MBR工藝處理印染廢水的現(xiàn)狀與展望-深圳市恒大興業(yè)環(huán)?？萍加邢薰?/title> <meta name="keywords" content="印染廢水處理、一體化污水處理設(shè)備、mbr膜生物反應(yīng)器、印染mbr膜組件"> <meta name="description" content="MBR作為一種較新的印染廢水處理系統(tǒng),由于其諸多優(yōu)點(diǎn)而得到廣泛的研究和應(yīng)用。印染廢水的特點(diǎn)與MBR工藝有著良好的切合點(diǎn),隨著MBR技術(shù)研究的發(fā)展和印染行業(yè)清潔生產(chǎn)的倡導(dǎo),采用MBR技術(shù)處理印染廢水將會(huì)有良好的應(yīng)用前景,其對(duì)印染行業(yè)清潔生產(chǎn)的實(shí)現(xiàn)也將作出重要貢獻(xiàn)。"> <link href="/template/hdxy/skin/css/bootstrap.min.css" rel="stylesheet"> <link href="/template/hdxy/skin/css/style.css" rel="stylesheet">  <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://lashoushou.cn/">啊灬啊灬啊灬快灬高潮了女,国产一区网站,精品八区,欧美国产在线一区</a></h1><div id="olbhb" class="pl_css_ganrao" style="display: none;"><delect id="olbhb"><tfoot id="olbhb"><ul id="olbhb"><nobr id="olbhb"></nobr></ul></tfoot></delect><xmp 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膜生物反應(yīng)器(MembraneBioreactor,簡(jiǎn)稱MBR),是集高效膜分離技術(shù)和生物反應(yīng)的生物降解為一體的生物化學(xué)反應(yīng)系統(tǒng)。它用膜組件替代傳統(tǒng)活性污泥法中的沉淀池,實(shí)現(xiàn)泥水分離,從而對(duì)廢水進(jìn)行處理,具有固液分離率高、出水水質(zhì)好、處理效率高、占地空間小和運(yùn)行管理簡(jiǎn)單等特點(diǎn)。目前,我國(guó)研究的膜生物反應(yīng)器(MBR)主要用于固液分離與截留,即分離膜反應(yīng)器，按照膜單元的放置,MBR分為外置式[循環(huán)式,圖a和浸沒式(一體式,圖b）;按照是否需要氧,又可分為好氧和厭氧膜生物反應(yīng)器。</p><p style="text-align: center;"> <img src="/static/upload/image/20240529/1716968670209793.png" alt="印染廢水處理" width="1000" height="460" border="0" vspace="0" style="width: 1000px; height: 460px;"/> </p><p> 外置式膜生物反應(yīng)器(RMBR)的特點(diǎn)是：膜組件自成體系,運(yùn)行穩(wěn)定可靠,膜通量大,清洗、更換和增設(shè)方便等。其缺點(diǎn)是泵高速旋轉(zhuǎn)產(chǎn)生的剪切力,會(huì)使某些微生物細(xì)菌體失活,而且一般條件下,為減少污染物在膜表面的沉積,由循環(huán)泵提供的水流流速都較高,因此動(dòng)力消耗也較大。浸沒式膜生物反應(yīng)器(SMBR)最大的特點(diǎn)是：運(yùn)行費(fèi)用低,中空纖維式膜組件由于體積小、組裝靈活,可分組設(shè)置成若干框架結(jié)構(gòu),便于從曝氣池中拿出,。膜組件和生物反應(yīng)器的結(jié)合,使MBR具有許多優(yōu)點(diǎn):膜能將活性污泥完全截留在反應(yīng)器內(nèi),因此污泥濃度高,大大提高了反應(yīng)速率,增強(qiáng)了系統(tǒng)的耐沖擊力,還減少了污泥的產(chǎn)生量;實(shí)現(xiàn)了SRT(泥齡)和HRT(水力停留時(shí)間)的分別控制,有利于自動(dòng)化控制,提高污染物停留時(shí)間,一些難降解的大分子顆粒狀物質(zhì)和活性大分子化合物也能被膜截留下來;增加了生長(zhǎng)時(shí)間較長(zhǎng)的細(xì)菌,如硝化菌和亞硝化菌等,因此MBR脫氮除磷效果比傳統(tǒng)活性污泥法大為增強(qiáng)。</p><p> 我國(guó)是紡織大國(guó),印染行業(yè)每天有400多萬噸的廢水排放,占工業(yè)廢水的1/10,且每年要耗用100多億噸清潔水,是我國(guó)用水量大、排放量大的工業(yè)部門之一。按1t印染廢水污染20t清潔水體計(jì)算,每年未達(dá)標(biāo)排放的廢水又會(huì)污染清潔水150億噸。印染廢水具有“高濃度、高色度、高pH值、難降解和多變化”等五大特征,其處理難度主要集中在以下兩個(gè)方面。</p><ol class=" list-paddingleft-2" style="list-style-type: decimal;"><li><p>COD(化學(xué)需氧量)難以降低加工生產(chǎn)中運(yùn)用的助劑(滲透劑、助染劑等),95%以上滯留在印染廢水中,造成COD濃度高。染料廢水中的污染物以有機(jī)物為主,理論上大部分可生化,但其水質(zhì)BOD(生物需氧量)與COD比值一般較低,因此可生化而又不易生化。2. 曝氣池活性污泥對(duì)多變化的染料中間體廢水的馴化、適應(yīng)也不甚容易。這些都是印染廢水難以被有效降解,凈化后水質(zhì)COD值仍然偏高的癥結(jié)所在。