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Closed negative pressure aerobic composting system and composting method

An aerobic composting and negative pressure technology, applied in the field of composting, can solve the problem of difficulty in ensuring the moisture content of composting products, and achieve the effect of increasing nutrition

Active Publication Date: 2022-05-17
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to guarantee the moisture content of the compost products produced by the negative pressure suction process.

Method used

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  • Closed negative pressure aerobic composting system and composting method
  • Closed negative pressure aerobic composting system and composting method

Examples

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Effect test

Embodiment 1

[0041] 1) Design of composting reactor:

[0042] A cylindrical composting reactor is used: 50cm in diameter and 90cm in height. The bottom of the composting reactor (10 cm above the positive electrode) is provided with perforated ventilation pipes. Cotton fibers are wrapped on the outer wall of the reactor for thermal insulation of the reactor. At the same time, an online thermometer is set in the barrel to record the temperature change of the compost in real time.

[0043] 2) Compost raw materials and their ratio:

[0044] Chicken manure is used as the main material of compost, rice husk is used as auxiliary material, and the ratio is: 1:1 (volume ratio). Stir the above raw materials and ingredients evenly so that the water content is 70-75%; put the evenly stirred feces into a designed composting reactor, connect a DC power supply, and perform aerobic composting.

[0045] 3) Operating parameters:

[0046] Compost at room temperature. The aeration adopts intermittent pu...

Embodiment 2

[0048] 1) Design of composting reactor:

[0049] A strip-shaped composting reactor is used: length 120cm, width 100cm, height 100cm. The bottom of the composting reactor (10 cm above the positive electrode) is provided with a perforated vent pipe. The reactor is built with solid lime-sand brick walls for maximum insulation. At the same time, an online thermometer is set in the reactor to record the temperature change of the compost in real time.

[0050] 2) Compost raw materials and their ratio:

[0051] Chicken manure is used as the main material of compost, rice husk is used as auxiliary material, and the ratio is: 1:1 (volume ratio). Stir the above raw materials and ingredients evenly so that the water content is 70-75%; put the evenly stirred feces into a designed composting reactor, connect a DC power supply, and perform aerobic composting.

[0052] 3) Operating parameters:

[0053] Compost at room temperature. The aeration adopts intermittent pumping method, the fr...

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Abstract

The invention discloses a closed negative pressure aerobic composting system and a composting method, and relates to composting technology. The system comprises: a composting reactor heat preservation layer, a composting reactor inner wall, a reactor top cover outer wall, a water-absorbing heat preservation layer, and heating with holes plate, circulation exhaust pipe, tail gas discharge pipe, tail gas return pipe, aeration pipe and exhaust fan; through the water absorption insulation layer of the above reactor, the moisture in the gas can be absorbed, and at the same time, the tail gas can be recovered based on the circulation exhaust pipe, so that the gas The heat is retained in the reactor, and through cyclic adsorption, the odor of the exhaust gas from the reactor can be reduced, and the ammonia nitrogen gas can be left in the compost to increase the nutrition of the fertilizer.

Description

technical field [0001] The invention relates to composting technology, in particular to a closed negative pressure aerobic composting system and a composting method. Background technique [0002] Aerobic composting treatment technology is a kind of sludge harmless treatment and resource utilization technology that uses microorganisms to biodegrade perishable organic matter in organic solid waste to make it into a humus-like fertilizer with good stability. The main factors of aerobic composting include: temperature, moisture, moisture content and oxygen supply. Among them, the oxygen supply is the main control parameter in the process of composting operation, which is adjusted by the ventilation. [0003] Ventilation and oxygen supply methods mainly include: (1) Natural diffusion: There is a difference in oxygen concentration between the surface and the interior of the material stack, and oxygen diffuses from the stack surface to the inside by using the natural diffusion of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05F17/964C05F17/979C05F17/80C05F17/60C05F15/00C05F17/00
CPCY02W30/40
Inventor 唐家桓上官华媛付涛曾建雄周顺桂
Owner FUJIAN AGRI & FORESTRY UNIV
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