Kitchen garbage pretreatment system and method

Abstract

The invention provides a kitchen garbage pretreatment system and method. The system comprises a pulpifying machine, a desanding system, a sterilization device and a two-phase centrifugal machine, wherein the pulpifying machine comprises a pulpifying cavity, a rotor arranged in the pulpifying cavity, a kitchen garbage inlet, a residue discharging opening and a sieve plate, the kitchen garbage inlet and the residue discharging opening are formed in the wall of the pulpifying cavity, the sieve plate is arranged at an opening in the bottom of the pulpifying cavity, and a liquid discharging opening is formed below the sieve plate; the desanding system communicates with the liquid discharging opening of the pulpifying machine; the sterilization device communicates with a liquid discharging opening of the desanding system; and the two-phase centrifugal machine communicates with a discharging opening of the sterilization device and is used for separating materials from the sterilization device into a liquid phase and a solid phase. The kitchen garbage pretreatment system can realize high-precision separation of organic matters and impurities; the yield of biological anaerobic degradation products is high, and the recycling rate of kitchen garbage is high; the liquid phase purity is high, and the stability of a subsequent anaerobic system is facilitated; and the operation cost is low, and a key technical support is provided for full-resource utilization of the kitchen garbage.

Description

technical field [0001] The invention relates to the technical field of garbage treatment, in particular to a kitchen waste pretreatment system and method. Background technique [0002] At present, in addition to the two major harmless treatment processes of landfill and incineration, the separate treatment of kitchen waste is mostly based on biochemical treatment and resource utilization, and biochemical treatment is mainly based on two major treatment processes: anaerobic digestion and aerobic composting. . Compared with the traditional aerobic composting process, anaerobic digestion is carried out in a closed environment, the environmental impact is relatively small, and it has great advantages in the impact on the surrounding environment and the utilization of the final product, representing the current mainstream development direction. [0003] Because anaerobic digestion technology only works on organic matter, and kitchen waste is a mixture of organic matter and non-...

AI Technical Summary

Problems solved by technology

But there are the following defects: (1) In principle, the organic matter in the garbage does not conform to the size rule, and only has the significance of sorting in probability, and particle size sorting will inevitably cause a large loss of organic matter; (2) The bagged garbage must be broken. ; (3) Sorting rejects are still garbage, and garbage treatment is still needed, and the reduction rate is low

However, there are the following defects: (1) crushing and pulping will cause a large amount of impurities to be broken into the slurry together, which will bring difficulties to the subsequent removal of impurities; (2) the organic matter in the pressing pulping will be carried away by the impurities, and the recovery rate of organic matter is extremely low

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