Testing the impact of vermicomposting

Article Abstract:

Vermicomposting has distinct advantages over conventional composting. Research indicates that vermicomposting results in 50% to 65% increase in nitrification rates compared to conventional composting. Vermicomposting lowers the level of bioavailable heavy metals in compost by 35% to 55%. Humification levels increased particularly when earthworm population and activity were high. Human pathogens such as fecal coliform bacteria and salmonella are also killed in the vermicomposting process.

Nitrification

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Vermicomposting for the paper pulp industry

Article Abstract:

Mixing rabbit manure, pig or hen slurries and sewage sludge with paper sludge increases the potential of earthworms to transform the substrate into valuable compost. This mesophilic and aerobic hydrolysis process is an alternative treatment for waste produced by paper/pulp industry. Biotransformation is performed in two stages: destabilization and stabilization. Goals of the research program are discussed.

Wood pulp industry, Spain, Pulp industry

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Historical overview of vermicomposting

Article Abstract:

Research programs in England have shown that earthworms can be successfully used to convert organic material into valuable vermicomposts and it requires $25,000-$40,000 to built an automated reactor that will process 2500 tons of organic material per year. Earthworms are sensitive to temperature and chemicals including ammonia and salts so vermicomposting should be done at temperatures below 35 degrees.

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