摘要
以ＮａＯ·３．２ＳｉＯ＿２、Ｈ＿２ＳＯ＿４和Ａｌ＿２（ＳＯ＿４）＿３为原料，制备出高稳定活性硅酸絮凝剂ＳＰＳＡ，研究了它在污泥脱水应用中的絮凝特性。实验结果表明，向生化处理产生的剩余活性污泥中投加相对于污泥量２．０％的ＳＰＳＡ，在５×１０￣４Ｐａ真空度下过滤脱水，污泥含水率由９９．４％下降为７０．０％，污泥体积降为原体积的１／５０，燃烧热值增大５０倍，污泥比阻下降，并且所得滤液澄清，透光率高。
Stabilized Polysilicic Acid(SPSA)has been prepared by using NaO·3.2SiO_2,H_2SO_4 andAl_2(SO_4)_3.The flocculation property of SPSA in sludge dewatering was studied.The experimentalresults showed that after filtered at the vacuum of 5(10￣4 Pa,the water ratio of sludge was decreasedfrom 99.4%to 70.0%,the sludge volume reduced to 1/50,its calorific value increased by 50 times,its specific resistance reduced obviously and the filter liquor was clarified when 2.0%SPSA with respect to the weight of dried sludge was added to the sludge taken from the sewage treatment work.
出处
《环境科学研究》
EI
CAS
CSCD
1995年第6期32-36,共5页
Research of Environmental Sciences
