Device for improving yield of methane produced from kitchen waste through anaerobic digestion and method for producing methane

Abstract

The invention discloses a device for improving the yield of methane produced from kitchen waste through anaerobic digestion and a method for producing the methane, relates to the technical field of treatment on kitchen waste, and belongs to the technical field of solid waste recycling. A stirring paddle connected with a transmission shaft of an engine is arranged inside a fully-mixing reaction chamber, the outlet end of an alkaline liquor box is connected with one end of an alkaline liquor pipe, the other end of the alkaline liquor pipe is positioned at the upper end face of the fully-mixing chamber, a U-shaped pipe is serially connected onto the alkaline liquor pipe, an electromagnetic valve is arranged on the alkaline liquor pipe between the U-shaped pipe and the alkaline liquor box, a pH electrode probe and the electromagnetic valve are respectively connected with a signal processing and controlling device through a wire, a first sampling pipe, a second sampling pipe and an alkaline liquor discharging pipe are respectively arranged on the side wall of the fully-mixing reaction chamber, a water bath chamber is arranged at the periphery of the fully-mixing reaction chamber, and a recirculated water inlet pipe and a recirculated water outlet pipe are respectively arranged on the side wall of the water bath chamber. Through the device, the purposes of being simple in process and structure, high in automation degree and easy to operate, and capable of increasing the yield of the methane are achieved.

Description

technical field [0001] The invention relates to the technical field of processing kitchen waste, and belongs to the technical field of solid waste recycling. [0002] Background technique [0003] With the development of the economy and the improvement of people's living standards, kitchen waste, as an important part of urban waste, is increasing year by year, and its proportion in urban waste is also increasing. According to the survey, the amount of food waste produced in cities with a population of tens of millions, such as Beijing, Shanghai, Shenzhen, and Guangzhou, exceeds 1,000 t / d. [0004] Food waste mainly comes from people's daily consumption. Generally speaking, it has less toxic and harmful substances and is rich in protein, oil, starch and other organic matter, which is easy to breed microorganisms and pollute the environment. [0005] At present, common food waste treatment methods include composting, landfill and anaerobic digestion, etc., but these methods ...

AI Technical Summary

Problems solved by technology

Composting treatment has high energy consumption, is prone to corruption and odor, and the energy contained in organic matter cannot be fully utilized; landfill treatment is easy to cause waste of organic matter; anaerobic digestion has serious acidification and low biogas production.

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