【正文】 畢業(yè)設(shè)計（論文）用紙 I 摘 要 本設(shè)計水質(zhì)為制革廢水，其特點： 水量水質(zhì)波動大 ； 可生化性好 ； 懸浮物濃度高，易腐敗，產(chǎn)生污泥量大 ； 廢水含 S2和總鉻等無機有毒化合物。 制革 廢水處理廠設(shè)計規(guī)模 20xxm3/d，設(shè)計水質(zhì)水量為： Q=20xxm3/d ，CODcr=1800～ 3000mg/L， PH=～ 10， SS=700～ 1000 ㎎ /l ， BOD=800～ 1200㎎ /l,色度 200～ 400 倍。經(jīng)處理后，應(yīng)達到下列出水水質(zhì)： COD≤300mg/L，色度≤80倍， SS≤150mg/L, BOD達 ≤100 mg/L,即達到 《污 水綜合排放標準》（ GB89781996）中 制革行業(yè)的 二級標準。 本工程方案設(shè)計依據(jù)有關(guān)環(huán)境保護在污水中的要求，采用混凝沉淀 —氧化溝工藝處理制革廢水，在詳細方案比較的基礎(chǔ)上，選擇了如下處理工藝流程： 圖 1 工藝流程圖 通過 設(shè)計 計算可知 COD 的去除率為 %, SS 的去除率為 95%,色度 去除為%。 經(jīng)技術(shù)經(jīng)濟分析，此方案投資總額 萬元，廢水處理成本為 / m3，有著良好的經(jīng)濟效益和社會效益。且節(jié)約用地、提高綠化、降低 能耗的理念在設(shè)計中得到充分的實踐，符合新時代環(huán)保的要求。 關(guān)鍵詞 ： 制革廢水 混凝沉淀 氧化溝 粗細格柵 沉砂池 調(diào)節(jié)池 混凝反應(yīng)池 沉淀池 氧化溝池 二沉池 紫外消毒間 脫水間 濃縮池 進水 青島理工大學(xué)畢業(yè)設(shè)計（論文）用紙 II Abstract The design is about the waste water treatment plant, and it features large fluctuation in its quality and quantity. It has a high removal of anic substances. It also has a high concentrations of suspended solids and produces large quantity of sludge. The wastewater contains inanic toxic pounds. The designing scale of waste water treatment plant is 20xx m3/d, the designing quality and quantity of water are: Q=20xxm3/d ， COD=1800～ 3000mg/L , BOD=800～ 1200㎎ /l ， PH=～ 10 ,SS=700～ 1000 ㎎ /l , Chroma =200～ 400 times. After disposing of it, the quality of water should attain the following standards: COD≤300mg/L,SS≤150mg/L， Chroma ≤ 80 times， BOD ≤100 mg/L ,reaching the second standard (GB89781996） of 《 integrated wastewater discharge standard》 . The design of this project is in accordance with requirements of the environmental protection in the wastewater. It uses the contact oxidation process – oxidation ditch process to deal with the wastewater in tanning industry. Based on parison of the detailed program, we select the following processes: tannery wastewater → Grids →primary sedimentation tank →balance pond →oxidation ditch process→ coagulating sedimentation →secondary clarifier → UV disinfection →Drainage sludge treatment process: enrichment →sludge dewatering →outbound logistics Through designing, we can know that the result of ? COD is %,ηSS is 95%, chrominance is %. After technical and economic analyzing, the investment amount of this project is Yuan, and the cost of disposal of waste water is Yuan/ m3. It not only gains good economic and social benefits, but also fully puts the ideas of saving land economically, improving landscaping and reducing energy consuming into the practice while designing, which is in conformity with new era environmental needs. KEY WORDS: tannery wastewater, oxidation ditch process， coagulating sedimentation 青島理工大學(xué)畢業(yè)設(shè)計（論文）用紙 III 目錄 摘 要 ...............................................................................................................................I Abstract ........................................................................................................................ II 前 言 .............................................................................................................................. 1 第一章 緒論 ................................................................................................................ 2 制革廢水的產(chǎn)生及特點 ........................................................................................ 2 制革廢水的水質(zhì)及水量分析 ......................................................................... 3 不同工序排放的廢水水質(zhì) ................................................................... 3 廢水水量 ............................................................................................... 3 制革廢水的危害 ............................................................................................. 3 設(shè)計任務(wù) .......................................................................................................... 5 本畢業(yè)設(shè)計課題的目的和要求 .......................................................... 5 本畢業(yè)設(shè)計課題的技術(shù)要求與數(shù)據(jù) ................................................... 5 第二章 工藝流程確定 ............................................................................................... 6 制革廢水概況 ................................................................................................. 6 工藝流程比選、確定說明 .............................................................................. 6 方案設(shè)計原則 ....................................................................................... 6 制革廢水處理工藝 ............................................................................... 6 制革廢水處理工藝組合 ....................................................................... 7 工藝方案分析選擇 ： ...................................................................................... 7 混凝沉淀法 ........................................................................................... 7 生化法綜合比較 ................................................................................... 8 第三章 構(gòu)筑物設(shè)計計算 ......................................................................................... 12 進水渠道 ........................................................................................................ 12 格柵 ................................................................................................................ 12 設(shè)計概述 ............................................................................................ 12 設(shè)計參數(shù) ............................................................................................ 12 設(shè)計計算 ............................................................................................ 13 設(shè)計說明 ............................................................................................ 15 格柵機的選型 ..................................................................................... 16 沉砂池 ..............................................