各種環(huán)保填料技術(shù)在高濃度氯堿化工廢水處理中應(yīng)用-江蘇美睿斯科環(huán)?？萍加邢薰?/title> <meta name="description" content=""> <meta name="keywords" content=""> <link href="/css/HituxCMSLoad/inner.css" rel="stylesheet" type="text/css" /> <link href="/css/HituxCMSLoad/common.css" rel="stylesheet" type="text/css" /> <script type="text/javascript" src="/js/jquery.min.js"></script> <script type="text/javascript" src="/js/functions.js"></script> <script type="text/javascript" src="/images/iepng/iepngfix_tilebg.js"></script> <script type="text/javascript"> window.onerror=function(){return true;} </script> <meta http-equiv="Cache-Control" content="no-transform" /> <meta http-equiv="Cache-Control" content="no-siteapp" /> <script>var V_PATH="/";window.onerror=function(){ return true; };</script> </head> <body> <h1><a href="http://zeronano.cn/">美日韩毛片,天天爽夜夜爽,亚洲性久久久影院,最近中文字幕免费mv</a></h1><div id="qq6gm" class="pl_css_ganrao" style="display: none;"><li id="qq6gm"><sup id="qq6gm"><th id="qq6gm"></th></sup></li><strong 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14:41:59??????點(diǎn)擊：<script language="javascript" src="/inc/article_view.asp?id=1574"></script></div> <div id="pnbtnnv" class="maincontent clearfix"> <div>生物接觸氧化法是在生物氧化池內(nèi)設(shè)置填料,使填料上長(zhǎng)滿生物膜,經(jīng)過(guò)充氧的廢水以一定的速度流經(jīng)填料,廢水與生物膜相接觸,并在生物膜微生物的作用下得到凈化的一種廢水處理方法。它的主要處理構(gòu)筑物———生物接觸氧化池是一種具有活性污泥法特點(diǎn)的生物膜法處理構(gòu)筑物。近年來(lái),在城市污水和工業(yè)廢水的生物處理過(guò)程中,生物接觸氧化法、生物流化床和上流式厭氧床的應(yīng)用越來(lái)越廣泛,特別是生物接觸氧化法在高濃度工業(yè)廢水處理及活性污泥曝氣池改造中的應(yīng)用尤為廣泛。而在此法工藝中,氧化池填充的載體填料是核心部分,填料技術(shù)(填料選型、填料支架、配套曝氣系統(tǒng))直接影響著該工藝的處理效率、投資與運(yùn)行費(fèi)用。</div> <div><br /> </div> <div><br /> </div> <div>　　1.載體填料的作用</div> <div><br /> </div> <div><br /> </div> <div>　　生物接觸氧化池中的載體填料主要有以下3個(gè)作用。①是微生物生長(zhǎng)的載體,為微生物提供棲息和代謝繁殖的穩(wěn)定環(huán)境,并盡可能保持較多的微生物量。②是氧化池中生物膜微生物與廢水接觸的場(chǎng)所,且對(duì)水流有強(qiáng)制性的紊動(dòng)作用,使廢水能夠再分布,同時(shí)它對(duì)氧化池中的空氣泡有重復(fù)切割作用,提高了水中溶解氧的濃度,強(qiáng)化了微生物、有機(jī)物、溶解氧三者之間的傳質(zhì)過(guò)程。