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<dd> <div id="metqsxhb" class="View"> <div id="metqsxhb" class="PageView"> <h1 id="inside_rnewtil">印染廢水中色度的去除</h1> <div id="metqsxhb" class="inside_rnewtime">更新更新時(shí)間：2021-10-21 點(diǎn)擊次數(shù)：2947次</div> <div id="metqsxhb" class="inside_rnewcon"><p style=";padding: 0px;color: rgb(51, 51, 51);background-color: rgb(248, 248, 248);text-indent: 27px;font-family: 宋體;font-size: 13.3333px;white-space: normal"><span style="font-family: 宋體, SimSun; font-size: 16px;"> 印染工業(yè)廢水色度較大，會(huì)給印染廢水的排水帶來不良的外觀影響，同時(shí)這些有色污染物也往往是一種環(huán)境毒物，同其它指標(biāo)有一定的相關(guān)性，在印染廢水的處理工程設(shè)計(jì)中，就不能僅僅滿足色度達(dá)標(biāo)排放，色度的去除與<span style="font-family: 宋體, SimSun; color: rgb(51, 51, 153);">COD等污染物的去除應(yīng)進(jìn)行綜合考慮，確保整個(gè)污水處理系統(tǒng)滿足使用要求。因此，印染廢水處理的脫色重點(diǎn)考慮采用生化處理工藝。</span></span></p><p style=";padding: 0px;color: rgb(51, 51, 51);background-color: rgb(248, 248, 248);text-indent: 27px;font-family: 宋體;font-size: 13.3333px;white-space: normal"><span style="font-family: 宋體, SimSun; font-size: 16px;"><span style="font-family: 宋體, SimSun; color: rgb(51, 51, 153);"></span></span></p><p style="text-align: center"><img src="https://img77.hbzhan.com/9/20211021/637704282945864904534.jpg" style="width:800px;"/></p><p style=";padding: 0px;color: rgb(51, 51, 51);background-color: rgb(248, 248, 248);text-indent: 27px;font-family: 宋體;font-size: 13.3333px;white-space: normal"><span style="font-family: 宋體, SimSun; font-size: 16px;"><span style="font-family: 宋體, SimSun; color: rgb(51, 51, 153);"></span></span><br/></p><p><span style="color: rgb(51, 51, 153); background-color: rgb(248, 248, 248); font-family: 宋體, SimSun; font-size: 16px;"></span></p><p style="margin-top: 10px;margin-bottom: 10px;padding: 0px;color: rgb(51, 51, 51);background-color: transparent;text-indent: 28px"> <span style="background-color: transparent; text-indent: 27px;">生物法脫色是利用微生物酶來氧化或還原染料分子，破壞其不飽和鍵及發(fā)色基團(tuán)。脫色微生物先將染料分子吸附和富集，接著再生物降解。染料分子通過一系列氧化、還原、水解、化合等生命活動(dòng)，最終降解成簡單無機(jī)物或轉(zhuǎn)化為各種營養(yǎng)物及原生質(zhì)。</span></p><p style=";padding: 0px;color: rgb(51, 51, 51);background-color: transparent;text-indent: 27px"> 染料分子細(xì)微的結(jié)構(gòu)變化會(huì)大大影響脫色率，不同的微生物對不同結(jié)構(gòu)的染料去除率差別較大；染料濃度對脫色率也有一定影響，高濃度染料<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">(</span>染料本身有較強(qiáng)的生物毒性<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">)</span>會(huì)抑制微生物活性，影響脫色效果。</p><p style=";padding: 0px;color: rgb(51, 51, 51);background-color: transparent;text-indent: 27px"> 好氧工藝是常見的處理工藝，但由于染料分子的抗生物降解性強(qiáng)，處理過程<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">BOD<sub>5</sub>/COD</span>比值下降<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">(</span>可生化性變差<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">)</span>，致使普通的好氧工藝對廢水色度、<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">COD</span>去除率不高<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">(60%</span>～<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">70%)</span>。