热水解预处理改善污泥的厌氧消化性能  

Enhancement of Sewage Sludge Anaerobic Digestibility by Thermal Hydrolysis Pretreatment

作　　者：王治军[1] 王伟[1] 

机构地区：[1]清华大学环境科学与工程系,北京100084

出　　处：《环境科学》2005年第1期68-71,共4页Environmental Science

基　　金：国家高技术研究发展计划 (863 )项目 (2 0 0 2AA64 40 10 )

摘　　要：先将污泥进行热水解预处理 ,其后测定生物化学甲烷势 (BMP)来研究热水解对污泥厌氧消化性能的影响 .结果表明 ,热水解预处理能加速污泥中固体有机物的溶解 ,溶解后的有机物进一步水解生成低分子物质 ,其中挥发性有机酸占溶解性COD(SCOD)的 30 %～ 4 0 % ,从而污泥的厌氧消化性能得到明显改善 .最合适的热水解温度和热水解时间为 170℃、30min .此条件下 ,污泥厌氧消化时总COD(TCOD)去除率从预处理前的 38 11%提高到 5 6 78% ,污泥中TCOD的沼气产率从 16 0mL/g提高到 2 5 0mL/g .Biochemical methane potential (BMP) experiments of thermo-hydrolyzed sewage sludge are carried out to investigate the effects of thermal hydrolysis on the digestibility of sewage sludge. The results show that thermal hydrolysis pretreatment can facilitate the dissolving of organic solid in sludge, and soluble organics hydrolyzed into low molecular organics, in which volatile fat acids accounted for 30%～40% of soluble COD, so the digestibility of sewage sludge remarkably improved. The optimum pretreatment temperature and holding time were 170℃ and 30 minutes, under which the total COD removal rate enhanced from original 38.11% to 56.78%, and biogas production rate of COD in feeding sludge from 160mL/g to 250mL/g.

关 键 词：污泥 热水解 生物化学甲烷势 消化性能 厌氧消化 

分 类 号：X703[环境科学与工程—环境工程]