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Method for preparing ecological organic fertilizer from organic waste

A technology of organic waste and organic fertilizer, which is applied in the environmental field, can solve the problems of complex process design and equipment, unpassivated heavy metals, and increased dehydration costs, so as to avoid difficult control of odor, accelerate the reproduction speed, and shorten the fermentation cycle. Effect

Inactive Publication Date: 2013-07-03
ROAD ENVIRONMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Landfill: The method is simple and easy, but because the waste contains harmful substances, it will pollute the groundwater with the erosion and seepage of rainwater, and the landfill needs to occupy a large area, and the construction and transportation costs of the landfill site are high. polluted environment
At the same time, the waste needs to be dehydrated to a lower moisture content, which will increase the cost of dehydration
[0005] 2. Incineration: construction costs a lot, and the operation cost of the incineration plant is high. In addition, the process design and equipment are complicated, and the requirements for the quality and technical level of the operators are relatively high.
In addition, harmful gases such as dioxins are produced, polluting the environment
[0006] 3. Utilization of building materials (municipal sludge): bricks made from sludge, ceramsite made from sludge, etc., but the technology is still immature and the scope of application is limited
[0007] 4. Composting: It can improve the soil and improve land use, but the composting time is long, generally takes about 30 days, and it covers a large area, and the pathogens are not completely killed. passivation, contaminated soil

Method used

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  • Method for preparing ecological organic fertilizer from organic waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Put 1 ton of municipal sludge (85% water content by weight) and 500kg of medicinal residue (10% water by weight) into the subcritical water reactor, then add NaOH to adjust the pH to 8, and pass steam into the reactor , adjust the temperature to 200°C, the pressure to 1.5MPa, turn on the mixer and stir to make it evenly heated, and react for 30min. After the reaction is completed, the sludge is further dried to a water content of 55% by weight.

[0039] Add 10.5 kg of bacillus, 2.5 kg of filamentous fungus, and 2.0 kg of mold, and mix evenly to make a heap. After 3 days, the temperature of the heap will rise to 60°C and keep at 55-70°C for 7 days; when the temperature exceeds 65°C, Turn the stack until the temperature does not change any more to obtain the finished product.

Embodiment 2

[0041] Put 1 ton of distiller's grains (water content 62% by weight), rice bran 600kg (water content 8% by weight) into the subcritical water reactor, then add NaOH to adjust the pH to 7.5, pass steam into the reactor to adjust the temperature To 230°C, pressure to 2.7MPa, turn on the mixer to stir to make it evenly heated, and react for 45min. After the reaction is completed, the organic waste is further dried to a water content of 50% by weight.

[0042] Add 12.6 kg of bacillus, 2.7 kg of filamentous fungi, and 2.7 kg of yeast, and mix evenly to make a heap. After 2 days, the temperature of the heap will rise to 70°C, and keep it at 55-70°C for 5 days. When the temperature exceeds 65°C , turn the stack until the temperature no longer changes, and get the finished product.

Embodiment 3

[0044] Put 1 ton of animal manure into the subcritical water reactor (water content percentage is 22%), straw 200kg (water content percentage percentage is 8%), then add NaOH to adjust the pH to 8.5, pass steam into the reactor to adjust When the temperature reaches 260°C and the pressure reaches 4.9 MPa, turn on the mixer and stir to make it evenly heated, and react for 40 minutes. After the reaction, the sludge was further dried to a moisture content of 55%.

[0045] Add 10.5 kg of bacillus, 2.5 kg of filamentous fungus and 2.5 kg of mold, and mix evenly to make a heap. After 3 days, the temperature of the heap will rise to 70°C and keep at 55-70°C for 6 days. When the temperature exceeds 65°C, Turn the stack until the temperature does not change any more to obtain the finished product.

[0046]

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Abstract

The invention relates to a method for preparing an ecological organic fertilizer from organic waste. The method comprises the following steps of putting the organic waste of which the moisture content is within 95% into a subcritical water reaction kettle, adding biomass which is 0-10% of the organic waste, feeding NaOH to the reaction kettle to adjust the pH to 7.5-8.5; leading steam into the reaction kettle, adjusting the temperature to 150-300 DEG C and the pressure to 0.5-5.0MPa to react for 15-60 minutes; baking or dewatering the product until the moisture content is 50-65%; feeding a microbial agent which is 0.5-1% of weight of the product to the baked or dewatered product; evenly mixing and then piling, heating the pile to 60-70 DEG C after 2-3 days to be stable, and carrying out heat preservation at 55-65 DEG C to maintain for 5-7 days, and turning when the temperature exceeds 65 DEG C and preparing the product until the temperature is not changed. By adopting the method, the limitation of the traditional aerobic fermentation is broken through; pathogene can be thoroughly killed; no bad smell or heavy metal pollution appears; the treatment cost is reduced; the treatment efficiency is improved; and the highest target of resource utilization of the organic waste is achieved.

Description

technical field [0001] The invention relates to a method for producing ecological organic fertilizer with organic waste in the field of environmental technology. Background technique [0002] Organic waste mainly includes municipal sludge, animal manure, crop residues, food, alcohol, beverage production waste, wood processing production waste, domestic garbage, etc. These substances mainly contain sugar, protein, cellulose, semi- Substances such as cellulose and lignin have potential utilization value for agriculture. [0003] At present, the treatment methods of organic waste mainly include the following types: [0004] 1. Landfill: The method is simple and easy, but because the waste contains harmful substances, it will pollute the groundwater with the erosion and seepage of rainwater, and the landfill needs to occupy a large area, and the construction and transportation costs of the landfill site are high. polluted environment. At the same time, the waste needs to be d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F17/00
CPCY02W30/40
Inventor 吕亮胡芳李盘根王实玉陈士强赵琴伍秀群张国梁张璠刘黎慧
Owner ROAD ENVIRONMENT TECH
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