通過向曝氣池中投加鐵鹽、活性碳等吸附物質(zhì)，可延長難降解物質(zhì)在系統(tǒng)內(nèi)的停留時(shí)間，提高曝氣池的活性污泥濃度，降低污泥負(fù)荷，從而提高了系統(tǒng)的脫色率和<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">COD</span>去除率。近年開發(fā)的厭氧<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">(</span>水解酸化<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">)</span>—好氧處理工藝能在一定程度上彌補(bǔ)好氧工藝的不足。難降解染料分子及其助劑在厭氧菌的作用下水解、酸化而分解成小分子有機(jī)物，接著被好氧微生物分解成無機(jī)小分子。但僅靠生化處理工藝無法滿足污水排放色度和<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">COD</span>穩(wěn)定達(dá)標(biāo)的要求。</p><p style=";padding: 0px;color: rgb(51, 51, 51);background-color: transparent;text-indent: 27px"> 針對企業(yè)的生產(chǎn)情況和不同的水質(zhì)，在必要的情況下，選擇技術(shù)上可靠，經(jīng)濟(jì)上可行，造價(jià)合理的工程設(shè)施，對廢水進(jìn)行預(yù)處理和后續(xù)處理，確保色度和其它的污染物能達(dá)標(biāo)排放。</p><p style=";padding: 0px;color: rgb(51, 51, 51);background-color: transparent;text-indent: 27px"> 梭織布印染工藝通常有退漿廢水、煮煉廢水、漂白廢水、絲光廢水、染色廢水等，這也是資料上報(bào)道較多的典型的印染廢水，該類廢水堿度大、色度高、<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">COD</span>高，并且水溫也較高，使用染料種類繁多，有時(shí)在生產(chǎn)工藝中使用硫化染料，會(huì)含有一定量的硫化物，如果采用<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">PVA</span>作為漿料，混合廢水中會(huì)含有一定量可生化性極差的<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">PVA</span>，對該類廢水單純采用厭氧—好氧或延時(shí)曝氣等工藝，出水<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">COD</span>、色度均難以達(dá)標(biāo)，在系統(tǒng)出水投加強(qiáng)氧化劑時(shí)，硫化物會(huì)轉(zhuǎn)化成硫單質(zhì)析出，出水呈稀米湯狀的乳白色，色度還是難以達(dá)標(biāo)。在該類廢水的處理中，如果在生化處理前增加物化處理設(shè)施，投加以硫酸亞鐵和聚合氯化鋁為主的脫色劑，可去除<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">80</span>％左右的色度以及<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">95</span>％以上的硫化物，<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">40</span>％左右的<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">COD</span>，這其中也去除了部分難降解的大分子染料，再在后續(xù)配以設(shè)計(jì)良好的生化工藝，該類廢水的<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">COD</span>和色度均能穩(wěn)定達(dá)標(biāo)。</p><p style=";padding: 0px;color: rgb(51, 51, 51);background-color: transparent;text-indent: 27px"> 牛仔紗線的漿染廢水色度高，<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">COD</span>高，特別是近年根據(jù)國外市場開發(fā)出來的絲光藍(lán)、絲光黑、特深藍(lán)、特深黑等印染工藝，該類印染大量使用硫化染料，印染助劑有硫化鈉等，因此廢水中含有大量的硫化物，常常高達(dá)<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">200</span>～<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">1000mg/L</span>，色度高達(dá)<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">2000</span>～<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">3000</span>倍，該類廢水也必須進(jìn)行物化加藥預(yù)處理，然后進(jìn)行生化處理，才能穩(wěn)定達(dá)標(biāo)排放。</p><p style=";padding: 0px;color: rgb(51, 51, 51);background-color: transparent;text-indent: 27px"> 牛仔服裝漂洗廢水中含有染料、漿料、表面活性劑等助劑，該類廢水水量大，濃度和色度均較低，如果單純采用物化處理，則出水<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">COD</span>也只在<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">100</span>～<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">200mg/L</span>之間，色度也能滿足排放要求，但污泥量大大增加，污泥處理的費(fèi)用較高，容易造成二次污染，在環(huán)保要求較嚴(yán)，應(yīng)考慮生化處理系統(tǒng)，常規(guī)的生化處理工藝均能滿足色度和<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">COD</span>的排放要求。