CaO2应用于污泥减量的研究

摘要

This paper investigated the effects of added CaO2 on the sludge reduction and substances in the liquid phase of the sludge,such as SCOD,NH4+-N,PO43--P,soluble protein and polysaccharide. The results show that when the dosage of CaO2 is 0.1 g/gVSS,the VSS reduction rate is the largest,which can reach 20% ,while the sludge floc size is the smallest. CaO2 can degrade sludge by oxidization,which results in the rupture of sludge flocs and microbial cells and promots the release of substances such as SCOD,NH4+-N,PO43--P,soluble proteins and polysaccharides into the liquid phase of sludge. In the process of reducing sludge by CaO2,·OH plays a primary role in the oxidative decomposition of sludge,·O2-takes the second place,and 1O2 has the least effect.%通过向污泥中投加CaO2考察污泥减量效果以及对污泥液相中SCOD、NH4+-N、PO43--P、溶解性蛋白质和多糖等物质的影响.结果表明,当CaO2投加量为0.1 g/gVSS时,TSS削减率最大,可达到20%;在此投加量下,污泥絮体粒径最小. CaO2可氧化降解污泥,使污泥絮体和微生物细胞破裂,促进SCOD、NH4+-N、PO43--P、溶解性蛋白质和多糖等物质释放到污泥液相中. CaO2减量剩余污泥的过程中,氧化作用比碱解作用贡献更大,且主要是·OH对污泥的氧化分解起到作用,·O2-次之,1O2作用最小.