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Kitchen waste treatment system and method

A kitchen waste and treatment system technology, applied in waste treatment, biomass post-processing, biomass pretreatment, etc., can solve problems such as human health hazards, increase antibiotic drug residues, homologous pollution, etc., to prevent The effect of secondary pollution of the environment, realization of resource utilization, and improvement of operational stability

Inactive Publication Date: 2019-03-26
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The use of food waste in my country has a long history, and its main purpose is to be collected by farmers around the city for direct use as animal feed or as plant fertilizer. However, the problem with this method of utilization is that food waste contains a large number of pathogenic microorganisms On the one hand, it is easy to cause animal infection, and on the other hand, it can cause human infection and form cross-infection; pigs are prone to infection and induce various diseases after eating, and then increase the dosage of dru

Method used

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  • Kitchen waste treatment system and method

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Effect test

Embodiment 1

[0040] see figure 1 , a food waste treatment system, the food waste treatment system includes a food waste digestion system and a biogas slurry treatment system, the food waste digestion system includes a garbage receiving hopper, a bag breaking machine, a manual sorting platform, a spiral lifting Conveyor, crushing and pulping machine, solid-liquid separator, cyclone desander, wet thermal hydrolysis tank, three-phase decanter centrifuge, homogenizing tank, anaerobic digestion tank, screw dehydrator, biogas slurry transfer station, solid waste Collection devices, biogas purifiers, refining and purification devices, CNG tanks and biogas boilers;

[0041] The garbage receiving hopper receives the food waste carried by the food waste transport vehicle and transports it to the bag breaker through the screw conveyor;

[0042] The bag breaking machine breaks the garbage and sends it to the manual sorting platform;

[0043] The manual sorting platform manually sorts the food waste,...

Embodiment 2

[0063] Another embodiment 2 of the present invention can be used as a further improvement of embodiment 1. In the homogeneous tank, the solid content of the mixed slurry is adjusted to 8%, and the supernatant after biogas slurry treatment is used for the adjustment liquid. There is a conical bottom to settle the sediment, and the sand is regularly discharged through the sand discharge port. The slurry storage device is equipped with a warming and heat preservation device. The internal temperature of the slurry storage device is 35-38°C, and the pH value of the liquid is controlled at 6.5-8.5. Controlled by the online monitoring device, the slurry stays in the slurry storage device for 1 day.

Embodiment 3

[0065] Another third embodiment of the present invention can be used as a further improvement of the first and second embodiments. The anaerobic digestion tank is set to adopt warm anaerobic fermentation, the heating temperature is 35°C, and the carbon-to-nitrogen ratio of the material (C:N) Control within the range of 20:1-25:1; the anaerobic digestion tank is a cylindrical fermenter with a flat bottom and a concrete sealed structure. The upper part of the fermenter is equipped with a scum removal device, and the top of the fermenter is equipped with a biogas hood , collect biogas and transport it to the biogas treatment process. The slurry stays in the fermentation tank for 21 days. The outer surface of the anaerobic digestion tank is equipped with thermal insulation devices and temperature compensation devices. The heat required by the temperature compensation device is provided by the biogas boiler.

[0066] The invention also specifically discloses a method for disposing o...

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Abstract

The invention relates to a kitchen waste treatment system and method. The system comprises a kitchen waste digestive system and a biogas slurry treatment system; and the kitchen waste digestive systemcomprises a waste receiving hopper, a bag breaking machine, a manual sorting platform, a spiral lifting conveyor, a crushing pulping machine, a solid-liquid separator, a cyclone desander, a damp hothydrolyzing tank, a three-phase horizontal screw centrifugal machine, a homogeneous pool, a anaerobic digestion tank, a spiral dehydrator, a biogas slurry transfer station, a solid waste collecting device, a biogas purifier, a refining purifying device, a CNG tank and a biogas boiler. According to the kitchen waste treatment system and method, after kitchen waste is subjected to series of treatment, rough grease, biogas, biogas residues and biogas slurry are obtained, the biogas residues and the biogas slurry can be made into organic fertilizers, the rough grease can be made into biodiesel after being processed, the landfill occupied area in the original kitchen waste treatment process is greatly decreased, secondary pollution to the environment is effectively prevented, kitchen waste recycling is achieved, and the good application prospect is realized.

Description

technical field [0001] The invention belongs to the field of solid waste treatment, in particular to a kitchen waste treatment system and treatment method. Background technique [0002] Kitchen waste is the general term for catering and kitchen waste. Catering waste refers to food residues in restaurants, restaurants, unit canteens, etc., and waste from the processing process of back kitchens, such as vegetables, meat, grease, pasta, etc.; kitchen waste It is perishable organic waste discarded in the daily life of the family, such as fruits and vegetables, food scraps, leftovers, melon and fruit peels, etc. [0003] Food waste is characterized by high water content, with a water content of 80%-95%; high sugar content, mainly protein, starch and animal fat, and high salt content (some food waste has high chili and acetic acid content) ; High organic content (protein, cellulose, starch, oil, etc.), high impurity content, high viscosity. Perishable, easy to ferment, easy to s...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00C12M1/107C12P5/02
CPCC12M21/04C12M23/36C12M45/02C12M45/04C12M45/06C12M45/20C12M47/18C12P5/023B09B3/00B09B5/00Y02W30/20Y02E50/30
Inventor 林朝阳何楚亮
Owner DONGGUAN UNIV OF TECH
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