According to the STRABAG manufacturer, under anaerobic conditions, the method of using natural microorganisms or inoculated microorganisms to convert organic matter into carbon dioxide and methane gas is called anaerobic digestion treatment. This method has the advantages of low energy consumption, less residual sludge and energy recovery. In recent years, dry anaerobic digestion technology has been actively developed and applied in developed countries, especially in Europe, and will become one of the directions of organic solid waste treatment in the future.

According to the STRABAG manufacturer, under anaerobic conditions, the method of using natural microorganisms or inoculated microorganisms to convert organic matter into carbon dioxide and methane gas is called anaerobic digestion treatment. This method has the advantages of low energy consumption, less residual sludge and energy recovery. In recent years, dry anaerobic digestion technology has been actively developed and applied in developed countries, especially in Europe, and will become one of the directions of organic solid waste treatment in the future.

According to the STRABAG manufacturer, the dry anaerobic fermentation process needs to solve the contradiction between high solid content and mass transfer, maintain the homogeneity of the materials in the tank, and avoid phase separation. Therefore, the requirements for the tank structure and stirring method are very high, which is also The technical difficulty of the dry anaerobic fermentation process.

According to the STRABAG manufacturer, in addition to the control of the biochemical system, another key issue is to ensure high efficiency mixing operation, which is also one of the important means to avoid phase separation of materials in the tank. Generally, the dry anaerobic fermentation process requires strict control of the solid content, viscosity, inert material ratio, etc. in the tank. For dry anaerobic fermentation system, no matter vertical or horizontal structure, once phase separation occurs, three-phase separation of heavy, water and light materials will occur in the tank, and heavy materials will be separated. After this happens, for the horizontal mechanical stirring mode, the deposits in the tank will cause the mechanical stirring to fail. It is almost impossible to restore the system to the operating state without the tank. In the vertical tank, if the bottom cone bottom discharge is used, once the phase separation occurs, the sediment will block the discharge port, and the tank needs to be cleaned and restarted. If the bottom high-pressure biogas is used for stirring, deposition will reduce the stirring efficiency, but will not affect the operation of high-pressure biogas stirring. At the same time, the vertical tank outlet is provided with low and high outlets. The high level outlet can be used for continuous draining and backflow when sediment blocks the low level outlet. In addition, the normal operation of high-pressure gas stirring can restore the operation of the tank body in the unclear tank state.

What are the advantages of dry anaerobic digestion technology? STRABAG manufacturers to introduce for you!

1. Dry anaerobic digestion technology not only has high waste treatment efficiency and obtains organic fertilizer products with higher fertilizer content, but also produces biogas as energy. This is very important in the era of energy shortage in the world. Anaerobic digestion technology is one of the important biomass utilization technologies. It converts solid organic matter into dissolved organic matter, and then transfers the energy contained in the waste into rich gas for combustion or power generation, realizing the recovery of resources and energy; after anaerobic digestion, there are fewer stars and the nature is stable; the reaction equipment is closed, The smell is controllable.

2. Aerobic digestion improves the energy balance of organic waste treatment and has great advantages in economic and environmental aspects. However, if wet anaerobic digestion of kitchen waste is used, the energy consumption of mixing equipment and dehydration equipment is very large. At the same time, because of the need to clean up, so will be removed in the middle of the residue caused by biogas interruption. In addition, the amount of water used for wet dilution (about 1 ton of water/1 ton of garbage), thereby increasing the amount of biogas treatment, is a substantial increase in process operating costs.

3. Anaerobic Digestion of Kitchen Waste The company understands that it is designed to keep solid waste in its original state for anaerobic digestion and only dilute with water at a high concentration (TS60%). Therefore, dry anaerobic digestion technology is directly used. It does not need to add water or dehydrate, simplifying the previous treatment and saving energy consumption. In addition, dry anaerobic technology meets the requirements of current municipal waste treatment because it can treat high solid rate waste.