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A method of using kitchen waste and sludge to produce combustible gas

A kitchen waste and sludge technology, which is applied in sludge treatment, biological sludge treatment, chemical instruments and methods, etc., can solve the problem of low combustible gas production rate, achieve stable gas output, slow down pH drop, and fast speed Effect

Active Publication Date: 2022-02-01
郑鲁生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problem of low yield of combustible gas produced by anaerobic fermentation, the present invention provides a method for producing combustible gas by using kitchen waste and sludge, which can produce gas in a short time without adding additional microbial strains, and can simultaneously Two types of waste are treated

Method used

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  • A method of using kitchen waste and sludge to produce combustible gas
  • A method of using kitchen waste and sludge to produce combustible gas
  • A method of using kitchen waste and sludge to produce combustible gas

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Example 1 Production of combustible gas

[0030] A custom-made 50L jacketed reactor is used. There are 5 pairs of electrode rods evenly arranged in an array at the bottom of the reactor. The positive pole is carbon rods, and the negative pole is stainless steel. . The pressure in the tank is greater than 0.20MPa, and the gas is released automatically.

[0031] (1) The kitchen waste containing green plants is pre-crushed into 10 meshes, and then mixed with reclaimed water treatment sludge with a water content of 80% in a mass ratio of 3:1 to form a fermented slurry with a solid content of 8%;

[0032] (2) After the negative pressure of the vacuum fermentation tank is pumped to -0.05MPa, the fermentation slurry is pumped in so that the fermentation slurry does not pass through the electrodes; the discharge treatment is carried out in the first 3 days after feeding, and the discharge is performed when the pressure in the tank is lower than 0.25MPa. Stop discharging when ...

Embodiment 2

[0053] Example 2 Gas composition detection

[0054] The combustible gas obtained on the 4th day in each embodiment and comparative example was dried by Shimadzu GC-7A gas chromatograph, and then the components were detected. Dry gas chromatographic conditions before detection are as follows:

[0055] Column temperature: 70°C;

[0056] Inlet temperature: 95°C;

[0057] Thermal conductivity detector (TCD) temperature: 80°C;

[0058] Carrier gas: high-purity argon;

[0059] Flow: 30mL / min;

[0060] Chromatographic column: stainless steel column filled with carbon molecular sieve, 3m×3mm;

[0061] Injection volume: 1000 μL;

[0062] The gas analysis spectrum of embodiment 1 is as figure 2 shown. The contents of different components in each gas were calculated, and the results are shown in Table 1.

[0063] Table 1 Comparison of gas composition and content in different gas samples

[0064]

[0065] It can be seen from the data in Table 1 that among the gas samples, th...

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Abstract

The invention provides a method for producing combustible gas by using kitchen waste and sludge. Pump the fermented slurry into the fermentation tank after pumping negative pressure, so that the fermented slurry does not pass through the electrodes, and direct current discharge treatment can generate combustible gas; (3) Drain the residual liquid in the tank and add new fermented slurry. The method for producing combustible gas of the present invention can produce gas in a short time, and the speed of waste treatment is fast; no additional microbial strains are needed, and two kinds of waste can be treated at the same time; the residue after treatment contains amino acids, which can be prepared into organic Fertilizer, can be popularized for urban waste treatment.

Description

technical field [0001] The invention belongs to the field of recycling and harmless utilization of kitchen waste in the environmental protection industry, and in particular relates to a method for producing combustible gas by using kitchen waste and sludge. Background technique [0002] The use of renewable biomass resources to produce biomass energy that can replace fossil energy has attracted increasing attention. At present, biomass energy utilization technologies include solidification molding, thermochemical conversion, and anaerobic fermentation. Among them, the anaerobic fermentation technology represented by methane-producing fermentation mainly uses anaerobic microorganisms to convert biomass into CH 4 , CO 2 or H 2 . CH 4 It has a high combustion calorific value (802.3kJ / mol), and is an ideal energy substance. Anaerobic fermentation technology can realize environmental purification while producing clean energy, and the fermentation residue can also be used as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P5/02C12P3/00C02F11/04C02F11/00
CPCC12P3/00C12P5/023C02F11/006C02F11/04Y02E50/30
Inventor 郑鲁生
Owner 郑鲁生
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