利用脂肪酸图谱研究液态污泥稳定化蚯蚓生物滤池系统中蚯蚓和其他捕食者的摄食行为和营养关系。
Feeding behavior and trophic relationship of earthworms and other predators in vermifiltration system for liquid-state sludge stabilization using fatty acid profiles.
机构信息
The Institute of Biofilm Technology, State Key Laboratory of Pollution Control and Resources Reuse, Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
The Institute of Biofilm Technology, State Key Laboratory of Pollution Control and Resources Reuse, Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
出版信息
Bioresour Technol. 2014 Oct;169:149-154. doi: 10.1016/j.biortech.2014.06.083. Epub 2014 Jul 1.
The sludge reduction capability (VSS reduction) of vermifilter (VF) was 14.7% higher than that of conventional biofilter (BF) due to the fact that there was a net loss of biomass and energy when the food web in VF is extended. Therefore, feeding behavior and trophic relationship of earthworms and other predators (leeches, lymnaeidaes and limaxes) in VF were investigated using fatty acid (FA) profiles for the first time. Compared with BF biofilm, microbial community structure of VF biofilm got optimized by earthworms that the percentage of protozoa increased from 14.2% to 20.4%. Furthermore, analysis of specific microbial FAs composition in each predator suggested different trophic level of predators resulted from their selective ingestion of different microorganisms, and earthworms were at the second high trophic level in VF food web. Overall findings indicated earthworms modified microbial community and extended the food web of VF and thus enhanced the sludge reduction.
由于在扩展VF 食物网时会有生物量和能量的净损失，因此，VF 的污泥减量能力（VSS 减少）比传统生物滤池（BF）高 14.7%。因此，首次使用脂肪酸（FA）谱研究了 VF 中蚯蚓和其他捕食者（水蛭、扁卷螺和蛞蝓）的摄食行为和营养关系。与 BF 生物膜相比，VF 生物膜中的微生物群落结构得到了优化，原生动物的比例从 14.2%增加到 20.4%。此外，对每个捕食者的特定微生物 FA 组成的分析表明，捕食者的不同营养级是由于它们选择性地摄取不同的微生物造成的，而蚯蚓在 VF 食物网中处于第二高的营养级。总体研究结果表明，蚯蚓改变了微生物群落并扩展了 VF 的食物网，从而增强了污泥的减少。
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