印染废水(shui)(shui)的(de)(de)(de)(de)处理(li)(li)工(gong)(gong)艺(yi),充分(fen)(fen)(fen)的(de)(de)(de)(de)调节时间是必要(yao)(yao)的(de)(de)(de)(de),物(wu)化、生(sheng)(sheng)化相结合的(de)(de)(de)(de)处理(li)(li)工(gong)(gong)艺(yi)是目前(qian)采(cai)用(yong)(yong)的(de)(de)(de)(de)合理(li)(li)工(gong)(gong)艺(yi)。物(wu)化法主要(yao)(yao)用(yong)(yong)于(yu)去除(chu)悬浮物(wu)、色度(du)及部(bu)分(fen)(fen)(fen)COD,投(tou)药混凝反应是物(wu)化处理(li)(li)的(de)(de)(de)(de)重要(yao)(yao)环节,分(fen)(fen)(fen)离(li)工(gong)(gong)艺(yi)气浮法具有突出(chu)(chu)的(de)(de)(de)(de)优(you)点(dian)(dian)(dian),生(sheng)(sheng)化法主要(yao)(yao)采(cai)用(yong)(yong)厌(yan)氧水(shui)(shui)解(jie)(jie)(jie)-好(hao)氧氧化串联工(gong)(gong)艺(yi),厌(yan)氧水(shui)(shui)解(jie)(jie)(jie)工(gong)(gong)艺(yi)是解(jie)(jie)(jie)决印染废水(shui)(shui)COD值高、可生(sheng)(sheng)化性差及色度(du)高的(de)(de)(de)(de)难题的(de)(de)(de)(de)有效(xiao)前(qian)置技(ji)术,经厌(yan)氧水(shui)(shui)解(jie)(jie)(jie)后大(da)部(bu)分(fen)(fen)(fen)难降(jiang)解(jie)(jie)(jie)有机(ji)物(wu)已被(bei)分(fen)(fen)(fen)解(jie)(jie)(jie)为易(yi)生(sheng)(sheng)物(wu)降(jiang)解(jie)(jie)(jie)小分(fen)(fen)(fen)子有机(ji)物(wu),可以提高废水(shui)(shui)可生(sheng)(sheng)化性,保(bao)障废水(shui)(shui)好(hao)氧生(sheng)(sheng)物(wu)处理(li)(li)的(de)(de)(de)(de)效(xiao)率和出(chu)(chu)水(shui)(shui)水(shui)(shui)质。好(hao)氧氧化工(gong)(gong)艺(yi)有多种方(fang)(fang)式,如氧化沟、间歇(xie)式活性污泥法、生(sheng)(sheng)物(wu)接触氧化等,后者由于(yu)易(yi)于(yu)管理(li)(li)、产(chan)泥量(liang)少、污泥不(bu)易(yi)发生(sheng)(sheng)膨胀现象及运(yun)行成本低等特点(dian)(dian)(dian),是目前(qian)小型印染废水(shui)(shui)常用(yong)(yong)的(de)(de)(de)(de)好(hao)氧生(sheng)(sheng)物(wu)处理(li)(li)方(fang)(fang)法之一,但各(ge)个(ge)印染企业选用(yong)(yong)好(hao)氧方(fang)(fang)法时应根据本身(shen)废水(shui)(shui)的(de)(de)(de)(de)特点(dian)(dian)(dian)做出(chu)(chu)优(you)选,必要(yao)(yao)时尽可能采(cai)取综合治理(li)(li)技(ji)术。下面列(lie)举几种典型流程
1.水解酸化-生物接触氧化-生物炭印染废水处理工艺
处理(li)印染(ran)(ran)废水(shui)(shui)(shui)(shui)(shui)通(tong)常采(cai)用(yong)水(shui)(shui)(shui)(shui)(shui)解(jie)(jie)酸(suan)化(hua)(hua)(hua)(hua)(hua)-生(sheng)(sheng)(sheng)(sheng)物(wu)(wu)(wu)(wu)(wu)(wu)(wu)(wu)接触(chu)氧(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)(hua)-生(sheng)(sheng)(sheng)(sheng)物(wu)(wu)(wu)(wu)(wu)(wu)(wu)(wu)炭(tan)(tan)为主的(de)处理(li)工艺,见图3-1。该处理(li)工艺是近几年来在(zai)印染(ran)(ran)废水(shui)(shui)(shui)(shui)(shui)处理(li)中采(cai)用(yong)较(jiao)多、较(jiao)成(cheng)熟的(de)工艺流(liu)程(cheng)。