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class="editer prodetail cf"> <h1 class="title">農村生活污水處理技術(shù)</h1> <div id="db5rhfv" class="desc-tool tright"> <time>2017-11-27</time> </div> <div id="fhjdvzz" class="nrbox cf"> <div style="text-align:justify;"> <h1 style="padding:15px 0px 0px;margin:0px;font-size:18px;color:#FF0000;font-family:宋體, serif;text-align:-webkit-center;"> <span style="font-size:24px;"> <span style="color:#000000;">農村生活污水處理常用技術(shù)</span></span> </h1> <p> <span style="font-size:24px;"><span style="color:#000000;"><br /> </span></span> </p> </div> <p style="text-align:left;font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">生活污水是人們在日常生活中排出的廢水，如果不經(jīng)處理直接排放到水體中，污染有機物分解腐爛，會(huì )使水體中溶解氧消耗殆盡后發(fā)黑變臭。近年來(lái)農村生活污水的無(wú)序排放，已成為農村環(huán)境的重要污染源，造成農村河道水體變黑發(fā)臭、魚(yú)蝦絕跡、蚊蠅孳生; 生活污水中病菌蟲(chóng)卵還引起疾病傳播，使群眾的身體健康受到極大的影響。</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">1 農村生活污水的基本情況</span> </p> <p style="text-align:left;font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">農村居民排放的生活污水包括人糞尿及洗滌、洗浴和廚用廢水等。相對城鎮生活污水，農村生活污水具有分布散、污染物濃度相對較高、水量差異大等特點(diǎn)。</span> </p> <p style="text-align:left;font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">農村居民生活用水量受生活條件狀況(給水系統、衛生器具完善程度、水資源利用方式等) 、生活習慣、節氣等因素直接影響。在具體確定用水量</span><span style="font-size:16px;"></span><span style="font-size:16px;">時(shí)，可參照表1，在調查分析當地居民的用水現狀、經(jīng)濟條件、用水習慣、發(fā)展潛力等狀況的基礎上酌情確定。</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">生活污水含有碳水化合物、蛋白質(zhì)、氨基酸、脂肪等有機物，一般不含有毒物質(zhì)，可根據表2 并結合實(shí)際情況確定生活</span><span style="font-size:16px;">的水質(zhì)。</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <br /> </p> <p align="center" style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <img border="0" src="/Public/Home/images/zw.png" data-original="http://www.dowater.com/jishu/UploadFiles_9416/201502/2015020410254435.jpg" width="360" /> </p> <p align="center" style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <img border="0" src="/Public/Home/images/zw.png" data-original="http://www.dowater.com/jishu/UploadFiles_9416/201502/2015020410260440.jpg" width="354" /> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">2 農村生活污水排放要求</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">目前，農村生活污水尚沒(méi)有統一的排放標準。大部分地區參考執行GB 18918—2002《城鎮污水處理廠(chǎng)污染物排放標準》一級B 標準要求。而根據GB 8978—1996《污水綜合排放標準》規定: 排入未設置二級污水處理廠(chǎng)的城鎮排水系統的污水，必須根據排水系統出水受納水域的功能要求分別執行相關(guān)標準。表3 列出了兩種不同污水排放標準常用的污染物指標，各地應根據受納水域的具體功能要求確定排放標準。</span> </p> <p align="center" style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <img border="0" src="/Public/Home/images/zw.png" data-original="http://www.dowater.com/jishu/UploadFiles_9416/201502/2015020410263723.jpg" width="359" /> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;"> 3 常用農村生活污水處理技術(shù)</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">近年來(lái)，隨著(zhù)湖泊富營(yíng)養化的程度不斷加劇，農村生活污水的治理越來(lái)越受到人們的重視。目前，在我國農村生活污水處理工程中所選用技術(shù)主要有地埋A/O-人工濕地、地埋A/O-生態(tài)塘、地埋A2/O-人工濕地、生物滴濾－人工濕地、一體化MBＲ技術(shù)，下面就這5 種主要的工藝技術(shù)進(jìn)行介紹，并對其優(yōu)缺點(diǎn)進(jìn)行對比。</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <br /> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">3. 1 地埋A/O-人工濕地</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">地埋A/O-人工濕地技術(shù)是在常規生化處理基礎上增設人工濕地系統進(jìn)行深度處理。人工濕地系統是人為的在有一定長(cháng)寬比和底面坡度的洼地上用土壤和填料(如礫石等) 混合組成填料床，使污水在床體的填料縫隙中流動(dòng)或在床體表面流動(dòng)，并在床體表面種植性能好、成活率高、抗水性強、生長(cháng)周期長(cháng)、美觀(guān)及具有經(jīng)濟價(jià)值的水生植物(如蘆葦，蒲草和美人蕉等) ，形成一個(gè)“基質(zhì)—微生物—植物”的復合生態(tài)系統，并利用這種復合生態(tài)系統獨特的凈化功能進(jìn)行水質(zhì)高效凈化。