持續創新,共創共享
1、屠宰廢水污染現狀
屠宰(zai)(zai)廢(fei)水(shui)主要來自畜牧、禽類、魚類等宰(zai)(zai)殺行業(ye)。隨著近幾十年(nian)來人民(min)生活(huo)水(shui)平的(de)提高,屠宰(zai)(zai)行業(ye)達(da)(da)到了前(qian)所(suo)未有的(de)擴大與發展,廢(fei)水(shui)排(pai)放(fang)量(liang)也不(bu)斷(duan)加大。統計顯示,我國(guo)(guo)僅宰(zai)(zai)豬行業(ye)就有1000多家,年(nian)排(pai)放(fang)廢(fei)水(shui)總量(liang)達(da)(da)3億立方米左右(you),約占(zhan)全國(guo)(guo)工(gong)業(ye)廢(fei)水(shui)排(pai)放(fang)量(liang)的(de)6%。
2、屠宰廢水特點
廢水特點如下:
廢(fei)水主(zhu)要成分有(you)動物血污、油脂(zhi)、糞便、內臟殘屑(xie)和無(wu)機鹽等。
(1)高COD,一(yi)般達到2000mg/L以上;
(2)高SS,主(zhu)要含有大量(liang)豬(zhu)鬃等(deng)懸浮物;
(3)高氨氮,動(dong)物糞(fen)水、動(dong)物蛋白質含有大量(liang)氨氮;
(4)高油脂,屠宰過程產生大量動(dong)物油脂。
3、屠宰廢水處理技術
在(zai)屠(tu)宰廢(fei)水(shui)(shui)(shui)處(chu)(chu)理(li)(li)(li)工(gong)(gong)(gong)藝(yi)(yi)中,好(hao)(hao)氧處(chu)(chu)理(li)(li)(li)和(he)厭氧處(chu)(chu)理(li)(li)(li)以及(ji)化(hua)(hua)學(xue)絮凝處(chu)(chu)理(li)(li)(li)各有其(qi)優缺點,一般在(zai)處(chu)(chu)理(li)(li)(li)較(jiao)低濃度(du)(CODcr≤1000mg/L)屠(tu)宰廢(fei)水(shui)(shui)(shui)時,可直接(jie)(jie)采用(yong)(yong)生物(wu)(wu)處(chu)(chu)理(li)(li)(li),這(zhe)樣(yang)可在(zai)保證(zheng)處(chu)(chu)理(li)(li)(li)效(xiao)果(guo)的(de)條件下,縮短處(chu)(chu)理(li)(li)(li)流(liu)程,節省(sheng)基建費用(yong)(yong);在(zai)處(chu)(chu)理(li)(li)(li)較(jiao)高(gao)濃度(du)(CODcr>1000mg/L)的(de)屠(tu)宰廢(fei)水(shui)(shui)(shui)時,幾種工(gong)(gong)(gong)藝(yi)(yi)的(de)組合使(shi)用(yong)(yong)可確保廢(fei)水(shui)(shui)(shui)處(chu)(chu)理(li)(li)(li)達(da)標。如水(shui)(shui)(shui)解好(hao)(hao)氧生物(wu)(wu)處(chu)(chu)理(li)(li)(li)工(gong)(gong)(gong)藝(yi)(yi)工(gong)(gong)(gong)程投資僅為同等規模活(huo)性污泥法(fa)(fa)的(de)70%,占地減少20%,處(chu)(chu)理(li)(li)(li)成(cheng)本降低42%。國內(nei)已(yi)使(shi)用(yong)(yong)的(de)組合工(gong)(gong)(gong)藝(yi)(yi)有:酸化(hua)(hua)-SBR工(gong)(gong)(gong)藝(yi)(yi),酸化(hua)(hua)-AB法(fa)(fa),酸化(hua)(hua)-生物(wu)(wu)接(jie)(jie)觸(chu)(chu)氧化(hua)(hua)工(gong)(gong)(gong)藝(yi)(yi),UASB-AF工(gong)(gong)(gong)藝(yi)(yi),厭氧-過濾工(gong)(gong)(gong)藝(yi)(yi),射流(liu)曝氣(qi)-生物(wu)(wu)接(jie)(jie)觸(chu)(chu)氧化(hua)(hua)工(gong)(gong)(gong)藝(yi)(yi),厭氧塘-兼(jian)氧塘-好(hao)(hao)氧塘工(gong)(gong)(gong)藝(yi)(yi),兼(jian)氧-AB法(fa)(fa),化(hua)(hua)學(xue)混凝-生物(wu)(wu)處(chu)(chu)理(li)(li)(li)工(gong)(gong)(gong)藝(yi)(yi)等。處(chu)(chu)理(li)(li)(li)工(gong)(gong)(gong)藝(yi)(yi)的(de)優化(hua)(hua)組合有利(li)于(yu)各種工(gong)(gong)(gong)藝(yi)(yi)揚長避短,保證(zheng)出(chu)水(shui)(shui)(shui)水(shui)(shui)(shui)質。
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