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Green composting method for organic waste

A technology of organic waste and composting method, applied in the field of aerobic composting of organic solid waste, can solve the problems of heavy metal pollution, secondary pollution, long-term effect doubts, etc., and achieve the effect of maintaining nitrogen and promoting decay

Inactive Publication Date: 2019-09-27
JIANGSU LIXIAHE REGION AGRI RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regardless of the nitrogen retention effect of the additive immobilization method, there is a risk of heavy metal pollution in biochar and metal salt materials, which leads to the risk of secondary pollution in the composting process; The long-term effect of the acid is doubtful; while the polymer water-absorbing agent effectively absorbs the nitrogen aqueous solution, it also inhibits the water dissipation of the compost, which may reduce the composting efficiency, which is not conducive to the actual production process of the fertilizer enterprise

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The dry-wet separated cow dung (55% moisture content) is piled up in strips, with a height of 1.2m, a width of 2.2m and a length of 3.5m. Set up two treatment groups (120g / t, 240g / t) with different dosages of polyaspartic acid, and take blank as control. Use an equal amount of decomposed cow dung (1kg) or rice chaff (1kg) to mix with it evenly, and then evenly apply it to the pile during the process of building the pile; every 2 days, use a turning machine to turn at a speed of 1800r / min Heap once until the temperature of the compost body drops to about room temperature, and the composting ends. At 10:00 am and 4:00 pm every day, insert a thermometer into the pile body 30cm from different directions to measure the current temperature, and record the ambient temperature. Compost samples were collected at 0, 5, 10, 17, 24, 31, and 39 days, 3 kg each time, including 1 kg of fresh samples for gas determination, 1 kg of fresh samples for other indicators and 1 kg of air-dri...

Embodiment 2

[0031]Mix fresh chicken manure with rice husk according to a certain ratio, so that the moisture content of the mixed pile is 61%, and the carbon-nitrogen ratio is 19.6. According to 2% of the total nitrogen content of the pile, the amount of PASP to be added is set. After mixing it with 1 kg of decomposed compost, in the process of building a pile of chicken manure and rice husks, after spreading layer by layer, use a forklift to build the pile. The size of the stack is 1.5 meters high, 1.5 meters wide, and 20 meters long. After 24 hours, the temperature of the pile rose to 59°C, and the pile was turned over every 2 days. In addition, the natural compost without PASP was used as the control group, and the composting parameters remained the same, and the composting started at the same time. Measure the volatilization of ammonia in each compost during the whole process of composting; measure the content of total nitrogen, available nitrogen and seed germination rate index on t...

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Abstract

The invention relates to a green composting method for organic waste. The method comprises the following steps: firstly, adding straw and a rice husk conditioning agent to a composting raw material, and adjusting the physical and chemical properties of the organic waste to obtain a composting material; then uniformly mixing a nitrogen element intercepting material with rice chaff or mature compost to obtain a blending material, uniformly applying the blending material into the composting material in the process of building a pile, piling the composting material added with the blending material into a strip buttress shape to obtain a compost heap body, and standing and heating up; then regularly monitoring the temperature of the heap body when the compost heap body starts fermentation, turning the heap when the temperature of the compost heap body is greater than or equal to 55 DEG C, and then turning the heap once every 2 days. finally realizing harmlessness of the compost heap body when the temperature of the compost heap body is higher than 55 DEG C and lasts 7 days or above, and obtaining a stable composting product after the temperature of the compost heap body drops to the set temperature. Through the method, environmental protection and pollution-free effects are achieved, degradation can be complete, and both nitrogen retention and maturity promoting functions are realized.

Description

technical field [0001] The invention relates to a green composting method for organic waste, which belongs to the field of aerobic composting of organic solid waste. Background technique [0002] Organic waste resources have become an important source of agricultural non-point source pollution because they cannot be used reasonably and effectively. After organic waste is fermented by high-temperature aerobic fermentation, it can achieve the goals of harmlessness, reduction, and recycling. It is one of the more effective utilization methods at present. However, after the end of aerobic composting, there is a certain loss of nitrogen. Therefore, the key to improving the quality of composting is how to reduce the loss of nitrogen during the composting process. Studies have shown that there are three main pathways for nitrogen loss in compost. First, high temperature and high pH cause NH 3 Volatilization accounts for the highest proportion of total nitrogen loss, up to 63% (th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00C05F17/00
CPCC05C11/00C05F17/00C05F3/00C05F5/002Y02W30/40
Inventor 徐荣王守红韩光明张家宏寇祥明王桂良吴雷明朱凌雨唐鹤军毕建花
Owner JIANGSU LIXIAHE REGION AGRI RES INST
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