摘要
比较了石英砂和陶粒滤料蚯蚓生物滤池的污泥减量化效果。结果表明，当水力负荷为2．4—6．7m^3／（m^2·d）时两种滤池均可实现污泥的减量化和稳定化。陶粒蚯蚓生物滤池的污泥减量率和VSS减量率分别达到了40．5％～48．2％和52．9％～65．6％。其污泥减量化和稳定化效果均优于石英砂蚯蚓生物滤池。蚯蚓生物滤池处理污泥的过程也是蚯蚓在滤料中活动生长的过程，滤料为蚯蚓提供的生长环境直接影响滤池对污泥处理效果的优劣。扫描电镜分析表明，在陶粒滤料中蚯蚓体壁的角质层、表皮层及环肌层所受到的损伤程度都要比在石英砂中的小。对蚯蚓超氧化物歧化酶（SOD）活性的测定结果显示：在各工况下，生长在陶粒滤层中蚯蚓的SOD活性均显著低于石英砂滤层中蚯蚓的SOD活性。因此陶粒的物化性质更能满足蚯蚓生长活动的需要，使蚯蚓发挥更大功效。
Sludge reduction performance by earthworm biofilters using quartz sand and ceramsite as media was compared. The results show that when the hydraulic loading varies from 2.4 to 6.7 m^3/（ m^2 ·d）, the sludge reduction and stabilization can be realized with both filter media. The sludge and VSS reduction rates in earthworm biofilter with ceramsite are 40.5% to 48.2% and 52.9% to 65.6% respectively, which are superior to those in earthworm biofilter with quartz sand. Sludge treatment in earthworm biofilter is realized when earthworms grow in the filter media. Therefore the living environment provided by filter media affects sludge treatment performance directly. The observation of the body wall tissue of earthworms by SEM indicates that the injured cuticle, epidermis and central muscle in ceramsite media are slighter than those in quartz sand. The effect of filter media on superoxide dismutase （SOD） activity of earthworm was also investigated, and the results show that the SOD activity of earthworm in ceramsite media is chemical Key ramsite significantly lower than that in quartz sand under any working condition. Therefore, the physico- character of ceramsite better meets the requirement for physiological activities of earthworms.
出处
《中国给水排水》
CAS
CSCD
北大核心
2008年第7期12-15,共4页
China Water & Wastewater
基金
国家高技术研究发展计划(863)项目(2003AA601020)
关键词
蚯蚓生物滤池
污泥减量化
污泥稳定化
石英砂
陶粒
earthworm biofilter
sludge reduction
sludge stabilization
quartz sand
ceramsite
