A method for producing clean energy by using food waste

A food waste and clean energy technology, applied in the direction of microorganism-based methods, biochemical equipment and methods, chemical instruments and methods, etc., can solve the problems of less biogas, inability to obtain hydrothermal charcoal, and low energy recovery rate

Active Publication Date: 2020-10-30
湖南三五二环保科技有限公司
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  • Claims
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Problems solved by technology

[0005] Chinese patent 201410031722.3 discloses a comprehensive domestic waste treatment method based on anaerobic digestion and hydrothermal carbonization. The technical solution is to carry out comprehensive treatment of domestic waste through the processes of slurry treatment, anaerobic digestion, hydrothermal carbonization and dehydration drying, and finally obtain Biogas and hydrothermal charcoal in the form of stable carbon elements. This technical solution performs anaerobic digestion before the hydrothermal carbonization step, resulting in less residual solids after anaerobic digestion, and cannot obtain a large amount of hydrothermal charcoal. Anaerobic digestion is carried out after slurry treatment, which cannot fully degrade domestic waste, and the amount of biogas obtained is small, and only biogas can be obtained as a clean energy source. Its calorific value is not as high as that of hydrogen, and the energy generated is less , low energy recovery

Method used

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  • A method for producing clean energy by using food waste
  • A method for producing clean energy by using food waste
  • A method for producing clean energy by using food waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] see Figure 1-2 , is a kind of method of utilizing food waste to produce clean energy of the present invention, comprises the following steps:

[0040] 1) Sorting the collected kitchen waste by using the sorting device 1 to sort the coarse solid waste, and using the screen 2 to screen out the silt and gravel;

[0041] 2) The mixture obtained in step 1) is transferred to the microwave heating pretreatment tank 3 for pretreatment;

[0042] 3) the pretreated mixture obtained in step 2) is transferred to the first primary sedimentation tank 4 for sedimentation;

[0043] 4) The first primary sedimentation sludge obtained after passing through the first primary sedimentation tank 4 in step 3) is transferred to the second primary sedimentation tank 5 for sedimentation, and the sludge obtained by the sedimentation is primary sewage sludge;

[0044] 5) mixing the first primary sedimentation supernatant obtained after step 3) passing through the first primary sedimentation tank...

Embodiment 2

[0054] see figure 1 , image 3 , a kind of method that utilizes food waste to produce clean energy provided by the present invention, comprises the following steps:

[0055] 1) Sorting the collected kitchen waste by using the sorting device 1 to sort the coarse solid waste, and using the sieve (2) to screen out the silt and gravel;

[0056] 2) The mixture obtained in step 1) is transferred to the microwave heating pretreatment tank 3 for pretreatment;

[0057] 3) the pretreated mixture obtained in step 2) is transferred to the first primary sedimentation tank 4 for sedimentation;

[0058] 4) The first primary sedimentation sludge obtained after passing through the first primary sedimentation tank 4 in step 3) is transferred to the second primary sedimentation tank 5 for sedimentation, and the sludge obtained by the sedimentation is primary sewage sludge;

[0059] 5) the first primary sedimentation supernatant obtained after the first primary sedimentation in step 3) through...

Embodiment 3

[0069] see figure 1 , image 3 , a kind of method that utilizes food waste to produce clean energy provided by the present invention, comprises the following steps:

[0070] 1) Sorting the collected kitchen waste by using the sorting device 1 to sort the coarse solid waste, and using the sieve (2) to screen out the silt and gravel;

[0071] 2) The mixture obtained in step 1) is transferred to the microwave heating pretreatment tank 3 for pretreatment;

[0072] 3) the pretreated mixture obtained in step 2) is transferred to the first primary sedimentation tank 4 for sedimentation;

[0073] 4) The first primary sedimentation sludge obtained after passing through the first primary sedimentation tank 4 in step 3) is transferred to the second primary sedimentation tank 5 for sedimentation, and the sludge obtained by the sedimentation is primary sewage sludge;

[0074] 5) the first primary sedimentation supernatant obtained after the first primary sedimentation in step 3) through...

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Abstract

The invention discloses a method for producing clean energy by utilizing kitchen waste. The method comprises the following steps: sorting out and screening out coarse solids and gravel in collected kitchen waste, performing microwave heating pretreatment, performing settling in a first primary settling tank, and performing settling in a second primary settling tank to obtain waste activated sludgeand primary sewage sludge, centrifuging the waste activated sludge, then performing hydrothermal carbonization, performing centrifuging to obtain wet hydrothermal carbon and hydrothermal carbonization liquid, performing acid production treatment on the hydrothermal carbonization liquid and the primary sewage sludge, then transferring the hydrothermal carbonization liquid and the primary sewage sludge to a leachate bed reactor for performing photo-fermentation degradation and a methane production anaerobic digestion reaction to obtain biogas and hydrogen, and drying the wet hydrothermal carbonby a solar dryer to obtain high-energy environment-friendly biological fuel. According to the method, digestibility in the anaerobic digestion process is improved, so that the residual amount of digestion residues is reduced. In addition, hydrothermal carbon, methane and hydrogen serving as biofuel energy sources can be obtained, so that energy sources are recycled.

Description

technical field [0001] The invention relates to the technical field of sewage sludge treatment, in particular to a method for producing clean energy by using 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 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L3/08C10B53/02C02F9/14C02F3/28C02F1/52C02F11/04C02F11/10C12P39/00C12P5/02C12P3/00C12R1/23C12R1/145C12R1/02C12R1/01C12R1/38
CPCC02F1/30C02F1/52C02F3/2893C02F9/00C02F11/04C02F11/10C10B53/02C10L3/08C10L2290/02C10L2290/08C10L2290/12C10L2290/24C10L2290/26C10L2290/546C12P3/00C12P5/023C12P39/00Y02E50/10Y02E50/30
Inventor 谢耀明
Owner 湖南三五二环保科技有限公司
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