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Birgitte Ahring, Ph.D., with the biodigesters used in her pilot project for pretreating wastewater treatment solids with steam and pressure.
A pilot project significantly boosted biogas yield by pretreating biosolids with steam, pressure and oxygen before anaerobic digestion.
The process converted 80-85% of the organic material to biogas, versus the typical 50% without pretreatment, says Birgitte Ahring, Ph.D., a...
