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机构地区:[1]北京工业大学,北京市水质科学与水环境恢复工程重点实验室,北京市污水脱氮除磷处理与过程控制工程技术研究中心,北京100124
出 处:《中国环境科学》2014年第9期2252-2258,共7页China Environmental Science
基 金:国家自然科学基金(51178007)
摘 要:控制温度35℃,在典型pH值条件下(酸性5.0,碱性9.0)对比研究了NO2-对剩余污泥水解酸化性能的影响.结果表明:投加亚硝酸盐促进了剩余污泥的水解,提高了总可溶性COD(SCOD)产量,且随着时间的进行,酸性时比碱性时水解程度更高,到第28d时,总SCOD浓度由高到低依次为B1(pH=5且加NO2-),B2(pH=9且加NO2-),B4(pH=9且未加NO2-),B3(pH=5且未加NO2-);B1,B2,B3和B4中总挥发性脂肪酸(TVFAs)最高浓度分别为4476,4303,1350和2921mg/L,表明亚硝酸盐同样增强了污泥的酸化程度,并且酸性条件时促进作用更大.除此之外,酸性且投加NO2-的条件可以有效减少氨氮的释放.Effect of NO2^-on waste activated sludge waste activated sludge (WAS) hydrolysis and acidification at pH 5.0 and 9.0 with 35℃temperature was investigated. The result indicated that WAS hydrolysis with nitrite addition was enhanced accompanied by the increment of total SCOD and acidic condition was better than alkaline condition for hydrolysis with the increase of time. On the 28th day, the order of total SCOD was B1 (pH=5with NO2^-addition)〉B2 (pH=9with NO2^- addition) 〉 B4 (pH=9without NO2- addition) 〉B3 (pH=5without NO2^- addition). The maximum total volatile fatty acids (TVFAs) in B1, B2, B3, B4 were 4476, 4303, 1350and 2921mg/L, which indicated that acidification was also improved with nitrite addition, and the effect was better at acidic condition. Moreover, the released ammonia nitrogen was decreased significantly under nitrite-added and acidic condition.
分 类 号:X703[环境科学与工程—环境工程]
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