Patent ID: 7094350

Claim:
A method of sludge recycling, comprising the steps of: bringing sludge into contact with a sludge degrading agent containing, as an active ingredient, microorganisms containing an actinomyces belonging to Streptomyces by passing the sludge through a sludge degradation promoting layer; degrading the sludge; separating the degraded sludge into a solid content and a liquid content; and producing recycled water from the liquid content, wherein said sludge degradation promoting layer comprises a multilayer structure formed by piling a layer of brick, a layer of natural stone, a layer of charcoal, and a layer made of zeolite on an upper part of a base; wherein said sludge degrading agent is adhered to the surface of the layers; and wherein said degrading step is carried out in an atmosphere alternating between anaerobic and aerobic.