METHOD AND APPARATUS FOR RECYCLING SOLID HOUSEHOLD WASTES AT LANDFILLS Russian patent published in 2016 - IPC B09B3/00 

FIELD: processing and recycling of wastes.

SUBSTANCE: method of recycling of solid household wastes at landfills involves loading wastes into plant, biodecomposition with formation of gaseous and solid products, neutralisation, cooling and accumulation of processing products, prior to loading method comprises radiation control of weight of solid domestic wastes, recycling solid domestic wastes, which is carried out in two steps, at first step solid domestic wastes are subjected to aerobic and anaerobic treatment to produce biogas, that is supplied for thermal and electric power generation. Second step involves thermal decomposition, wherein untreated part of wastes undergoes intense drying, and then pyrolysis, result of which is pyrolysis gas, which after cooling and cleaning is fed for thermal and electric power generation. Obtained as a result of pyrolysis pyrocarbonate is used in treatment of filtrate, which is released during biodecomposition. Other neutralised in installation solid fractions of wastes after cooling are delivered for burial. Apparatus for recycling solid domestic wastes at landfills comprises an elongated chamber for processing solid domestic wastes, which is inclined at slope of natural elevation of a specific area, in upper part of which there is an access path for filling solid domestic wastes into chamber via a hatch. In lower part of chamber there is a gate for dumping processed and neutralised mass of solid domestic wastes. Chamber consists of serially arranged zones of biodecomposition, thermal decomposition, which includes a pyrolysis section, zones for cooling and accumulation of processing products. Biodecomposition zone comprises two sections - section for aerobic and anaerobic treatment, in which there is a multifunctional structure, which is a blade for mixing moving mass of solid domestic wastes, collection and discharge of biogas, introduction of water and correcting solutions and device for collection and discharge of filtrate. On side wall of chamber there are hatches for sampling, zone of thermal decomposition additionally includes a section of drying and heating processed mass of solid domestic wastes and gas-stop chamber to prevent ingress of air from below into pyrolysis section. Outside on side surface there are stairs/elevator for servicing apparatus.

EFFECT: use of present group of inventions provides comprehensive continuous and accelerated processing of solid domestic wastes.

20 cl, 6 dwg