酸碱调节对混合污泥中有机质溶出的影响  

Impact of Adjusting Mixed Sludge with Acid and Alkali on Dissolution of Organic Matter

作　　者：苑宏英[1,2] 宋建阳[1,2] 吴丽杰[1,2] 牛四芳[1,2] 

机构地区：[1]天津城建大学环境与市政工程学院,天津300384 [2]天津市水质科学与技术重点实验室,天津300384

出　　处：《中国给水排水》2013年第19期113-116,共4页China Water & Wastewater

基　　金：天津市滨海新区科技计划项目(2011-BH14003);天津市水质科学与技术重点实验室开放研究基金资助项目(TJKLAST-2011-11)

摘　　要：以初沉污泥和剩余污泥组成的混合污泥为研究对象,将pH值分别控制在酸性(pH值=3.0)和碱性(pH值=10.0),研究了混合污泥水解酸化过程中有机质的释放规律。结果表明,与酸性条件相比,碱性条件更有利于混合污泥中各有机质组分的释放,且碱性调节还能缩短反应时间。VFAs的变化规律与其他有机质不一致,酸性条件下几乎不产生VFAs,而在碱性条件下VFAs的释放量较大且几乎呈线性增长,反应至16 d时VFAs的释放量达到最大,为224.15 mg/gVS,此时VFAs在SCOD中所占的比例最高,为58.94%。The release of the organic matter during the hydrolysis and acidification of mixed sludge, composed of primary sludge and excess sludge, was investigated by controlling pH at an acidic level （pH = 3. 0） and an alkaline level （pH = 10.0）. The results showed that compared to acidic conditions, alkaline conditions were more conducive to the release of various organic components in the mixed sludge, and alkaline regulation could also reduce the reaetion time. The variation of VFAs was different to that of other organic matters. Almost no VFAs were produced under acidic conditions, while the release of VFAs was larger and increased almost linearly under alkaline conditions, with the release reac- hing maximum at 224. 15 mg/gVS on the 16th day. VFAs were the largest component in SCOD with 58.94%.

关 键 词：酸碱调节 混合污泥 碳水化合物 蛋白质 挥发性脂肪酸 

分 类 号：X703[环境科学与工程—环境工程]