An anaerobic digestion treatment device for food waste

Abstract

The invention discloses an anaerobic-digestion treatment device for food wastes. A first sediment discharging device and a first scum discharging device are arranged in a hydrolysis pot; the hydrolysis pot comprises a hydrolysis sediment outlet, a hydrolysis scum outlet, a hydrolysis methane outlet and a hydrolysis material outlet, wherein the hydrolysis material outlet is communicated with the inlet of a second delivery pump, and the outlet of the second delivery pump is communicated with the inlet of an anaerobic pot; a second scum discharging device is arranged in the anaerobic pot, the anaerobic pot comprises three outlets, namely an anaerobic outlet of biogas residues, an anaerobic scum outlet, and an anaerobic methane outlet, wherein the anaerobic methane outlet is communicated with the inlet of a methane storage cabinet. According to the anaerobic-digestion treatment device disclosed by the invention, a plurality of scum discharging measures and sediment discharging measures are utilized, so that light and heavy small impurities which still exist in the food wastes treated by pretreatment devices can be removed, the long-term stable methane production of anaerobic digestion gets the benefit, the whole anaerobic-digestion treatment device adopts a pumping mode to delivery materials, fully-closed pipeline delivery is adopted, and the whole anaerobic-digestion treatment device has no points leaking odor.

Description

technical field [0001] The invention belongs to the technical field of catering waste treatment, and in particular relates to an anaerobic digestion treatment device for catering waste. Background technique [0002] Catering waste has the dual attributes of being harmful and resourceful. Blind and improper treatment not only causes environmental pollution and endangers the health of residents, but also is a huge waste of resources. The main outlets for traditional catering waste are: first, they are directly fed to live pigs by pig farmers in the suburbs without any treatment, and thousands of "garbage pigs" are sold; [0003] At present, there are roughly three mainstream technologies for recycling food waste in China: aerobic composting, feed conversion, and anaerobic digestion to produce biogas. Aerobic composting has the advantages of simple process, high degree of resource utilization, and agricultural value of products, but it cannot solve the pollution of harmful org...

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Problems solved by technology

[0004] At present, domestic anaerobic digestion technology is mostly concentrated in the field of waste water and organic waste with low solid content. For the treatment of organic solid waste with high solid content such as catering waste, when anaerobic digestion technology is applied, there will be sediment and scum The amount is not easy to remove, resulting in the blockage of the conveying equipment, the continuous reduction of the effective volume of the anaerobic tank, and the continuous accumulation of scum affecting the output of biogas, etc., requiring regular tank cleaning, which affects the stable operation of the system. , anaerobic bacteria and food waste raw materials cannot be well mixed, and the temperature control method is relatively backward, resulting in low biogas yield

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