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href='list_20.html'>行業(yè)資訊</a></em> <div id="xlvpn1z" class="clear"></div></h1> <p><div class="l1ddhhn" id="newsview" class=" clearfix"> <div class="fxfpvbj" id="fontsizer"></div> <h2>怎樣因地制宜選擇廢水處理方法</h2> <div class="d5nt5hz" id="newsview_cs">作者：admin　　來(lái)源：http://www.hljxwh.com　　更新時(shí)間：2019-02-20　　閱讀數：348 </div> <div class="55nnprv" id="content">（1）一級處理選用物理處理方法，即用格柵、篩網(wǎng)、沉沙池、沉淀池、隔油池等構筑物，去除廢水中的固體懸浮物、浮油，開(kāi)端調整pH值，減輕廢水的墮落程度。廢水經(jīng)一級處理后，一般達不到排放規范（BOD去除率僅25－40%）。故一般為預處理階段，以減輕后續處理工序的負荷和進(jìn)步處理效果。<br /> <p> 　?。?）二級處理是選用生物處理方法及某些化學(xué)方法來(lái)去除廢水中的可降解有機物和部分膠體污染物。經(jīng)過(guò)二級處理后，廢水中BOD的去除率可達80-90％，即BOD合量可低于30mg/L。經(jīng)過(guò)二級處理后的水，一般可到達農灌規范和廢水排放規范，故二級處理是廢水處理的主體。但經(jīng)過(guò)二級處理的水中還存留一定量的懸浮物、生物不能分解的溶解性有機物、溶解性無(wú)機物和氮磷等藻類(lèi)增值營(yíng)養物，并含有病毒和細菌。因而不能滿(mǎn)足要求較高的排放規范，如處理后排入流量較小、稀釋才能較差的河流就或許引起污染，也不能直接用作自來(lái)水、工業(yè)用水和地下水的補給水源。 </p> <p> <img src="UpLoadFile/image/20190220/20190220100614551455.jpg" width="350" height="228" alt="廣東環(huán)保工程公司" /> </p> 　?。?）三級處理是進(jìn)一步去除二級處理未能去除的污染物，如磷、氮及生物難以降解的有機污染物、無(wú)機污染物、病原體等。廢水的三級處理是在二級處理的基礎上，進(jìn)一步選用化學(xué)法（化學(xué)氧化、化學(xué)沉淀等）、物理化學(xué)法（吸附、離子交換、膜分離技能等）以除去某些特定污染物的一種“深度處理”方法。明顯，廢水的三級處理耗資巨大，但能充沛運用水資源。<br /> 　　廢水處理適當雜亂，處理方法的選擇，必須根據廢水的水質(zhì)和數量，排放到的接收水體或水的用途來(lái)考慮。一起還要考慮廢水處理過(guò)程中發(fā)作的污泥、殘渣的處理運用和或許發(fā)作的二次污染問(wèn)題，以及絮凝劑的回收運用等。<br /> 文章源自：廣東環(huán)保工程公司 <a href="../" target="_blank">http://www.hljxwh.com/</a><br /></div> <div id="xjpjb5t" class="flickr"></div> <div class="vflnrzv" id="pageview" class="clear"> <ul> <li><a href="content_955.html" title="Previous">上一條：工程廢氣處理有哪些主要措施</a></li> <li><a href="content_953.html" title="Next">下一條：廢水處理系統中設置均質(zhì)調節池的作用</a></li> </ul> </div> </div></p></div> </div><div id="htjdjxf" class="clear" style="height:30px;"></div></div></div></div> <div class="5j5dlpj" id="fft"> <div class="91t5jn5" id="indexb"> <img src="Template/Free001/Images/hsewm_41.jpg" border="0" align="absmiddle" style="float:right; margin-top:50px;"/> <div class="z5pt5pr" 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