State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
Water Res. 2010 Apr;44(8):2572-82. doi: 10.1016/j.watres.2010.01.011. Epub 2010 Jan 22.
The performance of a conventional biofilter (BF) and a vermifilter containing the earthworm, Eisenia foetida, (VF) for the treatment of domestic wastewater sludge were compared with the earthworm-microorganism interaction mechanisms involved in sludge stabilization. The results revealed that the presence of earthworms in the VF led to significant stabilization of the sludge by enhancing the reduction in volatile suspended solids (VSS) by 25.1%. Digestion by earthworms and the earthworm-microorganism interactions were responsible for 54% and 46% of this increase, respectively. Specifically, earthworms in the VF were capable of transforming insoluble organic materials to a soluble form and then selectively digesting the sludge particles of 10-200 microm to finer particles of 0-2 microm, which led to the further degradation of organic materials by the microorganisms in the reactor. Additionally, denaturing gradient gel electrophoresis (DGGE) profiles showed that there was an intensified bacterial diversity in the vermifilter due to the presence of earthworms, especially in response to the nutrients in their casts.
传统生物滤池（BF）和含有蚯蚓（赤子爱胜蚓）的蚯蚓滤池（VF）处理生活污水污泥的性能进行了比较，探讨了蚯蚓-微生物相互作用在污泥稳定化中的机制。结果表明，VF 中蚯蚓的存在通过提高挥发性悬浮固体（VSS）的减少量（25.1%），从而显著稳定了污泥。蚯蚓消化和蚯蚓-微生物相互作用分别对这一增加量的 54%和 46%负责。具体来说，VF 中的蚯蚓能够将不溶性有机物质转化为可溶形式，然后选择性地消化 10-200 微米的污泥颗粒到 0-2 微米的更细颗粒，从而导致反应器中的微生物进一步降解有机物质。此外，变性梯度凝胶电泳（DGGE）图谱显示，由于蚯蚓的存在，VF 中的细菌多样性得到了增强，特别是对其粪便中的养分的响应。
