摘要： 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、PO₄^3--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、PO₄^3--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。

关键词: CaO₂, 污泥减量, 挥发性悬浮固体

Abstract: 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,PO₄^3--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,PO₄^3--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.

Key words: CaO₂, sludge reduction, volatile suspended solids (VSS)

中图分类号: 

• X703.1