Process of and digester for anaerobic digestion of sludge

摘要

Anaerobic digestion of sewage sludge, a flow of fresh sludge with a dry content = 40 g/liter is fed into the upstream end of a digester (200) to maintain a thin sludge layer within it with a thickness of =0.5 m. The sewage is circulated horizontally over and across the sludge layer. The sewage is extracted outside the digester, together with any soluble by-products of the sludge digestion. Anaerobic digestion of sewage sludge, a flow of fresh sludge with a dry content =40 g/liter is fed into the upstream end of a digester (200) to maintain a thin sludge layer within it with a thickness of =0.5 m. The sewage is circulated horizontally over and across the sludge layer. The sewage is extracted outside the digester, together with any soluble by-products of the sludge digestion. The body (201) of the digester is dived by lateral walls (213a-213c) into compartments with lower passage openings (216) with an upper ring edge (217) over the base (203) for the sewage flow.