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src="/js/Common.js" ></script> <script type="text/javascript" >IsExitMTSPFollow()</script> </div> <div class="newsContent"> <p><span style="font-size:18px"><span style="font-family:黑体">简介:造纸废水属于难处理废水,并且会产生造纸黑液,黑液中含有木质素、纤维素、挥发性有机酸等,有臭味,污染性很强。<br />来源:造纸工业使用木材、稻草、芦苇、破布等为原料,经高温高压蒸煮而分离出纤维素,制成纸浆。在生产过程中,zui后排出原料中的非纤维素部分成为造纸黑液。黑液中含有木质素、纤维素、挥发性有机酸等,有臭味,污染性很强。造纸工业废水是一种水量大、se度高、悬浮物含量大、有机物浓度高、成分复杂的难处理有机废水。</span></span></p><p><span style="font-size:18px"><span style="font-family:黑体"><img alt="" src="https://img48.hbzhan.com/9/20180112/636513680919520595597.jpg" style="height:800px; width:600px" />造纸废水特点<br />造纸废水危害很da,其中黑水是危害zuida的,它所含的污染物占到了造纸工业污染排放总量的90%以上,由于黑水碱性大、颜se深、臭味重、泡沫多,并da量消耗水中溶解氧,严重地污染水源,给环境和人类健康带来危害。而中段水对环境污染zui严重的是漂白过程中产生的含氯废水,例如氯化漂白废水,次氯酸盐漂白废水等。此外,漂白废液中含有毒性强的致癌物质二恶英,也对生态环境和人体健康造成了严重威胁。<br />造纸废水分类<br />制浆造纸废水的成分很复杂,其组分不仅取决于纸浆的方法,也取决于所产品种和原料种类等多种因素。<br />制浆造纸废水da致可分为:制浆蒸煮液、洗涤废水、漂白废水和纸机白水等。碱法纸浆蒸煮废液,又称“黑液”,是制浆厂的主要污染源。<br />造纸废水主要成分<br />制浆造纸废水的成分很复杂,其组分不仅取决于纸浆的方法,也取决于所产品种和原料种类等多种因素。<br />造纸工业废水中的悬浮物质主要来自备料工段的树皮、草屑、泥沙以及随水排放的炉灰、矿渣、制浆造纸各工序流失的纤维、填料等;废水中BOD主要来源于制浆蒸煮工序,如纤维素分解生成的糖类、醇类、有机酸等。<br />在化学浆中,蒸煮废液的BOD5发生量占80%以上;废水中的COD和着se物质主要来源于制浆蒸煮工序的木素及其衍生物;废水中的有毒物质主要有蒸煮废液中的粗硫酸盐皂、漂白废水中的有机氯化物(如二氯苯酚、氯邻苯二酚等),还有微量的汞、酚等,但通常这些有毒物质的含量甚微,其中关于漂白废水中的有机氯化物的毒性和“三致”作用,在发达国家中已引起越来越da的关注。污水处理:造纸废水处理</span></span></p><p><span style="font-family:黑体; font-size:18px">造纸废水处理方法</span><span style="font-size:18px"><span style="font-family:黑体"><img alt="" src="https://img50.hbzhan.com/9/20180112/636513681335115251569.jpg" style="height:800px; width:600px" /></span></span></p><p><span style="font-size:18px"><span style="font-family:黑体">物理化学方法:<br />在造纸废水的深度处理中,物理化学法具有治理快、处理效果好等优点,一般采用的方法包括:氧化法、絮凝沉淀法、膜分离法、吸附法等。<br />1、氧化法<br />氧化法(AdvancedOxidationProcesses简称AOPs)又称深度氧化技术,是20世纪80年代发展起来的一种用于处理难降解有机污染物的新技术。在氧化剂、电、声、光辐照、催化剂等作用下产生氧化能力强(其电位2.80V,仅次于氟的2.87V的[-OH]再通过[-OH]与有机化合物间的加成、取代、电子转移、断键、开环等作用,使废水中难降解的da分子有机物氧化降解成低毒或无毒的小分子物质,甚至直接分解成为CO:和H:O,达到无害化的目的。<br />该技术具有反应速度快、处理效率高、对有毒污染物破坏*、无二次污染、适用范围广、易操作等优点,并被广泛应用于有毒难降解的工业废水如制药、精细化工、印染等有机废水的处理中,已经逐渐成为难降解废水处理研究的热点。<br />根据产生自由基的方式和反应条件的不同,可将其分为Fenton氧化法、超临界水氧化法、光催化氧化法、超声氧化法、电催化氧化法、臭氧氧化法和湿式氧化法等。</span></span></p><p><span style="font-size:18px"><span style="font-family:黑体"><img alt="" src="https://img48.hbzhan.com/9/20180112/636513681615454439452.jpg" style="height:450px; width:600px" /><br />2、絮凝沉淀法<br />絮凝沉淀法是由絮凝剂形成的聚合产物,通过一系列作用,对水中悬浮、胶状的大分子质量污染物去除的方法。对于制浆造纸废水的三处理,此法已有广泛应用。在运行条件下,用絮凝-电浮选连续处理造纸废水,废水的CODcr可从1416mg/L降至48.9mg/L。<br />3、膜分离法<br />膜分离法是用一种特殊的半透膜将溶质和溶剂分隔开,使一侧溶液中的某种溶质透过膜或者溶剂渗透出来,从而达到分离溶剂的目的。<br />采用传统的两相厌氧工艺(BS)与膜分离技术相结合的系统(MBS)处理造纸黑液配置废水,结果表明,系统COD去除率可以达到73.1,高于BS系统(48.6%),且在厌氧污泥活性及运行稳定性方面优于BS系统;在COD负荷为6kg-(m3-d)-1时MBS酸化率为20.1%,酸化水平为7.5%,略优于BS系统(分别为7.0%和5.0%)。<br />4、化学法<br />化学法是通过投加特定的化学药剂(如美卡诺COD降解剂),达到降低污染物指标的一种专业药剂,此药剂具有去除率高,反应速度快,用量少、易添加、使用方便且无二次污染的环保产品,末端投加后可直接排放。【使用】<br />污水处理:造纸废水处理</span></span></p><p><span style="font-size:18px"><span style="font-family:黑体">COD降解剂集合了氧化、反应沉降、吸附等技术,能将污水中的COD 等污染物从水中快速去除,只需2-3分钟反应时间,是废水COD超标的药剂。<br />适用于任何COD废水的处理。是专门针对各行业废水中可溶性COD难去除而特别研发的新型化学药剂,对COD的去除有明显的效果,配合本司的其他产品使用,效果更佳,保证COD稳定达到国家排放标准。</span></span></p><p><span style="font-size:18px"><span style="font-family:黑体"><img alt="" src="https://img50.hbzhan.com/9/20180112/636513681874421079880.jpg" style="height:338px; width:600px" /></span></span></p> </div> <div class="news-keyword" style="margin-bottom:20px; font-size:16px; font-family:microsoft yahei;" >关键词:<a href="https://www.hbzhan.com/chanpin-7795.html" target="_blank" style="color: #891e2a;text-decoration: underline;margin-right: 10px;">催化剂 </a><a href="https://www.hbzhan.com/chanpin-7796.html" target="_blank" style="color: #891e2a;text-decoration: underline;margin-right: 10px;">絮凝剂 </a></div> <div class="nextNews" style="font-size: 16px; color: #666;"> <p>上一篇:<a style="color: #168de3;" href="https://www.hbzhan.com/tech_news/detail/419536.html" target="_blank">工厂污水储存罐 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