Methane production and storage integrated anaerobic digestion device and anaerobic digestion method thereof

Abstract

The invention discloses a methane production and storage integrated anaerobic digestion device and an anaerobic digestion method thereof. The methane production and storage integrated anaerobic digestion device comprises a fermentation tank. A feed pipe, a discharge pipe and a methane pipe are arranged on the fermentation tank. A water seal tank is arranged on the upper portion of the fermentationtank. An overflow pipe for adjusting the water level of the water seal tank is arranged at the top of the water seal tank. A gasometer bell jar flowing up and down in the water seal tank according tothe methane storage volume is arranged at the top of the fermentation tank, and cooperates with the water seal tank to seal the fermentation tank. The methane inlet end of the methane pipe is locatedin the gasometer bell jar, and the methane outlet end is located outside the fermentation tank. The methane production and storage integrated anaerobic digestion device has a function of producing methane and storing the methane under constant pressure at the same time, and production cost is reduced.

Description

technical field [0001] The invention relates to an anaerobic digestion device integrated with gas production and storage and an anaerobic digestion method thereof, which belong to the field of waste water treatment of environmental engineering and are mainly used for waste water treatment. Background technique [0002] For high-concentration organic wastewater, such as breeding wastewater, alcohol wastewater, pharmaceutical wastewater, food processing wastewater, slaughter wastewater, beer wastewater, etc., through the establishment of large and medium-sized biogas projects, biogas fermentation technology is used for anaerobic digestion treatment to remove most of the organic pollution material while recovering energy—biogas. [0003] Biogas engineering is a systematic project involving multiple operating units. Its core devices are mainly anaerobic digestion tanks and gas storage tanks, of which gas storage tanks are divided into wet gas storage tanks and dry membrane gas s...

AI Technical Summary

Problems solved by technology

[0003] Biogas engineering is a systematic project involving multiple operating units. Its core devices are mainly anaerobic digestion tanks and gas storage tanks, of which gas storage tanks are divided into wet gas storage tanks and dry membrane gas storage tanks. In biogas engineering Some anaerobic digestion tanks and gas storage tanks are two independent devices. The advantage is that they are easy to overhaul and will not affect each other. The disadvantage is that two independent devices require two foundations and tank tops, and the construction cost is relatively high; some The anaerobic digestion tank and the gas storage tank are an integrated device. The gas storage tank adopts a dry membrane gas storage tank. The advantage is that only one foundation and membrane tank roof are required, and the construction cost is low. The disadvantage is that an additional explosion-proof fan is required to maintain a constant pressure. , Dry-type membrane gas cabinets are prone to aging and cracking due to the influence of ultraviolet rays, and are not easy to maintain, etc.

Through research and literature review, it was found that the membrane gas cabinets in the integrated anaerobic digestion unit cracked or even collapsed to varying degrees, posing a great safety hazard and causing the biogas project to fail to operate normally

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