③可以截留吸附廢水中的一部分懸浮物質(zhì),降低氧化池出水中的懸浮物濃度。</div> <div><br /> </div> <div><br /> </div> <div>　　2.幾種應(yīng)用較廣的填料及討論</div> <div><br /> </div> <div><br /> </div> <div>　　生物接觸氧化池的填料經(jīng)歷了砂石、焦炭、玻璃鋼、塑料、纖維等多種形式。近年來(lái),外都注重填料技術(shù)的研究和應(yīng)用,尤其是我相繼研究了幾種高效、經(jīng)濟(jì)的新型填料。</div> <div><br /> </div> <div><br /> </div> <div>　　2.1硬性填料中的不規(guī)則填料</div> <div><br /> </div> <div><br /> </div> <div>　　硬性填料中的不規(guī)則填料有焦炭、爐渣。它們的優(yōu)點(diǎn)是:易于就地取材,成本低廉,截流懸浮物的能力強(qiáng)。缺點(diǎn)是水流阻力大,易于堵塞,表面積小,附著生物量少。以爐渣為填料的生物接觸氧化法處理城市污水的試驗(yàn)和生產(chǎn)運(yùn)行的結(jié)果表明:根據(jù)污水濃度,選用適當(dāng)粒徑(20～50mm)的爐渣,以網(wǎng)箱作為爐渣填料支架,可長(zhǎng)期運(yùn)行,不發(fā)生堵塞,也不需要采取防堵塞措施,處理效果好,投資省,價(jià)格低廉,操作管理簡(jiǎn)化。該填料的工藝特點(diǎn)有:爐渣質(zhì)量輕,有良好的水力學(xué)性能,布?xì)夥绞降卯?dāng),可具有流態(tài)化的特點(diǎn);爐渣表面粗糙多孔,有較好的生物膜附著性,爐渣的吸附性能將污水中的有機(jī)物和溶解氧富集其表面,使微生物繁殖旺盛,生物膜活性高,從而提高了該工藝的處理效果。該方法也存在以下缺點(diǎn):膜更新較困難,不夠靈活;布?xì)饪刂撇缓?易發(fā)生堵塞;對(duì)高濃度工業(yè)廢水的實(shí)驗(yàn)結(jié)果尚待試驗(yàn)考核。由此可見(jiàn),硬性填料中以爐渣作為生物接觸氧化池填料較為適宜,開(kāi)展高濃度氯堿工業(yè)廢水的中小試及生產(chǎn)性試驗(yàn)前景廣闊。如獲成功,將會(huì)降低污水處理的投資和運(yùn)行費(fèi)用。</div> <div><br /> </div> <div><br /> </div> <div>　　2.2軟性填料</div> <div><br /> </div> <div><br /> </div> <div>　　20世紀(jì)80年代初,上海石化總廠環(huán)保研究所研制成功了軟性填料。這種軟性填料通常由尼龍、維綸、滌綸、腈綸等化學(xué)纖維編織成束,再用中心繩連接而成,以防腐金屬鋼結(jié)構(gòu)框架作為填料支架,以散流曝氣器作為曝氣供氧系統(tǒng)。其主要優(yōu)點(diǎn)是:質(zhì)量輕,強(qiáng)度高,物理化學(xué)性能穩(wěn)定;纖維束在紊動(dòng)的水中激烈漂動(dòng),呈立體結(jié)構(gòu),比表面積大,生物膜附著能力強(qiáng),生物膜與廢水的接觸效率高;纖維束隨水漂動(dòng),不易被生物膜堵塞,適宜處理濃度較高的有機(jī)廢水。</div> <div><br /> </div> <div><br /> </div> <div>　　從宜興市海之源環(huán)保填料有限公司的污水處理廠生物接觸氧化法處理氯堿化工廢水的運(yùn)行實(shí)踐來(lái)看,該種填料雖有以上優(yōu)點(diǎn),但也具有以下缺點(diǎn):易于結(jié)團(tuán)、纏繞、厭氣腐爛,使填料實(shí)際可利用表面積減小,去除率降低;造價(jià)高,使用周期短,即其穩(wěn)定性和經(jīng)濟(jì)性較差;填料鋼結(jié)構(gòu)支架易于腐蝕,與軟性填料綁扎連接處易于磨損,造成維綸中心繩易磨斷損壞;散流曝氣器曝氣強(qiáng)度大,與曝氣鋼管路絲扣連接處易于腐蝕損壞,進(jìn)一步加劇了填料中心繩磨損和鋼結(jié)構(gòu)支架的沖刷腐蝕。同時(shí)可以查看中污水處理工程網(wǎng)更多技術(shù)文檔。