Anaerobic fermentation equipment and method

Abstract

The invention discloses anaerobic fermentation equipment and a method. The anaerobic fermentation equipment comprises an outer anaerobic tank and an inner anaerobic tank, the inner anaerobic tank is arranged in the outer anaerobic tank, and the diameter of the inner anaerobic tank is smaller than that of the outer anaerobic tank and higher than that of the outer anaerobic tank; a circulating waterinlet is formed in the lower part of the inner anaerobic tank, a circulating water outlet pipe is arranged at the upper part of the inner anaerobic tank, and a water outlet of the circulating water outlet pipe is formed in the outer anaerobic tank; the top of the inner anaerobic tank is connected with a vacuum suction fan to adjust the pressure of the inner anaerobic tank; materials in the outeranaerobic tank enter the inner anaerobic tank through the circulating water inlet hole, then flow out of the circulating water outlet pipe and flow into the outer anaerobic tank to form circulation. By arranging the inner anaerobic tank and the outer anaerobic tank which are different, the pressure and liquid level difference of low relative pressure, high liquid level, high external relative pressure and low liquid level of the inner tank is formed, so that the natural hydraulic circulating stirring effect in the anaerobic tanks is realized, the anaerobic energy consumption is better reduced,the anaerobic fermentation efficiency is improved, and the operation cost and the installed power are reduced.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, in particular to an anaerobic fermentation equipment and method. Background technique [0002] Biogas fermentation, also known as anaerobic digestion and anaerobic fermentation, refers to organic matter (such as human, livestock and poultry manure, straw, weeds, etc.) under certain moisture, temperature and anaerobic conditions, through the catabolism of various microorganisms, and finally The process of forming a flammable mixture of gases such as methane and carbon dioxide. [0003] In the treatment of high-concentration organic wastewater, the anaerobic fermentation process can effectively reduce the concentration of organic pollutants in wastewater and generate biogas to realize the recycling of wastewater. In order to better improve the efficiency and capacity of anaerobic fermentation of organic pollutants, it is necessary to achieve continuous agitation in the anaerobic tank....

AI Technical Summary

Problems solved by technology

In order to better improve the efficiency and capacity of anaerobic fermentation of organic pollutants, it is necessary to achieve continuous agitation in the anaerobic tank. Traditionally, it is divided into three types: agitator agitation, hydraulic agitation and biogas agitation. Among them, the most used one is The agitator stirring method with low installation power is installed in the anaerobic tank and rotates continuously for 24 hours. With the passage of time and the wear of the agitator, it is difficult to replace the agitator, while the installed power of hydraulic agitation and biogas agitation Higher, resulting in relatively high operating costs

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