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Innocent treatment method for kitchen waste

A technology for harmless treatment of kitchen waste, applied in chemical instruments and methods, sludge treatment, sedimentation treatment, etc. problems, to achieve the effect of improving improvement capacity, improving anaerobic digestion, and improving anaerobic digestibility

Active Publication Date: 2020-02-04
湖南三五二环保科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent 201811082592.0 discloses a method of hydrothermal carbonization coupled with Yanyang digestion and treatment of kitchen waste. The efficiency is low, and the carbonaceous substances in the kitchen waste cannot be effectively converted into hydrothermal charcoal at the maximum conversion rate, and when the obtained hydrothermal charcoal, hydrothermal liquid or a mixture of the two is subjected to anaerobic digestion , due to the high temperature treatment of hydrothermal charcoal and hydrothermal liquid, the microorganisms in the kitchen waste have been killed, and the digestion rate of hydrothermal charcoal, hydrothermal liquid or a mixture of the two is relatively slow. Food waste treatment takes too long

Method used

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  • Innocent treatment method for kitchen waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] see Figure 1-2 , is a kind of food waste harmless treatment method of the present invention, comprises the following steps:

[0037] 1) Use the sorting device 1 to sort the collected kitchen waste from the coarse solid waste, and use the screen 2 to screen out the sediment and gravel;

[0038] 2) Transfer the mixture obtained in step 1) to the first primary sedimentation tank 3 for sedimentation;

[0039]3) Transfer the first primary sedimentation supernatant obtained after the primary sedimentation in the first primary sedimentation tank 3 in step 2) to the aeration tank 4, and transfer the first primary sedimentation sludge obtained after the primary sedimentation to the second primary sedimentation tank 3 Settling in the primary sedimentation tank 5;

[0040] 4) The sludge obtained by mixing the aeration supernatant aerated in the aeration tank 4 in step 3 and the second primary sedimentation supernatant obtained after the second primary sedimentation tank 5 is se...

Embodiment 2

[0046] see figure 1 , image 3 , a method for harmless treatment of kitchen waste provided by the present invention, comprising the following steps:

[0047] 1) Use the sorting device 1 to sort the collected kitchen waste from the coarse solid waste, and use the screen 2 to screen out the sediment and gravel;

[0048] 2) Transfer the mixture obtained in step 1) to the first primary sedimentation tank 3 for sedimentation;

[0049] 3) Transfer the first primary sedimentation supernatant obtained after the primary sedimentation in the first primary sedimentation tank 3 in step 2) to the aeration tank 4, and transfer the first primary sedimentation sludge obtained after the primary sedimentation to the second primary sedimentation tank 3 Settling in the primary sedimentation tank 5;

[0050] 4) The sludge obtained by mixing the aeration supernatant aerated in the aeration tank 4 in step 3 and the second primary sedimentation supernatant obtained after the second primary sedimen...

Embodiment 3

[0056] see figure 1 , image 3 , a method for harmless treatment of kitchen waste provided by the present invention, comprising the following steps:

[0057] 1) Use the sorting device 1 to sort the collected kitchen waste from the coarse solid waste, and use the screen 2 to screen out the sediment and gravel;

[0058] 2) Transfer the mixture obtained in step 1) to the first primary sedimentation tank 3 for sedimentation;

[0059] 3) Transfer the first primary sedimentation supernatant obtained after the primary sedimentation in the first primary sedimentation tank 3 in step 2) to the aeration tank 4, and transfer the first primary sedimentation sludge obtained after the primary sedimentation to the second primary sedimentation tank 3 Settling in the primary sedimentation tank 5;

[0060] 4) The sludge obtained by mixing the aeration supernatant aerated in the aeration tank 4 in step 3 and the second primary sedimentation supernatant obtained after the second primary sedimen...

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Abstract

The invention discloses an innocent treatment method for kitchen waste. The method comprises the steps of sorting and screening coarse solids and gravels from collected kitchen waste, carrying out sedimentation by a first primary sedimentation tank, aeration by an aeration tank and sedimentation by a second primary sedimentation tank so as to obtain waste activated sludge and primary sewage sludge, subjecting the waste activated sludge to centrifugation, then, carrying out hydrothermal carbonization, carrying out centrifugation so as to obtain wet state hydrothermal charcoal and hydrothermal carbonized liquid, transferring the hydrothermal carbonized liquid and the primary sewage sludge into a leachate bed reactor for an anaerobic digestion reaction so as to obtain biogas capable of serving as new energy, and drying the wet state hydrothermal charcoal by a solar dryer, so as to obtain a high-energy environment-friendly biofuel energy. According to the method provided by the invention,the hydrothermal charcoal with higher phosphorus content and yield is obtained, the digestibility of an anaerobic digestion process is improved, and thus, the residual amount of digested sediment is reduced; and after innocent treatment, the hydrothermal charcoal and the biogas as biofuel energy sources can be obtained, and thus, the recycling of energy is achieved.

Description

technical field [0001] The invention relates to the technical field of sewage sludge treatment, in particular to a harmless treatment method for kitchen waste. Background technique [0002] Kitchen waste, commonly known as swill, also known as swill, swill, etc., is mainly produced in the catering industry, canteens and households. It mainly refers to the highly perishable domestic waste generated by people's eating behavior. Compared with other garbage, it has the characteristics of high content of water, oil and inorganic salt. Food waste accounts for a relatively large proportion of urban domestic waste. Because food waste is a "high-quality culture medium for harmful organisms produced by human beings", it is very easy to spontaneously breed mosquitoes, flies, and bacteria, producing toxic, odorous, and flammable gases, which brings fire hazards and environmental and public health issues. Improper use of waste oil and swill from food waste is extremely harmful. Food wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02C02F11/10C02F11/04C02F11/127C10L5/46C10B53/00
CPCC02F9/00C02F11/10C02F11/04C02F11/127C10L5/46C10B53/00C02F1/00C02F2001/007C02F7/00C02F2301/08Y02E50/10Y02E50/30
Inventor 谢耀明
Owner 湖南三五二环保科技有限公司
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