</div> <div><br /> </div> <div><br /> </div> <div>　　2.3半軟性填料</div> <div><br /> </div> <div><br /> </div> <div>　　1985年,北京紡織科學(xué)研究所研制了BS型半軟性填料產(chǎn)品獲得專利。在北京第三毛絨廠接觸氧化池內(nèi)進(jìn)行了生產(chǎn)運(yùn)行試驗(yàn),并獲得成功。它由變形聚乙烯塑料制成,主要特點(diǎn)是:特殊結(jié)構(gòu),每個(gè)填料起著小型分布器和布?xì)馄鞯淖饔?提高傳質(zhì)效率;不結(jié)球,無(wú)堵塞可能,且耐腐蝕耐磨,使用壽命長(zhǎng)。從錦化公司污水處理廠生物接觸氧化法處理氯堿化工廢水的生產(chǎn)運(yùn)行實(shí)踐來(lái)看,半軟性填料的主要缺點(diǎn)是:微生物附著性能差,掛膜速度慢,耐負(fù)荷沖擊能力弱,因而易造成處理效果不穩(wěn)定;并且,造價(jià)較高。</div> <div><br /> </div> <div><br /> </div> <div>　　2.4組合填料</div> <div>組合填料</div> <div><br /> </div> <div>　　1991年,某設(shè)備廠創(chuàng)新研制出纖塑組合填料,該填料由高分子聚合物、醛化合成的纖維組成,兼有軟性填料和半軟性填料的優(yōu)點(diǎn),改進(jìn)了結(jié)構(gòu)形式,比表面積大,空隙可變,耐生物降解,傳質(zhì)效果好,有良好的布?xì)獠妓阅?有較好的水流狀態(tài),同時(shí)改善氣泡的切割條件,掛膜迅速,脫膜更新容易。該填料優(yōu)點(diǎn)是:解決了軟性填料易結(jié)球、腐爛斷絲,半軟性填料掛膜困難、沖擊能力差等問(wèn)題。其缺點(diǎn)是造價(jià)較高。</div> <div><br /> </div> <div><br /> </div> <div>　　2.5彈性立體填料</div> <div><br /> </div> <div><br /> </div> <div>　　1991年,某設(shè)備廠還創(chuàng)新研制出彈性立體填料,是用聚烯烴塑料制成的一種具有彈性絲條的填料。該填料以繩、柱、管構(gòu)成的緊繃支架為中心支撐,彈性絲條在水中呈均勻輻射立體狀態(tài),經(jīng)特殊加工處理(抗氧化、親水穩(wěn)定、拉毛、吸附添加劑)的彈性絲條對(duì)水中的微小氣泡具有一定的吸附能力,均勻舒展的彈性絲對(duì)水中的氣泡進(jìn)行多層次連續(xù)切割,極大地加速了氧氣的轉(zhuǎn)移速率,充氧效率可提高一倍以上,氣水比可減少50%,即可使氧化池的供氣量減少一半,節(jié)省電量,降低了處理成本。它與硬性蜂窩填料相比,空隙可變性大,不堵塞;與軟性填料相比,不粘連結(jié)團(tuán);與半軟性填料相比,掛膜迅速;與組合填料比,造價(jià)低,耐沖擊性略差。彈性立體填料耐腐蝕、耐溫、耐老化,使用壽命長(zhǎng)達(dá)5年以上,啟動(dòng)掛膜快,實(shí)用表面積大,并能有效防止水流短路,污泥產(chǎn)生量小。</div> <div><br /> </div> <div><br /> </div> <div>　　2.6懸浮式填料</div> <div><br /> </div> <div><br /> </div> <div>　　浙江、江蘇一些環(huán)保廠家陸續(xù)開(kāi)發(fā)出一些新的填料產(chǎn)品,目前使用較廣的有球型填料、籠式組合填料、懸浮式填料等。這些填料在氯堿化工廢水處理中還有一些缺陷,主要是掛膜困難,易于被化工廢水中的沉淀物堵塞,造價(jià)較高。</div> <div><div id="pnbtnnv" class="CaseBlock" style="padding:0px;margin:0px;font-family:'Microsoft Yahei', Arial, Helvetica, sans-serif;line-height:normal;"><ul><div id="pnbtnnv" class="albumblock" style="padding:10px 15px 30px 17px;margin:0px;float:left;width:190px;height:240px;"><div 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