复合絮凝剂处理烷基苯磺酸盐废水研究

Treatment of Alkylbenzene Sulfonate Wastewater by the Complex Flocculant

水样分析可知 :废水中含烷基苯磺酸盐的有机物含量和油含量较高 ,废水外观呈乳白色 ,油水乳化现象严重 ,废水具有较高的胶体稳定性 ,且废水排放不均匀 ;说明此种废水如不进行预处理或均质化 ,将会给后续的生化处理带来较大的冲击。此废水中的BOD5/COD的比值为 0 .38,说明此废水的生物降解性尚可。系统地研究了聚合氯化铝、阴离子化聚丙烯酰胺、PPA处理T10 5废水的絮凝效果 ,结果表明 ,在室温及中性偏酸絮凝条件下 ,选用聚合氯化铝与阴离子化的聚丙烯酰胺复配 (聚合氯化铝投加量为大于 2 0 0mg·L-1,阴离子化聚丙烯酰胺投加量在 10～ 2 0mg·L-1之间 ) ,或采用PPA与阴离子化聚丙烯酰胺复配 (但PPA投加量需大于 6 0 0mg·L-1)作为该废水处理药剂 ,从经济角度考虑 。

The analytical results of alkylbenzene sulfonate (T105) wastewater sample show that the milky white wastewater contained high concentration of organic matter and oil with serious oil/water emulsion, higher colloid stability, and unstable wastewater quality and quantity. It indicats that this kind of wastewater can impact on the later biochemical treatment process strongly if it is not pretreated and homogenized. Because of BOD 5/COD=0.38 in the T105 wastewater, it is biodegradable. The effect of polyaluminum chloride (PAC), anionic polyacrylamide (PAM) and PPA on treating T105 wastewater was researched systematically. The results show that at normal temperature and neutral or weak acidity, the flocculant used to treat T105 wastewater can be made of the composition of PAC and anionic PAM (the added amount of PAC above 200 mg·L -1 , and PAM 10～20 mg·L -1 ), or of PPA and anionic PAM (but the added amount of PPA more than 600 mg·L -1 ), so the former is economical.