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Method and device for producing carbon source by using kitchen garbage

A kitchen waste and carbon source technology, applied in microorganism-based methods, biochemical cleaning devices, biochemical equipment and methods, etc., can solve the problems of difficult to control fermentation conditions, and achieve easy control of the fermentation process, low volatility, Ingredient stabilization effect

Pending Publication Date: 2021-04-09
深圳市利赛环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiment of the present invention is to provide a method and device for producing carbon source by using kitchen waste to solve the technical problem in the prior art that the fermentation conditions are difficult to control when kitchen waste is used to produce carbon source

Method used

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  • Method and device for producing carbon source by using kitchen garbage
  • Method and device for producing carbon source by using kitchen garbage
  • Method and device for producing carbon source by using kitchen garbage

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Experimental program
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Embodiment 1

[0050] Municipal food waste is collected and transported, sorted to remove non-fermentable metals, plastics and other sundries, water is added to adjust the solid-liquid ratio to 1:3, crushing and refining and three-stage extrusion dehydration are carried out to make kitchen waste slurry. The slurry is pumped into the water heating tank 3, heated to 100° C. by steam, heated in water for 45 minutes, and the crude oil is extracted through the three-phase centrifuge 4. The slurry after the oil extraction is pumped into the fermenter 5, and 5% of the seed liquid is inserted to adjust the pH value to 6.0, and the organic load is 150kgVSm -3 d -1 , fermentation temperature 40 ℃, fermentation 72h. After fermentation, the liquid is separated from solid and liquid using a centrifugal dehydrator 6, and the separated liquid phase is compounded with 25% sodium acetate at a mass ratio of 3:1, which is a composite carbon source.

Embodiment 2

[0052] Municipal food waste is collected and transported, sorted to remove non-fermentable metals, plastics and other sundries, water is added to adjust the solid-liquid ratio to 1:2, crushing and refining and three-stage extrusion dehydration are carried out to make kitchen waste slurry. The slurry is pumped into the water heat tank 3, heated to 90° C. by steam, heated in water for 30 minutes, and the crude oil is extracted through the three-phase centrifuge 4. The slurry after the oil extraction is pumped into the fermenter 5, and 5% of the seed solution is inserted to adjust the pH value to 7.0, and the organic load is 10kgVSm -3 d -1 , fermentation temperature 35°C, fermentation 48h. After fermentation, the liquid is separated from solid and liquid using centrifugal dehydrator 6, and the separated liquid phase is compounded with 25% sodium acetate at a ratio of 3:1, which is a composite carbon source.

Embodiment 3

[0054] Municipal food waste is collected and transported, sorted to remove non-fermentable metals, plastics and other sundries, water is added to adjust the solid-liquid ratio to 1:4, crushing and refining and three-stage extrusion dehydration are carried out to make kitchen waste slurry. The slurry is pumped into the water heat tank 3, heated to 100° C. by steam, heated in water for 60 minutes, and the crude oil is extracted through the three-phase centrifuge 4. The slurry after the oil extraction is pumped into the fermenter 5, inserts 5% seed liquid, adjusts the pH value to 5.0, and the organic load is 20kgVSm -3 d -1 , fermentation temperature 50 ℃, fermentation 96h. After fermentation, the liquid is separated from solid and liquid using centrifugal dehydrator 6, and the separated liquid phase is compounded with 25% sodium acetate at a ratio of 3:1, which is a composite carbon source.

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Abstract

The invention provides a method and a device for producing a carbon source by using kitchen garbage. The method comprises the following steps of: crushing the kitchen garbage, extruding and dehydrating to separate slurry; performing three-phase separation on the slurry to separate solid-phase solid residues, oil-phase grease and liquid-phase slurry; and mixing the slurry generated by the three-phase separation with a lactic acid bacteria seed solution, setting fermentation parameters and fermenting; performing solid-liquid separation on fermentation liquor, and compounding the generated liquid with organic matters to form the carbon source. According to the method and the device for producing the carbon source by using the kitchen garbage, the kitchen garbage is used as a raw material to produce the cheap and efficient composite carbon source, the fermentation conditions are controlled, efficient lactic acid bacteria are inoculated, directional lactic acid fermentation of the kitchen garbage is realized, and the volatility of lactic acid is low, so that the fermentation liquor taking the lactic acid as a main component is relatively stable in component, the fermentation process is easier to control, and the stability of a carbon source production process is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of garbage treatment, and more specifically relates to a method and a device for producing carbon sources from kitchen waste. Background technique [0002] With the improvement of discharge standards for sewage treatment plants in my country, the problem of total nitrogen exceeding the standard has been paid more and more attention. At present, most sewage plants adopt the biological denitrification process, and the denitrification process requires organic matter (carbon source) as an electron donor to proceed. However, limited by the biochemical treatment process, the denitrification stage of most sewage treatment plants has the problem of carbon-nitrogen ratio imbalance or insufficient biochemical properties, and organic matter needs to be added as a supplementary carbon source. At present, the most widely used ones are methanol, acetic acid, glucose and ethanol, etc., which have good denitrification effe...

Claims

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Application Information

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IPC IPC(8): C12P7/56C12M1/00C12M1/02C02F3/28C12R1/225
CPCC12P7/56C12M45/02C12M45/04C12M45/20C12M47/10C02F3/28C02F2305/06
Inventor 邓舟彭冲连红民毛智博刘锦伦肖建强唐成伟范永信麦若涵
Owner 深圳市利赛环保科技有限公司
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