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<b>污水處理</b> </h2> <div id="vb62q8t" class="display_title"> <h1>食品加工廢水</h1> <div id="vb62q8t" class="info"> <span id="vb62q8t" class="font_size">文字：<a href="javascript:setFontSize(16);">[大]</a><a href="javascript:setFontSize(14);">[中]</a><a href="javascript:setFontSize(12);">[小]</a></span> <span id="vb62q8t" class="PublishedDate">2019-3-7 </span> <span id="vb62q8t" class="Hits">瀏覽次數：<b class="red" id="hits"></b> </span> <div id="vb62q8t" class="share_box"> <div id="vb62q8t" class="share_name">一鍵分享</div> <div style="display: none;background:#E9EBEA" class="share_content">  <div id="vb62q8t" class="bdsharebuttonbox"><a href="#" class="bds_more" data-cmd="more"></a><a href="#" class="bds_qzone" data-cmd="qzone" title="分享到QQ空間"></a><a href="#" class="bds_tsina" data-cmd="tsina" title="分享到新浪微博"></a><a href="#" class="bds_tqq" data-cmd="tqq" title="分享到騰訊微博"></a><a href="#" class="bds_renren" data-cmd="renren" title="分享到人人網(wǎng)"></a><a href="#" class="bds_weixin" data-cmd="weixin" title="分享到微信"></a></div>  </div> </div> </div> <div id="vb62q8t" class="others enquiry"> </div>   </div> <div class="vb62q8t" id="info_content" class="display_content display_article"> <div> <img src="http://tuoerjingroup.host1.china-21.com/uploads/200717/1-200GGK336136.jpg" /><br /> <br /> 食品廢水特點(diǎn)</div> <div> 食品工業(yè)原料廣泛，制品種類(lèi)繁多，排出廢水的水量、水質(zhì)差異很大。廢水中主要污染物有(1)漂浮在廢水中固體物質(zhì)，如菜葉、果皮、碎肉、禽羽等；(2)懸浮在廢水中的物質(zhì)有油脂、蛋白質(zhì)、淀粉、膠體物質(zhì)等；(3)溶解在廢水中的酸、堿、鹽、糖類(lèi)等：(4)原料夾帶的泥砂及其他有機物等；(5)致病菌毒等。食品工業(yè)廢水的特點(diǎn)是有機物質(zhì)和懸浮物含量高，易腐敗，一般無(wú)大的毒性。其危害主要是使水體富營(yíng)養化，以致引起水生動(dòng)物和魚(yú)類(lèi)死亡，促使水底沉積的有機物產(chǎn)生臭味，惡化水質(zhì)，污染環(huán)境。</div> <div> 國內外概況</div> <div> 中國對食品廢水污染的治理與西方發(fā)達國家相比起步較晚，在借鑒國外先進(jìn)處理技術(shù)經(jīng)驗的基礎上，以國家科技攻關(guān)課題為平臺，引進(jìn)和開(kāi)發(fā)了大量的食品廢水處理新技術(shù)，某些項目已達到國際先進(jìn)水平。這些新技術(shù)的投產(chǎn)運行為緩解中國嚴峻的水污染現狀，改善水環(huán)境發(fā)揮了至關(guān)重要的作用。</div> <div> 我國特別是在中小城鎮中分布著(zhù)大量的食品加工企業(yè),這些企業(yè)的現代化程度和生產(chǎn)規模日益提高,但是產(chǎn)生的廢水水質(zhì)惡劣,廢水量不斷增加,對環(huán)境危害十分嚴重。食品工業(yè)包括飲料工業(yè)是耗水大戶(hù),這些耗用的水僅少部分用于食品生產(chǎn)本身,大部分是用于食品生產(chǎn)過(guò)程洗滌和清潔的,因此完全可以將這些廢水加以回收利用?；旧弦约Z食為主要原料的發(fā)酵工業(yè)所產(chǎn)生的污染物主要是由于糧食未被充分利用造成的,因此,排入水環(huán)境的污染物絕大部分是具有回收價(jià)值的產(chǎn)品和副產(chǎn)品。</div> <div> 現代廢水處理技術(shù)分三類(lèi)：物理處理法，化學(xué)處理法，生物化學(xué)處理法。物理處理法包括：沉淀法，過(guò)濾法，離心分離法，浮選法；化學(xué)處理法包括：混凝法，中和法，氧化還原法，電解法，萃取法，吹脫法，吸附法，電滲析法，反滲透法；生物化學(xué)處理法：活性污泥法，生物膜法氧化塘法，土地處理法。另外還有一些新技術(shù)，如酶促降解法，高效降解菌的應用，超聲波技術(shù)的應用，磁分離法，超臨界水氧化法，電極生物膜法等。</div> <div> 廢水處理方法</div> <div> 食品工業(yè)廢水處理除按水質(zhì)特點(diǎn)進(jìn)行適當預處理外，一般均宜采用生物處理。如對出水水質(zhì)要求很高或因廢水中有機物含量很高，可采用兩級曝氣池或兩級生物濾池，或多級生物轉盤(pán)．或聯(lián)合使用兩種生物處理裝置，也可采用厭氧—需氧串聯(lián)的生物處理系統。</div> </div> <div id="vb62q8t" class="clear"></div> <dl class="diplay_foot clearfix"> <dt><a href="javascript:history.back(-1);">返回上一步</a></dt> <dd> <a href="javascript:print();">打印此頁(yè)</a> </dd> </dl> <ul class="page_up_dn"> <li> <a 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