摘要
高盐Fenton氧化后产生的氢氧化铁污泥粒度较小,很难通过粗过滤(板框压滤)的方式进行去除。本研究采用聚丙烯酰胺(PAM)对该污泥进行了絮凝和脱水进行中试脱水实验。经过化学絮凝后,污泥的粒径明显增加。PAM絮凝效果显著依赖于溶液的pH,当pH超过10后PAM的絮凝效果变差或失去效用。此外,经过PAM絮凝后,污泥比阻大幅降低,过滤速率明显提高。因此,采用PAM絮凝作为板框粗过滤的预处理技术是可行的。
Fe（OH）3 sludge produced from Fenton treatment of hypersaline wastewater is highly tiny and very difficult to be removed by plate-frame filter press （PFFP）. The effects of PAM addition on sludge flocculation and dewatering properties were investigated in this study. The sludge particle size increased significantly after PAM flocculation, but this effect was strongly dependent on solution pH, and the PAM lose its function as the pH of solution was increased to above 10. In addition, SRF also reduced after PAM flocculation, and the filtration rate was strongly enhanced. Thus, it is feasible to use PAM flocculation as pretreatment of PFFE
出处
《广东化工》
CAS
2013年第12期135-136,共2页
Guangdong Chemical Industry
关键词
高盐废水
Fenton污泥
絮凝
脱水
hypersalinewastewater
Fenton sludge
flocculation
dewatering