如何提高COD去除率,是印染廢水亟待解決的難題之一。</p></li><li><p> 有機(jī)物質(zhì),無論其對(duì)微生物有無抑制作用,都不能被微生物攝食。而在實(shí)際生產(chǎn)運(yùn)行中,這類有機(jī)物質(zhì)經(jīng)多次生化仍難以大量去除,凈化后的COD值仍然較高。我國(guó)科技工作者在對(duì)江、浙、滬、閩、魯和粵等主要紡織地區(qū)調(diào)研過程中發(fā)現(xiàn),目前國(guó)內(nèi)大部分印染企業(yè)為提高COD去除率,通常采用增加絮凝和生化反應(yīng)時(shí)間的方法,即所謂“生化再生化”、“絮凝再絮凝”。這將導(dǎo)致污水處理工程占地面積大、流程長(zhǎng)、工程費(fèi)用高,而處理效果也難以令人滿意。在上海、山東、遼寧等地,一些企業(yè)把并聯(lián)曝氣池改為串聯(lián)運(yùn)行,生化處理效率有所提高,但污水凈化程度的提高相當(dāng)有限。</p></li><li><p>高色度廢水難以脫色,近年來,國(guó)內(nèi)外對(duì)染料、顏料類工業(yè)廢水的脫色方法進(jìn)行了大量技術(shù)研究,總結(jié)出了許多行之有效的脫色技術(shù),如絮凝法、吸附法、氯氣和次氯酸鈉法等。這些技術(shù)針對(duì)性較強(qiáng),對(duì)不同的廢水處理都能取得一定的效果。但是,由于印染廢水中含有的染料及其中間體品種多、類別復(fù)雜,在處理上有相當(dāng)難度。加之國(guó)產(chǎn)染料上染率較低,印染生產(chǎn)企業(yè)一般都會(huì)超量投加,導(dǎo)致染色后剩余染料較多,不但造成資源浪費(fèi),而且產(chǎn)污量比發(fā)達(dá)國(guó)家多近一倍,加劇了廢水污染的程度。</p><p style="text-align: center;"><img src="/static/upload/image/20240529/1716968743152420.png" alt="印染廢水處理" width="1000" height="632" border="0" vspace="0" style="width: 1000px; height: 632px;"/><br/></p></li></ol><p> </p><p>迄今為止,我國(guó)在MBR處理印染廢水方面的研究主要有以下特點(diǎn):</p><p>(1) 總體研究量少,研究面相對(duì)較窄,多數(shù)研究集中在處理效果上,對(duì)反應(yīng)機(jī)理研究甚少,涉及膜污染方面的內(nèi)容也不多;</p><p>(2) 研究規(guī)模主要為小試和中試,大多數(shù)是在實(shí)驗(yàn)室完成的,有的甚至采用模擬印染廢水,與實(shí)際偏差較大,工程實(shí)際應(yīng)用研究極少;</p><p>(3) 在工藝方面,基本上為好氧MBR與其它工藝組合處理印染廢水,MBR技術(shù)優(yōu)勢(shì)沒有完全體現(xiàn);</p><p>(4) 高校在該項(xiàng)研究中占主要力量,如東華大學(xué)和天津工業(yè)大學(xué),前者前身是中國(guó)紡織大學(xué),與紡織印染行業(yè)聯(lián)系緊密,后者直屬企業(yè)天津工大膜天膜集團(tuán)公司,是我國(guó)膜行業(yè)的佼佼者,他們開展該方面的研究均與其特殊的身份有關(guān)。</p><p> </p><p>隨著染料工業(yè)的飛速發(fā)展和技術(shù)的進(jìn)步,新型助劑、染料等在印染行業(yè)中被大量使用,難降解有毒有機(jī)組分的含量也越來越多。MBR技術(shù)的研究將集中在</p><p>(1)膜污染機(jī)理的研究和預(yù)防,保持膜通量的基礎(chǔ)上降低運(yùn)行和維護(hù)成本;</p><p>(2)新型膜材料的研究和開發(fā);</p><p>(3)自動(dòng)化程度的進(jìn)一步提高等。</p><p>(4)由于MBR技術(shù)對(duì)印染廢水處理有較強(qiáng)的適用性,MBR工藝處理印染廢水的研究和應(yīng)用將越來越多。</p><p>(5)多樣化的組合工藝與MBR工藝組合處理印染廢水,可彌補(bǔ)MBR技術(shù)的不足,充分發(fā)揮其作用。單獨(dú)采用MBR工藝處理印染廢水也將會(huì)是未來研究的一個(gè)新方向。</p><p>(6)MBR技術(shù)處理印染廢水將會(huì)更多地應(yīng)用到實(shí)際工程中,小處理量的成型MBR設(shè)備將會(huì)出現(xiàn),并被推廣應(yīng)用于小型分散型印染企業(yè)。</p><p> MBR作為一種較新的印染廢水處理系統(tǒng),由于其諸多優(yōu)點(diǎn)而得到廣泛的研究和應(yīng)用。印染廢水的特點(diǎn)與MBR工藝有著良好的切合點(diǎn),隨著MBR技術(shù)研究的發(fā)展和印染行業(yè)清潔生產(chǎn)的倡導(dǎo),采用MBR技術(shù)處理印染廢水將會(huì)有良好的應(yīng)用前景,其對(duì)印染行業(yè)清潔生產(chǎn)的實(shí)現(xiàn)也將作出重要貢獻(xiàn)。</p> </div> <hr> <p>上一篇：<a href="/industry/560.html">一體化污水處理遇上AI，塑造產(chǎn)業(yè)新動(dòng)力</a></p> <p>下一篇：<a href="/industry/567.html">高效智能一體化醫(yī)療污水處理設(shè)備引領(lǐng)環(huán)保新紀(jì)元</a></p> </div> <div id="zkqpejuw3cl" 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