水(shui)(shui)(shui)(shui)(shui)解(jie)(jie)酸(suan)化(hua)(hua)(hua)(hua)(hua)的(de)目的(de)是对印染(ran)(ran)废水(shui)(shui)(shui)(shui)(shui)中可(ke)生(sheng)(sheng)(sheng)(sheng)化(hua)(hua)(hua)(hua)(hua)性(xing)(xing)很差的(de)某(mou)些高分子(zi)物(wu)(wu)(wu)(wu)(wu)(wu)(wu)(wu)质(zhi)和(he)(he)不(bu)溶性(xing)(xing)物(wu)(wu)(wu)(wu)(wu)(wu)(wu)(wu)质(zhi)通(tong)过水(shui)(shui)(shui)(shui)(shui)解(jie)(jie)酸(suan)化(hua)(hua)(hua)(hua)(hua),降解(jie)(jie)为小分子(zi)物(wu)(wu)(wu)(wu)(wu)(wu)(wu)(wu)质(zhi)和(he)(he)可(ke)溶性(xing)(xing)物(wu)(wu)(wu)(wu)(wu)(wu)(wu)(wu)质(zhi),提高可(ke)生(sheng)(sheng)(sheng)(sheng)化(hua)(hua)(hua)(hua)(hua)性(xing)(xing)和(he)(he)B/C。值,为后(hou)续(xu)好氧(yang)(yang)(yang)(yang)生(sheng)(sheng)(sheng)(sheng)化(hua)(hua)(hua)(hua)(hua)处理(li)创造条(tiao)件。同时好氧(yang)(yang)(yang)(yang)生(sheng)(sheng)(sheng)(sheng)化(hua)(hua)(hua)(hua)(hua)处理(li)产生(sheng)(sheng)(sheng)(sheng)的(de)剩(sheng)余(yu)污(wu)泥(ni)经沉淀池(chi)(chi)全(quan)部(bu)回流(liu)到(dao)厌氧(yang)(yang)(yang)(yang)生(sheng)(sheng)(sheng)(sheng)化(hua)(hua)(hua)(hua)(hua)段,进行(xing)厌氧(yang)(yang)(yang)(yang)消化(hua)(hua)(hua)(hua)(hua),减少整个系统剩(sheng)余(yu)污(wu)泥(ni)排放(fang),即达到(dao)自身的(de)污(wu)泥(ni)平衡。厌氧(yang)(yang)(yang)(yang)水(shui)(shui)(shui)(shui)(shui)解(jie)(jie)酸(suan)化(hua)(hua)(hua)(hua)(hua)池(chi)(chi)和(he)(he)生(sheng)(sheng)(sheng)(sheng)物(wu)(wu)(wu)(wu)(wu)(wu)(wu)(wu)接触(chu)氧(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)(hua)池(chi)(chi)中均安装填料,属生(sheng)(sheng)(sheng)(sheng)物(wu)(wu)(wu)(wu)(wu)(wu)(wu)(wu)膜法(fa)处理(li);生(sheng)(sheng)(sheng)(sheng)物(wu)(wu)(wu)(wu)(wu)(wu)(wu)(wu)炭(tan)(tan)池(chi)(chi)装活性(xing)(xing)炭(tan)(tan)并供(gong)氧(yang)(yang)(yang)(yang),兼有悬浮(fu)生(sheng)(sheng)(sheng)(sheng)长(zhang)和(he)(he)附着生(sheng)(sheng)(sheng)(sheng)长(zhang)法(fa)特点(dian);脉(mai)冲进水(shui)(shui)(shui)(shui)(shui)的(de)作用(yong)是对厌氧(yang)(yang)(yang)(yang)水(shui)(shui)(shui)(shui)(shui)解(jie)(jie)酸(suan)化(hua)(hua)(hua)(hua)(hua)池(chi)(chi)进行(xing)搅拌。各部(bu)分的(de)水(shui)(shui)(shui)(shui)(shui)力(li)停留时间(jian)一般如下。调节(jie)池(chi)(chi):8~12h;厌氧(yang)(yang)(yang)(yang)水(shui)(shui)(shui)(shui)(shui)解(jie)(jie)酸(suan)化(hua)(hua)(hua)(hua)(hua)池(chi)(chi):8~10h;生(sheng)(sheng)(sheng)(sheng)物(wu)(wu)(wu)(wu)(wu)(wu)(wu)(wu)接触(chu)氧(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)(hua)池(chi)(chi):6~8h;生(sheng)(sheng)(sheng)(sheng)物(wu)(wu)(wu)(wu)(wu)(wu)(wu)(wu)炭(tan)(tan)池(chi)(chi):1~2h;脉(mai)冲发(fa)生(sheng)(sheng)(sheng)(sheng)器(qi)间(jian)隔时间(jian):5~10min。
该(gai)处(chu)理(li)工艺系统(tong),对于CODcr≤1000mg/L的印染废水(shui),处(chu)理(li)后(hou)的出水(shui)可(ke)达(da)到(dao)国(guo)家(jia)排放标准,如进一步(bu)深度处(chu)理(li)则可(ke)回用(yong)。
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