適用于地勢條件易于集水污水并能通過(guò)自流出水的且規模適中的村莊，處理規模20～200 t/天。</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">工藝參數: 缺氧池停留時(shí)間不小于4 h，好氧池停留時(shí)間不小于6 h，污泥清理周期180 天，人工濕地水力負荷0. 5 ～1. 0 m3/(m2·d) ，工藝流程見(jiàn)圖1。</span> </p> <p align="center" style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <img border="0" src="/Public/Home/images/zw.png" data-original="http://www.dowater.com/jishu/UploadFiles_9416/201502/2015020410270543.jpg" width="228" /> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;"> 人工濕地系統較之傳統處理系統有許多優(yōu)點(diǎn): ①建造和運行費用便宜，易于維護; ②處理工藝效果可靠，不僅能去除常規污染物，而且對營(yíng)養物質(zhì)等具有明顯的處理效果; ③可有效緩沖水力和污染負荷造成的沖擊。</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">同時(shí)，污水人工濕地處理系統也存在一定的缺點(diǎn): 占地面積大，每天處理噸水需要占地5～10 m2 ; 易受病蟲(chóng)害的影響; 生物和水力復雜性，使得設計運行參數不精確，需經(jīng)過(guò)2～ 3 個(gè)生長(cháng)季節，才能形成穩定的植物和微生物系統。</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <br /> <span style="font-size:16px;">3. 2 地埋A/O-生態(tài)塘</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">地埋A/O-生態(tài)塘技術(shù)是在常規生化處理后增加生態(tài)塘處理工藝。生態(tài)塘亦稱(chēng)氧化塘或穩定塘，是一種利用天然凈化能力對污水進(jìn)行處理的構筑物的總稱(chēng)。其凈化過(guò)程與自然水體的自?xún)暨^(guò)程過(guò)程相似，通常是將土地進(jìn)行適當的人工修整，建成池塘，并設置圍堤和防滲層，依靠塘內生長(cháng)的微生物來(lái)處理污水。生物塘是以太陽(yáng)能為初始能量，通過(guò)在塘中種植水生植物，進(jìn)行水產(chǎn)和水禽養殖，形成人工生態(tài)系統，在太陽(yáng)能(日光輻射提供能量) 作為初始能量的推動(dòng)下，通過(guò)生物塘中多條食物鏈的物質(zhì)遷移、轉化和能量的逐級傳遞、轉化，將進(jìn)入塘中污水的有機污染物進(jìn)行降解和轉化，最后不僅去除了污染物，而且以水生植物和水產(chǎn)、水禽的形式作為資源回收，凈化的污水也可作為再生資源予以回收再用，使污水處理與利用結合起來(lái)，實(shí)現污水處理資源化。該技術(shù)適用于擁有自然池塘或閑置溝渠，地勢條件易于收集污水，并能通過(guò)自流出水的且規模適中的村莊，處理規模20～200t/天。</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">工藝參數: 缺氧池停留時(shí)間不小于4 h，好氧池停留時(shí)間不小于6 h，生態(tài)塘停留時(shí)間不小于24 h，污泥清理周期180天，工藝流程見(jiàn)圖2。</span> </p> <p align="center" style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <img border="0" src="/Public/Home/images/zw.png" data-original="http://www.dowater.com/jishu/UploadFiles_9416/201502/2015020410273178.jpg" width="215" /> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;"> 生態(tài)塘較傳統處理工藝基建投資和運行費用低、維護和維修簡(jiǎn)單、管理方便; 但負荷低，占地大，受氣候影響較大，若設計或運行管理不當，則會(huì )造成二次污染。</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <br /> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">3. 3 地埋A2/O-人工濕地</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">A2/O 工藝亦稱(chēng)A-A-O 工藝，本工藝為采用厭氧—缺氧—好氧法生物脫氮除磷工藝的簡(jiǎn)稱(chēng)，是流程最簡(jiǎn)單，應用最廣泛的脫氮除磷工藝。適用于處理要求較高，四季氣候變化大，氣溫較低的地區。處理規模不小于200 噸/天。</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">工藝參數: 厭氧池停留時(shí)間不小于2 h，缺氧池停留時(shí)間不小于4 h，好氧池停留時(shí)間不小于6 h，人工濕地水力負荷0. 5～1. 0 m3/(m2·d) ，污泥理周期180 天，工藝流程見(jiàn)圖3。</span> </p> <p align="center" style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <img border="0" src="/Public/Home/images/zw.png" data-original="http://www.dowater.com/jishu/UploadFiles_9416/201502/2015020410275562.jpg" width="238" /> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;"> 地埋A2/O 工藝主要優(yōu)點(diǎn)有: ①脫氮除磷效果好，出水水質(zhì)好; ②工藝穩定可靠，便于集中管理。</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">但是A2/O 處理工藝也存在一定的缺點(diǎn): 反應池容積較A/O 工藝要大; 需要設置內回流，能耗高; 運行費用高。</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <br /> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">3. 4 生物滴濾工藝</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">生物滴濾法，亦稱(chēng)滴濾池工藝，一般以碎石或塑料制品為濾料，污水噴灑在濾層上部，沿濾料孔隙下滲時(shí)，有一部分污水、污染物和細菌附著(zhù)在濾料表面上，微生物便在濾料表面大量繁殖，形成生物膜。污水中的有機污染物被生物膜中的微生物吸附、降解，從而得到凈化。