TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The anaerobic tank is sealed. The anaerobic tank is divided into a main anaerobic tank, a secondary anaerobic tank and a drain anaerobic tank. Each anaerobic tank is cylindrical in shape and the top is designed with a gas storage cabinet. The cabinet is designed in the form of ladder and can be consistently moved up and down, and contacted with the ground at the base. The ascending order is designed to a concrete pad or brick-concrete pad, timber cushion, and concrete layer. The tank is reinforced concrete structure double tank provided with outer layer, and provided with vertical and horizontal load-bearing steel structure, and can be designed into large for large station. The anaerobic tank is designed into geometry of column body, table body, vertebral body, sphere body, and ellipsoidal body. The main anaerobic tank is provided with feeding anaerobic tank, bottom designed structure, a material pipe, a distributor, and a sealing door. The upper side of overflow pipe is extended into the secondary anaerobic tank. The side of the secondary anaerobic tank is designed with the drain anaerobic tank. The bottom designed structure and the feedstock pipe are connected with the overflow pipe of the main anaerobic tank. The bottom discharging port is protected with a reflux cover. The anaerobic tank bottom discharge pipeline is designed with sealing door. The upper side of the overflow pipe is connected with the lower pair of anaerobic tank feeding pipe. The drain anaerobic tank is designed with the overflow pipe and upper part is designed with the feedstock pipe. The overflow pipe and the tank wall from a certain angle in at the anaerobic tank along vertical to bottom. The anaerobic tank and overflow pipe form certain angle with anaerobic tank wall. The pipe valve is connected with the drainage pipe. The bottom of each anaerobic tank is designed with a condensed water drain pipe, a switch valve, and a condensed water drain pipe system. The drain pipe system is designed with the secondary anaerobic tank and the drain anaerobic tank. Each tank from the drain pipe system is set with at last waste and marsh liquid pool. The top of the middle of the anaerobic tank is designed with a sealed chamber. The indoor sealing is designed with a power device. The bottom of the power device is connected with a stirrer. The anaerobic tank is designed with the overflow pipe. The anaerobic tank internal overflow pipe form certain included angle and is designed with a double layer wall. The double layer wall is heating layer, and the outermost layer is insulating layer. The gas storage tank is designed with a circular pavement. The upper part of the gas storage tank is designed with an observation hole and a biogas outlet. The top of the storage tank is intersected between the anaerobic tanks. The loading beam is designed with a backwater cover. The cover is designed with holes for leading passage into biogas storage tank. The bottom of the cover is suspended with load-bearing beam and designed with a sealed chamber. The sealed chamber outside space is communicated with walkways. The walkways and chamber are communicated with external space. The walkways and sealed chamber walls are designed with a transparent glass observation hole, which can be openable and closable. The outer wall is sealed and designed automatic alarm open door. The anaerobic tank is designed with a purification tower for purification of produced biogas and removing water, sulfur dioxide and carbon dioxide. The purification tower consists of the agitator, the reaction column, separation column, sedimentation tanks and other components. The biogas and lime solution from bottom side of the stirring tube is introduced into the mixing tower via high pressure column, then introduced from top of the stirring tower into the reaction tower through catheter, introduced into the next cycle from the top of the reaction column and finally conveyed into the separation column. The separated gas is discharged from the top of the separation column, and reaction solution separated from the bottom of the column is introduced into the sedimentation tank through draft tube. The power generation unit comprises a water tank, an electric generator and an engine. The biogas is used as power fuel for generating electric power. The hot water is circulated in hot water tank and is designed with the fuel gas boiler and pressure pump. The water in power generation unit is vaporized using fuel gas boiler and conveyed into the anaerobic tank heating interlayer for providing heat source. The station utilizes town, farm and sewage, straw as raw material for multistage anaerobic fermentation, and involves stirring, heat preserving, warming and automatic alarming in alarm device for producing biogas.