| 摘要 |
A chemical additive is taught for the improvement of anaerobic digestion treatment of water-borne organic biomass by the addition of at least about 500 ppm or greater of a formate salt or mixtures of formate salts, the added presence being based on the total solids content of the organic based biomass in the wastewater stream, with the formate salts enhancing the anaerobic microbial activity in an anaerobic digestion zone and thereby promoting reduction of residual sludge of the biomass and reduction of chemical oxygen demand for the biomass digestion. The formate salts can be added by mixing the soluble salts with the water-borne organic biomass, or in the alternative by producing the formate salts insitu by adding formic acid to the biomass in the presence of at least about 100 mg/:based on the total biomass solids content followed by addition of appropriate amounts of base materials to complete the formation of the dissociated salts so as to maintain the wastewater in the appropriate pH range.
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