本技術(shù)適用于處理要求一般，規模較小，距離居民區較遠的污水處理設施，處理規模10～30 噸/天。</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">工藝參數: 集水池停留時(shí)間不小于12 h，缺氧池停留時(shí)間不小于12 h，生物濾塔負荷0. 2～0. 3 m3/(m2·d) ，人工濕地水力負荷0. 5～1. 0 m3/(m2·d) ，污泥理周期180 天，工藝流程見(jiàn)圖4。</span> </p> <p align="center" style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <img border="0" src="/Public/Home/images/zw.png" data-original="http://www.dowater.com/jishu/UploadFiles_9416/201502/2015020410282232.jpg" width="221" /> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">生物濾池可分為普通生物濾池、高負荷生物濾池和塔式生物濾池3 類(lèi)。其中，塔式生物濾池處理效率高、占地面積小，且可通過(guò)自然通風(fēng)供氧節省能耗，適用于處理農村生活污水，污水沿塔自上而下流動(dòng)，在自然供氧(動(dòng)力供氧) 的情況下，使好氧微生物在濾料表面形成生物膜，去除污水中呈懸浮、膠體和溶解狀態(tài)的污染物質(zhì)。但是，生物滴濾工藝有以下缺點(diǎn): 濾料易堵塞; 產(chǎn)生濾池蠅，散發(fā)惡臭; 若使用風(fēng)機曝氣，則較人工處理費用高。</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <br /> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">3. 5 一體化MBR工藝</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">MBR是一種將活性污泥法和一體化浸沒(méi)式膜分離系統結合的傳統改良型工藝，利用膜組件進(jìn)行的固液分離過(guò)程取代了傳統的沉降過(guò)程，能有效的去除固體懸浮顆粒和有機顆粒，制備無(wú)菌水。系統出水可直接用于生產(chǎn)或生活回用。廢水通過(guò)本處理系統處理排放出水的各項指標均可以達到《城市污水再生利用城市雜用水水質(zhì)》的指定標準。該技術(shù)適用于有回用要求或用地緊張的的污水處理設施，處理規模20 ～500 噸/天。</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">工藝參數: 缺氧反應區停留時(shí)間不小于2 h，MBR區停留時(shí)間不小于4 h，污泥理周期360 天，工藝流程見(jiàn)圖5。</span> </p> <p align="center" style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <img border="0" src="/Public/Home/images/zw.png" data-original="http://www.dowater.com/jishu/UploadFiles_9416/201502/2015020410285278.jpg" width="179" /><img border="0" src="/Public/Home/images/zw.png" data-original="http://www.dowater.com/jishu/UploadFiles_9416/201502/2015020410291769.jpg" width="588" /><span style="font-size:16px;"> </span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;"> 一體化MBR設備具有自動(dòng)化程度高，出水水質(zhì)好，施工周期短，占地面積小，出水水質(zhì)穩定，污泥產(chǎn)量少等優(yōu)點(diǎn)。</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">不足之處是投資大，膜組件造價(jià)高; 其次是高強度曝氣，能耗高; 第三是膜污染清洗，需定期更換。具體參見(jiàn)</span><a target="_blank"><u><span style="color:#000000;font-size:16px;">http://www.</span></u></a><u><span style="color:#000000;font-size:16px;">gdhanbang.net</span></u><span style="font-size:16px;">更多相關(guān)技術(shù)文檔。</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <br /> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">3. 6 小結</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">將農村生活污水處理工程中所選用技術(shù)主適用范圍及各自?xún)?yōu)點(diǎn)一并列于表4，為各農村根據其實(shí)際情況及需求選擇適用的生活污水處理技術(shù)提供參考。</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <br /> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">4. 結語(yǔ)</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;">我國“十一五”發(fā)展規劃中指出，要將我國農村建設成生產(chǎn)發(fā)展、生活寬裕、鄉風(fēng)文明、村容整潔、管理民主的社會(huì )主義新農村，這是大力推進(jìn)全面小康社會(huì )建設和農民奔小康、享受現代化生活的重要舉措。推進(jìn)農村“三集中”建設，實(shí)現居住區市政公用設施統一規劃、統一設計、統一配套建設，是確保村容整潔的前提。農村生活污水排放實(shí)現管網(wǎng)化，集中凈化，化害為利，才可實(shí)現“清潔水源、清潔田園、清潔家園”，創(chuàng )建優(yōu)美人居環(huán)境。</span> </p> <p style="font-family:宋體, serif;font-size:14px;background-color:#FFFFFF;"> <span style="font-size:16px;"><br /> </span> </p> <span style="font-family:宋體, serif;font-size:16px;background-color:#FFFFFF;"><strong>污水處理技術(shù)咨詢(xún)電話(huà)：4000-138-380.</strong></span> <p style="margin-top:0px;margin-bottom:0px;padding:0px 0px 20px;text-indent:2em;color:#333333;font-family:宋體, 微軟雅黑, 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