Journal article
Integrating composting and vermicomposting in the treatment and bioconversion of biosolids
Bioresource technology, Vol.76(2), pp.107-112
2001
Handle:
https://hdl.handle.net/2376/111556
PMID: 11131792
Abstract
Traditional thermophillic composting is commonly adopted for treatment of organic wastes or for production of organic/natural fertilizers. A related technique, called vermicomposting (using earthworms to breakdown the organic wastes) is also becoming popular. These two techniques have their inherent advantages and disadvantages. The integrated approach suggested in this study borrows pertinent attributes from each of these two processes and combines them to enhance the overall process and improve the products qualities. Two approaches investigated in this study are: (1) pre-composting followed by vermicomposting, and (2) pre-vermicomposting followed by composting. The substrate was biosolids (activated sewage sludge) with mixed paper-mulch as the carbon base.
Eisenia fetida (red wigglers) was the species of earthworms used in the vermicomposting processes. The results indicate that, a system that combines the two processes not only shortens stabilization time, but also improves the products quality. Combining the two systems resulted in a product that was more stable and consistent (homogenous), had less potential impact on the environment and for compost–vermicomposting (CV) system, the product met the pathogen reduction requirements.
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Details
- Title
- Integrating composting and vermicomposting in the treatment and bioconversion of biosolids
- Creators
- P.M Ndegwa - Department of Biosystems and Agricultural Engineering, Southern Research and Outreach Center, University of Minnesota, Waseca, MN 56093, USAS.A Thompson - Department of Biological and Agricultural Engineering, Driftmier Engineering Center, University of Georgia, Athens, GA 30602, USA
- Publication Details
- Bioresource technology, Vol.76(2), pp.107-112
- Academic Unit
- Biological Systems Engineering, Department of
- Publisher
- Elsevier Ltd
- Identifiers
- 99900547632201842
- Language
- English
- Resource Type
- Journal article