Organic waste anaerobic digestion-microbial electrolysis coupling reaction system and method thereof

Abstract

The invention discloses an organic waste anaerobic digestion-microbial electrolysis coupling reaction system. The system comprises an anaerobic digestion reactor, an extracting device, a dehydrating device and a water electrolysis device, wherein a feeding opening, a discharging opening and a gas outlet are formed in the anaerobic digestion reactor; the extracting device communicates with the anaerobic digestion reactor through the discharging opening; the dehydrating device communicates with the extracting device; a microbial electrolysis device is arranged in the anaerobic digestion reactor; and gas generated by the water electrolysis device enters the anaerobic digestion reactor through a gas inlet. The microbial electrolysis device comprises an anode, a cathode and a power supply. The invention further discloses a method for generating methane by using the system. The method comprises the following steps: water electrolysis, microbial electrolysis of organic waste, anaerobic digestion and the like. The organic waste anaerobic digestion-microbial electrolysis coupling reaction system is wide in treatment range, hydrolysis rate of organic substances is increased effectively, concentration of hydrogen sulfide is reduced, and the yield of methane is improved.

Description

technical field [0001] The invention belongs to the technical field of garbage treatment, and in particular relates to an anaerobic digestion-microbial electrolysis coupling reaction system and method of organic waste. Background technique [0002] Anaerobic digestion is a microbial conversion technology, especially suitable for the treatment and energy conversion of easily degradable organic waste. Therefore, it is especially suitable for the treatment of organic waste such as food processing, kitchen waste and kitchen waste, and livestock and poultry manure. It can not only efficiently convert this kind of organic waste into renewable energy—biogas, but also by-produce organic fertilizer, so as to realize the complete recycling and high-value utilization of organic waste. Organic waste has a high content of easily degradable components, which can be converted into bioenergy more easily, opening up new ways to alleviate the energy shortage and realizing the high-value conv...

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Problems solved by technology

[0004] At the same time, the existing anaerobic digestion methane production system has problems such as long start-up period, poor system stability, low organic matter degradation rate, and poor methane production effect.

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