Patent ID: 8492134

Claim:
A method for decomposition of organic matter into biogas and compost, the method comprising: (a) loading solid organic waste into a waste processing tank; (b) during one or more series of anaerobic hydrolysis and gasification stages: (i) spraying percolation liquid over the solid organic waste in the waste processing tank during a first anaerobic hydrolysis stage in which anaerobic bacterial hydrolysis takes place; (ii) recirculating a first portion of the percolation liquid after it passes through the solid organic waste in the waste processing tank and, without first passing the first portion of the percolation liquid through a biogas reactor, spraying the first portion of the percolation liquid over the solid waste during the first anaerobic hydrolysis stage; (iii) pumping a second portion of the percolation liquid into the biogas reactor tank for generation of biogas during a first gasification stage; (iv) pumping percolate liquid out of the biogas reactor tank following the first gasification stage, for spraying over the solid organic waste in the waste processing tank during a second and/or subsequent hydrolysis stage; and (c) following all anaerobic hydrolysis and gasification stages, ventilating the waste processing tank for composting of the solid organic waste under aerobic conditions.