摘要
以颤蚓为研究对象,活性污泥为底物,通过批量培养实验,考察了颤蚓在20℃和25℃2个不同温度下的生长状况.在16周的培养过程中,颤蚓在活性污泥中的生长较好地符合Logistic曲线;25℃更适于颤蚓生长,颤蚓个体在25℃下体重和体长的增长速率分别是0.0470mg.(条.d)-1和0.1936 mm.(条.d)-1.同时,颤蚓在25℃下的体重-体长关系式为W=0.008L2.028(R2=0.8685),符合颤蚓科蠕虫体重-体长关系式的一般规律.与其它底物相比,以活性污泥为底物时的颤蚓生长并未表现出明显差别.
The growth of Tubiflcidae was investigated from juvenile to adult stage for 16 weeks by cultivating Tubiflcidae with activated sludge as substrate in batch tests at two different temperatures （20℃ and 25℃ ）, monitoring changes of body length and wet weight of Tubificidae. Results showed that the growth of Tubificidae well fit the Logistic curve. Temperature of 25 ℃ was more suitable for worm growth than of 20℃, with the growth rates of wet weight and body length of 0,0470 mg·（ind·d）^-1 and 0.1936 mm·（indvd）^-1, respectively, at 25℃. Meanwhile, the relationship between body length and wet weight of Tubificidae at 25℃ was determined as W = 0. 008 L^2.028 （ R^2 = 0. 868 5）, which was well in accordance with the common regulation concluded in previous studies. Compared with other substrates, Tubificidae showed little difference on growth when fed with activated sludge.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2008年第5期1342-1347,共6页
Environmental Science
基金
国家自然科学基金项目(5040821)
国家高技术研究发展计划(863)项目(2007AA06Z347)
关键词
活性污泥
污泥减量
颤蚓生长
activated sludge
sludge reduction
growth of Tubificidae
