TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The biogas major pipeline is provided with a valve, which is connected with a biogas storing soft airbag and a biogas storing tank. The first decomposition zone is provided with a temperature sensor and a pH probe, which sends out signals, are connected with corresponding display or a control meter. A polyurethane foamed insulating impermeable and airproof coating is arranged at the top of the pond, bottom of the pond or four sidewalls of the decomposition zone and the decompressing zone. A feeding nozzle comprising a reverse triangular funnel is arranged at the outer side of the material inlet, and a passage port is arranged at the bottom of the feeding nozzle, which is connected with the decomposition zone. The passage port is provided with a safety barrier. An artificial escape stair is arranged in the funnel-shaped body of the feeding nozzle, and provided with a metal top cover at the top. The last connected decompressing zone is provided with a biogas liquid outlet on the upper side. The connected biogas liquid outlet is provided with a leakage pond and the upper cover of the leakage pond is provided with a well port and a well cover on it. The inner side of the decomposition zone of the pond body is provided with stirring equipment. The stirring equipment is installed with a window arranged on the upper cover of the pond body, where a transmission shaft of the stirring equipment stretches out of the pond body from the top of the pond window and connected with the driving device. A stirring rod of the transmission shaft is connected on the lower side of the stirring equipment provided with a stirring blade on it. The stirring rod stretches to the depth of the middle lower side of the pond. An inspection well is arranged at the outer side of the biogas residue outlet. A passage is arranged at the bottom of the inspection well and connected with the decompressing pond. The inner side of the inspection well is provided with an artificial stair. A well port at the top end of the inspection well is provided with a well cover. A slurry pump is arranged at the outer side of the pond body at the top of the inspection well, where a suction pipe of the slurry pump stretches to the lower side of the inspection well. The dining kitchen waste material inlet is provided with a pipeline which is directly connected with the dining kitchen waste material discharging pipe, or the dining kitchen waste material discharging pipe is connected with the slurry pump. The suction pipe of the slurry pump is connected to the bottom part of a sedimentation tank. The dining kitchen waste material is delivered into the first decomposition zone from the sedimentation zone.