</p><p style=";padding: 0px;color: rgb(51, 51, 51);background-color: transparent;text-indent: 27px"> 針織布<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">(</span>紗<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">)</span>印染廢水和毛衫印染廢水，多使用陽離子染料、活性染料、分散染料等，該類廢水的脫色在一級物化處理中，多采用以硫酸亞鐵為主的脫色劑，助凝劑常采用熟石灰粉，脫色效果良好，但是，石灰的投加會(huì)導(dǎo)致管道結(jié)垢堵塞，更有甚者水泵的葉輪都會(huì)結(jié)垢，污泥從沉淀池里排出都會(huì)很困難，造成系統(tǒng)的維修工作量很大，而且物化污泥量極大，污泥的處理很困難，常常使企業(yè)無法應(yīng)付，并且出水在流動(dòng)的過程中空氣中的氧氣會(huì)進(jìn)入水體，將二價(jià)鐵離子氧化為三價(jià)鐵離子，水體呈現(xiàn)渾濁的黃褐鐵銹色，對景觀影響也較大。近年有些企業(yè)也開發(fā)了一些高分子脫色劑，針對性強(qiáng)，效果較好，但由于印染企業(yè)排放的污水水質(zhì)波動(dòng)較大，難以做到普適性，而且均有一定的技術(shù)在里面，價(jià)格較高，造成企業(yè)的廢水處理費(fèi)用高，企業(yè)生產(chǎn)成本增加。并且一級物化簡單處理不能滿足達(dá)標(biāo)排放的要求。</p><p style=";padding: 0px;color: rgb(51, 51, 51);background-color: transparent;text-indent: 27px"> 針織布<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">(</span>紗<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">)</span>印染廢水和毛衫印染廢水一般可經(jīng)簡單預(yù)處理直接進(jìn)行厭氧—好氧為主的生化處理，設(shè)計(jì)良好的厭氧處理系統(tǒng)可去除<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">80</span>％左右的色度，但有時(shí)在好氧系統(tǒng)中出現(xiàn)色度增加的現(xiàn)象，二沉池的出水呈濃茶褐色，這時(shí)說明生化系統(tǒng)運(yùn)行良好，但此時(shí)生化出水殘余色度的去除除了強(qiáng)氧化劑之外其它的脫色劑的效果均不甚理想，強(qiáng)氧化劑與廢水的接觸反應(yīng)時(shí)間可控制在<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">30</span>—<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">60</span>分鐘。該類廢水的脫色還應(yīng)考慮水質(zhì)波動(dòng)的影響，企業(yè)在接到一批硫化印染的訂單時(shí)，常常是在一個(gè)星期或十天之內(nèi)均排放含硫化物的廢水，由于微生物適應(yīng)性等原因，所排放的廢水中的硫化物會(huì)強(qiáng)烈抑制微生物的活性，對生化系統(tǒng)的沖擊很大，造成出水的<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">COD</span>和色度均出現(xiàn)不同程度的超標(biāo)，這一部分廢水應(yīng)行物化預(yù)處理才能進(jìn)行生化處理。</p><p style=";padding: 0px;color: rgb(51, 51, 51);background-color: transparent;text-indent: 27px"> 根據(jù)不同的印染企業(yè)、不同的產(chǎn)品種類、不同的產(chǎn)品檔次、不同的生產(chǎn)工藝，結(jié)合色度和<span style="color: rgb(51, 51, 153); font-size: 13px; background-color: rgb(248, 248, 248); font-family: "Times New Roman";">COD</span>等其它污染物的排放標(biāo)準(zhǔn)，將廢水處理中的色度去除和整個(gè)工程設(shè)計(jì)進(jìn)行系統(tǒng)考慮，做到整個(gè)污水處理系統(tǒng)穩(wěn)定運(yùn)行、穩(wěn)定達(dá)標(biāo)。</p><p><br/></p><p><br/></p></div> <div id="metqsxhb" class="inside_newsthree"> <span><a href="/article.html">返回列表</a><a href="#">返回頂部</a></span> <div class="metqsxhb" id="clear" ></div> <div> <p>上一篇 : <a href="/Article-880098.html">淺談餐飲綜合廢水處理設(shè)備的重要性</a></p> <p>下一篇 : <a href="/Article-877486.html">印染行業(yè)廢水處理基本工藝</a></p></div> </div>  </div> </div> </dd> </dl> </div> </div> <div id="metqsxhb" class="clear"></div> <footer>  <div id="metqsxhb" class="foot1"> <div id="metqsxhb" class="foot1_in clear clearfix"> <ul class="foot_nav"> <li> <div id="metqsxhb" class="tlt">關(guān)于我們</div> <a href="/aboutus.html">關(guān)于我們</a> <a 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