【摘要】 对比考察了二价铁(Fe²⁺)、零价铁（ZVI）、超声波（US）3种活化方式对过硫酸盐(S₂O₈^2-)预处理剩余污泥的溶胞性能,并研究其对污泥厌氧发酵产酸进程的促进效能.结果表明,相对比未预处理污泥,S₂O₈^2-能够明显促进剩余污泥溶胞和发酵产酸进程;同时,活化后的S₂O₈^2-预处理效果明显优于未活化预处理实验组,其中S₂O₈^2-+Fe²⁺预处理体系的促进作用最为明显.Fe²⁺、ZVI和US活化S₂O₈^2-的3组溶胞率分别为42.6%、36.5%和32.9%,相比未活化实验组（22.3%）提高了10.6%～20.3%;3组活化体系最大挥发酸浓度分别为8052,6613,4996mg COD/L,而未活化组仅为3296mg COD/L.此外,不同方式活化S₂O₈^2-预处理对溶解性有机物溶出及挥发酸组分分布也有一定影响.从环境和经济角度来看,S₂O₈^2-+Fe²⁺体系对促进污泥发酵进程具有更大意义.更多还原

【Abstract】 Persulfate(S₂O₈^2-)and its activations were investigated,including ferrous(Fe²⁺),zero-valent iron（ZVI）and ultrasonic（US）,on waste activated sludge（WAS）disintegration and acidification.Experimental results showed that S₂O₈^2-effectively disintegrated WAS flocs matrix and further enhanced short-chain fatty acids（SCFAs）production,compared with that obtained from un-pretreated WAS.In addition,activated S₂O₈^2-presented better WAS hydrolysis and acidification performance over un-activated S₂O₈^2-test.The lysis rates of Fe²⁺,ZVI and US activated S₂O₈^2-groups reached to 42.6%,36.5%and 32.9%,respectively,which were about 10.6%～20.3%higher than that obtained in the non-activated test（22.3%）.The maximum SCFAs concentration in the aforementioned three activated tests were 8052,6613,4996mg COD/L,respectively,while that was only 3296mg COD/L in non-activated test.Furthermore,the release of organics and the distribution of generated SCFAs were also affected by S₂O₈^2-activations.From the environmental and economic perspective,the S₂O₈^2-+Fe²⁺system played more significant role for enhancing the SCFAs recovery from WAS fermentation.更多还原