)進(jìn)水水質(zhì)特征及出水水質(zhì)要求，擬采用 CAST 作為該小區(qū)生活污水脫氮除磷的工藝，其處理流程為：進(jìn)水 → 中格柵 → 提升泵房 → 細(xì)格柵 → 平流沉砂池 →CAST 反應(yīng)池 → 接觸池 → 出水，污水經(jīng)處理后達(dá)到GB1891820xx一級(jí) A 標(biāo)準(zhǔn)，且整個(gè)處理自動(dòng)化程度高，噪音?。唤?jīng)預(yù)算整個(gè)工程初期投資較低，運(yùn)行成本 /(m3污水 )，適用于城市小區(qū)生活污水的處理，其設(shè)計(jì)過(guò)程可為類似污水處理 廠 設(shè)計(jì) 提供借鑒和參考。 [關(guān)鍵詞 ]小區(qū)生活污水； CAST；脫氮除磷 Engineering design of denitrification and phosphorus removal of sewage Abstract: A district sewage of maximum emissions is 28000 t every day,the designed water quality for BOD,COD,SS,TP and TN is 130mg/L,280mg/L,280mg/L,30mg/L respectively. According to the characters of influent water quality and effluent water quality requirements, the proposed CAST can be taken as a technology of plot sewage denitrification and phosphorus. The process is as follows: wastewater→ medium grille→ boost pump room→ Fine screen→ horizontal flow grit chamber→ CAST reaction pool→ contact chamber→ water purification. The sewage after treatment reach GB1891820xx grade A standard and the whole deal with a high degree of automation, low noise. After the initial investment of the project , budget is low, operation cost is yuan/ (m3) wastewater, it is suitable for urban residential sewage treatment, The design process can provide a reference for the similar wastewater treatment plant design. Key words:Community wastewater。Cyclic Activated Sludge System。 Nitrogen and phosphorus removal 陜西理工學(xué)院畢業(yè)設(shè)計(jì) 目 錄 引言 .............................................................................................................. 1 1 設(shè)計(jì)任務(wù)及資料 ...................................................................................... 1 設(shè)計(jì)原始資料 ................................................................................... 1 設(shè)計(jì)任務(wù) ................................................................................... 1 水質(zhì)情況 ................................................................................... 1 設(shè)計(jì)要求 ........................................................................................... 1 污水處理廠設(shè)計(jì)原則 ................................................................ 1 污水處理工程運(yùn)行過(guò)程中應(yīng)遵循的原則 .................................. 2 環(huán)境條件狀況 ................................................................................... 2 排水 系統(tǒng) ........................................................................................... 2 設(shè)計(jì)依據(jù) ........................................................................................... 2 2 污水處理工藝流程的確定 ...................................................................... 2 設(shè)計(jì)水量的確定 ................................................................................ 2 設(shè)計(jì)水質(zhì)分析 ................................................................................... 2 進(jìn)出水水質(zhì) ............................................................................... 2 污水處理程度計(jì)算 .................................................................... 3 進(jìn)水水質(zhì)分析 ........................................................................... 3 2. 3 小區(qū)生活污水處理原則 .................................................................... 3 2. 4 核心工藝的確定 ............................................................................... 4 常用工藝的介紹 ....................................................................... 4 CAST 工藝 ................................................................................ 6 污水處理工藝流程圖 ........................................................................ 7 3 處理構(gòu)筑物 設(shè)計(jì)計(jì)算 .............................................................................. 8 中格柵 ............................................................................................... 8 設(shè)計(jì)參數(shù) ................................................................................... 8 中格柵設(shè)計(jì)計(jì)算 ........................................................................ 8 細(xì)格柵 ............................................................................................. 10 設(shè)計(jì)參數(shù) ................................................................................. 10 細(xì)格柵設(shè)計(jì)計(jì)算 ......................................................................11 污水提升泵房 ................................................................................. 13 泵站設(shè)計(jì)的原則 ..................................................................... 13 泵房形式及工藝布置 .............................................................. 13 泵房設(shè)計(jì)計(jì)算 ......................................................................... 13 沉砂池設(shè)計(jì)計(jì)算 .............................................................................. 13 沉砂池的選型 ......................................................................... 13 旋 流 式 沉砂池 的設(shè)計(jì)參數(shù) ...................................................... 14 旋 流式 沉砂池 尺寸設(shè)計(jì) .......................................................... 14 CAST 反應(yīng)池設(shè)計(jì)計(jì)算 .................................................................... 16 CAST 反應(yīng) 池設(shè)計(jì)參數(shù)的選取 ................................................. 16 CAST 反應(yīng)池設(shè)計(jì) ................................................................... 16 需氧量及供氣量計(jì)算 .............................................................. 19 CAST 反應(yīng)池主要設(shè) 備設(shè)計(jì)計(jì)算 ..................................................... 22 曝氣設(shè)備的選擇 ..................................................................... 22 鼓風(fēng)機(jī)的選定 ......................................................................... 22 陜西理工學(xué)院畢業(yè)設(shè)計(jì) 潷水器的選擇 ......................................................................... 22 潛水?dāng)嚢杵鞯倪x擇 .................................................................. 23 污泥回流泵 ............................................................................. 23 剩余污泥量 ............................................................................. 24 消毒設(shè)施計(jì)算計(jì)算 ...........................................................