中国水产科学研究院机构知识库

Performance and mechanism of vermifiltration system for liquid-state sewage sludge treatment using molecular and stable isotopic techniques

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文献类型：外文期刊

作者： Xing, Meiyan ¹ ; Li, Xiaowei ¹ ; Yang, Jian ¹ ; Lv, Baoyi ¹ ; Lu, Yongsen ¹ ;

作者机构： 1.Tongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resources Reuse, Shanghai 200092, Peoples R China

2.Chinese Acad Fishery Sci, Engn Res Ctr Saline Alkali Water Fisheries, E China Sea Fisheries Res Inst, Shanghai 200090, Peoples R China

关键词： Vermifilter;Sewage sludge;Stable isotopic analyses;Polymerase chain reaction-denaturing;gradient gel electrophoresis (PCR-DGGE);Real-time PCR

期刊名称：CHEMICAL ENGINEERING JOURNAL （影响因子：13.273；五年影响因子：11.529 ）

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收录情况： SCI

摘要： Performance and mechanism of a conventional biofilter (BF) and a vermifilter (VF) containing earthworms were studied for liquid-state sewage sludge treatment. Results showed that removal rates of the VF for suspended solid (SS), volatile SS, total chemical oxygen demand (TCOD) and 5-day biological oxygen demand (BOD_5) were higher than that of the BF. The effluent sludge of VF (ESVF) had lower N, C and H contents, with higher quantities of δ~(15)N, δ~(13)C and aromatic groups than that of BF (ESBF). Compared to ESBF, ESVF had higher activities of protease, glucosidase, lipase and amylase, and less densities of total bacteria, a-, p- and y-proteobacteria. These indicated the presence of earthworm improved the treatment performance of the VF and promoted the stabilization of ESVF. Additionally, passage through the intestinal tract of earthworms caused a decrease in the densities of a- and p-proteobacteria, and an increase in the density of Nitrospira of the VF biofilms. Stable isotopic analyses implied that earthworm adults, hatchlings and cocoons appeared to be found in the highest position; hirudinea in the second highest position; gastropoda adults and larvae, diptera adults at intermediate level; diptera larvae in the lower position of food web in VF system.

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