ANAEROBIC DIGESTION APPARATUS FOR ORGANIC WASTE LIQUID

摘要

An anaerobic digestion apparatus for an organic waste liquid, wherein a digested sludge from the organic liquid is concentrated and the concentrated sludge is returned to an anaerobic digestion tank and, at the same time, the digested sludge is solubilized and the solubilized sludge is returned to the anaerobic digestion tank, and wherein the concentrated sludge is mixed with the solubilized sludge at the suction side of a transfer pump (4) for transferring the concentrated sludge and is adjusted with respect to its concentration and then returned to the anaerobic digestion tank (1). The above apparatus allows the combination of the smooth return of the concentrated sludge and the enhancement of the concentration ratio for the digested sludge resulting in an efficient concentration of the sludge, and also allows satisfactory dispersion of the returned concentrated sludge in the anaerobic digestion tank resulting in efficient digestion and thus the enhancement of the reduction ratio of the amount of the sludge.