Anaerobic digestion device for kitchen waste

Abstract

The invention relates to an anaerobic digestion device for kitchen waste, which relates to the technical field of solid waste disposal. The anaerobic digestion device includes a reactor, an upper portion of the side wall of the reactor is connected to a feed tube for communicating the bottom of the reactor. The upper part of the reactor is provided with a tapered gas collecting hood and a three-phase separator, and the three-phase separator transports the separated wastewater and biogas to the upper water outlet and a biogas pipe to discharge out of the reactor. The anaerobic digestion deviceincludes a stirrer temperature controller, a slaked lime addition funnel and a pH detector. A stirrer is vertically fixed in the center of the reactor, and an agitating blade is disposed at the lowerportion of the stirrer. The temperature controller is placed on the bottom plate of the reactor, and the slaked lime addition funnel and pH detector are connected to the outer wall of the reactor. Theanaerobic digestion device can monitor the pH value in the reactor in real time and regulate the pH value, and controls the temperature in the reactor in real time, at the same time, the reactants and the sludge can be thoroughly mixed, so that the optimal conditions for anaerobic digestion are always maintained in the reactor.

Description

technical field [0001] The invention relates to the field of solid waste disposal, in particular to an anaerobic digestion of solid waste that cooperates with kitchen waste receiving and conveying, crushing, sorting and pulping, sand removal, anaerobic fermentation, oil separation, biogas slurry and biogas residue treatment and biogas treatment and utilization device. Background technique [0002] Food waste is the most important type of food waste, including food processing leftovers (kitchen waste) and food residues (swill) produced by families, schools, canteens, and catering industries. Its composition is complex, mainly a mixture of oil, water, fruit peels, vegetables, rice noodles, fish, meat, bones, waste tableware, plastics, paper towels and other substances. The amount of food waste in my country is very large, and it is showing a rapid upward trend. [0003] There are three mainstream treatment methods for food waste, 1) direct use as feed; 2) biogas production t...

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Problems solved by technology

[0004] Among the above methods, the anaerobic digestion technology of kitchen waste still has the following deficiencies: the temperature, pH value, nutrients and substrate toxicity in the anaerobic process have a greater impact on the fermentation process, and operators must constantly monitor the fermentation process, Judging and adjusting various parameters, it is difficult to realize real-time monitoring

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