Waste continuous solid fermenting reacting device and solid fermenting method

A solid-state fermentation and reaction device technology, applied in solid-phase fermentation bioreactors, biochemical equipment and methods, gas production bioreactors, etc., can solve the problem of uneven mixing of fermentation substrates and bacteria, reduce fermentation production efficiency, The problem of uneven distribution of fermentation substrates, to achieve the effect of strengthening the solid-state fermentation reaction process, the device structure is simple, and the fermentation speed is accelerated

Inactive Publication Date: 2012-11-14
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2008, my country produced 15 million tons of distiller's grains and 8 million tons of vinegar grains. However, these grains are acidic or alkaline, which is a serious source of environmental pollution.
The existing continuous solid-state fermentation reaction device has problems such as uneven mixing of the fermentation substrate and the strain after the scale-up production, and uneven distribution of the fermentation substrate in the fermentation tank, which seriously reduces the fermentation production efficiency
In addition, the solid-state fermentation process lacks process integration, and there are still many fermentation residues in the solid-state fermentation process of waste, which need to be further processed. Therefore, the development of biological and chemical coupling processes can greatly reduce the operating costs of the solid-state fermentation process

Method used

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  • Waste continuous solid fermenting reacting device and solid fermenting method
  • Waste continuous solid fermenting reacting device and solid fermenting method
  • Waste continuous solid fermenting reacting device and solid fermenting method

Examples

Experimental program
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Effect test

Embodiment 1

[0050] The cultivation of embodiment 1 microbial catalyst

[0051] The microbial catalyst strain is an enriched anaerobic methanogenic microbial flora, the culture temperature is 37°C, the culture environment is anaerobic, and the culture time is 25 days.

[0052] The medium formula required for cultivation is (g / L):K 2 HPO 4 0.4, KH 2 PO 4 0.4, NH 4 Cl1.0, MgCl 2 1.0, yeast extract 1.0, cysteine ​​0.5. 0.1% resazurin 2.0mL, trace element solution 10.0mL, vitamin solution 10.0mL.

[0053] The composition of above-mentioned trace element solution is (g / L):MgSO 4 ·7H 2 O3.0, CoCl 2 0.1, MnSO 4 2H 2 O0 5, CaC1 2 2H 2 O0.1, ZnSO 4 ·7H 2 O0.1, NaCl1.0, FeSO 4 ·7H 2 O0.1, CuSO 4 ·5H 2 O0.01, KAl(SO 4 ) 2 0.01,H 3 BO 3 0.01, NaMoO 4 2H 2 O0.01.

[0054] The composition of above-mentioned vitamin solution is (mg / L): Thiamine (B l )5.0, calcium pantothenate 5.0, riboflavin (B 2 )5.0, biotin 2.0, folic acid 2.0, Bl:0.1, niacin 5.0, p-aminobenzoic acid 5.0, lip...

Embodiment 2

[0056] Example 2 Microbial anaerobic treatment of kitchen waste to produce biogas

[0057] First, the collected kitchen waste is extruded to remove most of the water, and the microbial catalyst cultivated in the above-mentioned embodiment 1 is centrifugally concentrated by a high-speed centrifuge, and 0.1 kg of the microbial catalyst with a concentration of 25 g dry cells / L is mixed with 5 kg of extruded The compressed kitchen waste is fully mixed and fermented in a circular solid-state fermentation reactor. The reactor is divided into 6 equal parts by internal components. The fermentation temperature is 37°C, the fermentation time is 18 days, and the fermentation pressure is normal pressure. Separated to produce 52.3 liters of biogas.

Embodiment 3

[0058] Example 3 Production of biogas by anaerobic fermentation of distiller's grains

[0059] The microbial catalyst cultivated in the above-mentioned Example 1 was centrifuged and concentrated by a high-speed centrifuge for subsequent use. Install a certain rate into the solid-state fermentation reactor, and mix evenly with a certain rate of microbial strains through the baffle. The concentration of the microbial catalyst is 1g dry cells / L, the quality is 2kg, and the amount of distiller's grains is 10kg. In the square solid-state fermentation reaction Fermentation in the container, the square reactor is divided into 8 equal parts by the internal components, the fermentation temperature: 37 ° C, the fermentation time is 30 days, the pressure of the fermentation is normal pressure, the fermentation product is separated, the collected gas volume is 150L, ​​and the final quality of the fermentation product is 3kg, achieving volume reduction.

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Abstract

The invention relates to the field of waste treatment and utilization, in particular to a waste continuous solid fermenting reacting device and a solid fermenting method. The waste continuous solid fermenting reacting device comprises a mixing tank (4) and a fermenting tank (5) below the mixing tank (4), wherein a strain inlet (6) and a material inlet (10) are arranged at the upper part of the mixing tank (4); a plurality of baffles (1) positioned below the strain inlet (6) and the material inlet (10) are arranged in the mixing tank (4); and the baffles (1) are staggered and inclined from two sides to the underside, and are all extended out of a centre line. According to the waste continuous solid fermenting reacting device and the solid fermenting method, uniform inoculating is achieved with the baffles and a flow dividing device; and a separating plate is adopted to enhance the transfer of the heat and the mass, so that the fermenting tank is uniformly divided into a plurality of small reacting spaces, and as a result, the substrates can be uniformly fermented, and the fermenting speed is increased; enhancing the waste solid fermenting reacting process is beneficial to expanding the solid fermenting as well as the production application.

Description

technical field [0001] The invention relates to the field of waste treatment and utilization, in particular, the invention relates to a waste continuous solid-state fermentation reaction device and a solid-state fermentation method. Background technique [0002] China is one of the countries with the heaviest garbage burden in the world. At present, the total amount of urban waste piled up in the country is as high as 7 billion tons, and the amount of generation is increasing at a rate of about 8.98% every year. Of the more than 600 large and medium-sized cities across the country, 70% are surrounded by garbage. China's annual output of "urban waste" alone is nearly 150 million tons, most of which are piled up in the open. During the decay process of garbage, a large amount of heat energy is generated, mainly harmful gases such as ammonia, methane, and hydrogen sulfide. If the concentration is too high, it will form a stench, seriously pollute the atmosphere, emit heat, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12M1/16C12M1/107C12P5/02
CPCC12M23/34Y02E50/343C12M27/20C12M21/16Y02E50/30
Inventor 李望良汪印张光义许光文
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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