15966648960
來源:發布時(shi)間:2020-11-27 點擊率:
果(guo)(guo)汁是我(wo)們(men)生(sheng)活中常見(jian)的飲料,但是果(guo)(guo)汁在(zai)(zai)生(sheng)產過程中會產生(sheng)大(da)量(liang)(liang)的有(you)(you)機(ji)廢(fei)(fei)(fei)(fei)(fei)水,廢(fei)(fei)(fei)(fei)(fei)水中含有(you)(you)糖(tang)(tang)、有(you)(you)機(ji)酸(suan)(suan)、果(guo)(guo)膠、酸(suan)(suan)、堿等(deng)(deng)有(you)(you)機(ji)物,果(guo)(guo)汁廢(fei)(fei)(fei)(fei)(fei)水來(lai)源(yuan)于水果(guo)(guo)的清(qing)洗、粉碎、榨汁等(deng)(deng)工(gong)序,以(yi)及罐(guan)裝過程中的洗瓶、殺菌、破瓶損耗、地(di)面清(qing)洗等(deng)(deng)環節。廢(fei)(fei)(fei)(fei)(fei)水中含有(you)(you)高濃度的糖(tang)(tang)、果(guo)(guo)膠、果(guo)(guo)渣和(he)水溶性物質(zhi)、纖維素(su)、果(guo)(guo)酸(suan)(suan)、單寧(ning)、礦物鹽等(deng)(deng)。并(bing)且廢(fei)(fei)(fei)(fei)(fei)水中含有(you)(you)大(da)量(liang)(liang)有(you)(you)機(ji)酸(suan)(suan),未經處理直接排放,會造成嚴重的環境污染(ran)。果(guo)(guo)汁廢(fei)(fei)(fei)(fei)(fei)水中的主(zhu)要糖(tang)(tang)類為果(guo)(guo)糖(tang)(tang)、葡(pu)萄(tao)糖(tang)(tang)和(he)蔗(zhe)糖(tang)(tang),其三者比例為2:1:1。不同生(sheng)產工(gong)藝階段產生(sheng)的廢(fei)(fei)(fei)(fei)(fei)水具有(you)(you)不同的特點。即使在(zai)(zai)同一階段,由于產品的不同,廢(fei)(fei)(fei)(fei)(fei)水的質(zhi)量(liang)(liang)也有(you)(you)很大(da)的差異。隨著我(wo)國環保事(shi)業的推進(jin),環境保護越(yue)來(lai)越(yue)嚴格(ge),果(guo)(guo)品罐(guan)頭(tou)廢(fei)(fei)(fei)(fei)(fei)水的處理迫在(zai)(zai)眉睫。聚丙烯酰胺在水(shui)果罐頭廢水(shui)處(chu)理(li)中起著重要(yao)作用。下(xia)面中(zhong)北化(hua)工詳細為大(da)家解答果汁(zhi)罐頭廠用聚丙烯酰胺的作用。
一般來說(shuo),果汁廢(fei)水(shui)(shui)(shui)的(de)(de)(de)處(chu)(chu)理(li)包(bao)括好(hao)氧(yang)處(chu)(chu)理(li)工(gong)(gong)(gong)(gong)藝(yi)、SBR工(gong)(gong)(gong)(gong)藝(yi)、CASS工(gong)(gong)(gong)(gong)藝(yi)、水(shui)(shui)(shui)解(jie)-好(hao)氧(yang)處(chu)(chu)理(li)工(gong)(gong)(gong)(gong)藝(yi)、水(shui)(shui)(shui)解(jie)-好(hao)氧(yang)處(chu)(chu)理(li)工(gong)(gong)(gong)(gong)藝(yi)、水(shui)(shui)(shui)解(jie)-酸化-接觸氧(yang)化組合工(gong)(gong)(gong)(gong)藝(yi)等(deng),這些工(gong)(gong)(gong)(gong)藝(yi)中使用的(de)(de)(de)藥劑主要(yao)有聚(ju)(ju)(ju)丙烯(xi)酰胺、聚(ju)(ju)(ju)合氯(lv)化鋁等(deng),聚(ju)(ju)(ju)合氯(lv)化鋁鐵(tie)等(deng)水(shui)(shui)(shui)處(chu)(chu)理(li)劑。由于果汁廢(fei)水(shui)(shui)(shui)大(da)多呈酸性,需要(yao)對廢(fei)水(shui)(shui)(shui)的(de)(de)(de)pH值進(jin)行(xing)調(diao)(diao)節。調(diao)(diao)整后的(de)(de)(de)聚(ju)(ju)(ju)丙烯(xi)酰胺可直接用于初步絮凝(ning)沉淀(dian),大(da)部(bu)分有機物和(he)懸(xuan)浮物可沉降下(xia)來,然后再進(jin)行(xing)深度凈化處(chu)(chu)理(li)。在(zai)(zai)其它處(chu)(chu)理(li)工(gong)(gong)(gong)(gong)藝(yi)中,也有先進(jin)行(xing)前期(qi)預處(chu)(chu)理(li),再進(jin)行(xing)絮凝(ning)沉淀(dian)。此時選擇的(de)(de)(de)多為陰離子(zi)聚(ju)(ju)(ju)丙烯(xi)酰胺和(he)聚(ju)(ju)(ju)合氯(lv)化鋁。污(wu)(wu)水(shui)(shui)(shui)后期(qi)完全處(chu)(chu)理(li)后,在(zai)(zai)處(chu)(chu)理(li)沉淀(dian)池底部(bu)污(wu)(wu)泥時,可加入(ru)陽離子(zi)聚(ju)(ju)(ju)丙烯(xi)酰胺對污(wu)(wu)泥進(jin)行(xing)脫水(shui)(shui)(shui)。脫水(shui)(shui)(shui)后的(de)(de)(de)干泥餅可銷往化肥廠(chang)、化肥廠(chang)、飼料(liao)廠(chang)等(deng)地增加收入(ru),而達標(biao)的(de)(de)(de)廢(fei)水(shui)(shui)(shui)可用于灌(guan)溉、工(gong)(gong)(gong)(gong)業(ye)用水(shui)(shui)(shui)等(deng)。
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