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Composite conditioner for preparing sludge compost and application thereof

A technology of conditioner and sludge, which is applied in the field of compound conditioner for preparing sludge compost, can solve the problems of decreased support pore structure performance, low porosity, slow degradation, etc., achieve rich trace element content and increase C/N ratio , Improve the effect of fertilizer efficiency

Inactive Publication Date: 2010-12-15
娄底市裕德科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sludge has high moisture content, low porosity, and the addition of flocculants in the dehydration process is easy to agglomerate, which is not conducive to ventilation and oxygen supply during the composting process, and the C / N ratio of the sludge is low, so that the nitrogen in the waste is converted into NH 3 The formation of volatile loss, emits a bad smell, which is not conducive to the growth of microorganisms, and conditioners need to be added when composting
The traditional conditioner is directly added to wood chips, sawdust, bark, rice husk, straw, bagasse, but this kind of conditioner contains high content of refractory polymer substances such as cellulose, hemicellulose, pectin, and the degradation is slow. The fermentation period is as long as 30-50 days, and the performance of the supporting pore structure after composting is reduced, making it impossible to adjust the structure of the compost material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] (1) The fermented product of agricultural waste in this embodiment is that the agricultural waste is pulverized by a pulverizer to a particle size of 0.2~2cm, sprayed with water, so that the moisture content reaches 30%~60% of the mass percentage, and piles up to 1.5~2cm. For 3.5m stacks, control the high-temperature fermentation temperature at 55-75°C, turn the stack once every 2-3 days, and stack and ferment for 15-30 days in total; obtain fermented agricultural waste products;

[0014] (2) Take the above fermented agricultural waste and mix perlite with a particle size of less than 0.5cm at a volume ratio of 8:3; it is a conditioner.

[0015] Conditioning agents used in the preparation of sludge compost:

[0016] (1) Mix the sludge with a moisture content of less than 80% and the compound conditioner at a mass ratio of 1:0.1~3, so that the carbon-nitrogen ratio is between 20:1~30:1;

[0017] (2) The mixed material is piled up into stacks with a height of 1m~2m, and ...

Embodiment 2

[0020] (1) The fermented product of agricultural waste in this embodiment is that the agricultural waste is crushed by a pulverizer to a particle size of 0.2~2cm, sprayed with an appropriate amount of water, so that the moisture content reaches 30%~60% of the mass percentage, and 0.5% ~5% of Aspergillus niger, Trichoderma viride, and Aspergillus oryzae mixed fermentation bacteria were mixed evenly, and then piled up into stacks of 0.3~1m. ~7 days. Obtain agricultural waste fermented products;

[0021] (2) Take the mixture of the above-mentioned fermented agricultural waste products and perlite, vermiculite, zeolite and medical stone with a particle size of less than 0.5cm; the volume ratio of the fermented agricultural waste products to the mixture is 2:8. That is conditioner.

Embodiment 3

[0023] (1) The fermented product of agricultural waste in this embodiment is that the agricultural waste is pulverized by a pulverizer to a particle size of 0.2~2cm, sprayed with an appropriate amount of water, so that the moisture content reaches 30%~60% of the mass percentage, and is piled up to 1.5 ~3.5m stacks, the temperature of high-temperature fermentation is controlled to be 55~75°C; the fermentation process uses a compost turner to turn the pile once every 2~3 days, and the temperature and ventilation are controlled; the overall fermentation time is 7~15 days; agricultural waste fermented products are obtained ;

[0024] (2) Take the above-mentioned fermented agricultural waste products and the conditioner perlite, vermiculite, zeolite, and medical stone with a particle size of less than 10cm, and mix them at a volume ratio of 5:3. That is conditioner.

[0025] Applications for preparing sludge compost:

[0026] (1) Mix the sludge with a moisture content of less tha...

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Abstract

The invention discloses a composite conditioner for preparing a sludge compost and application thereof. The composite conditioner for preparing the sludge compost is combined by an agricultural waste fermentation product and non-metallic ore powder in a volume ratio of 1-10:5-1, wherein the agricultural waste fermentation product is prepared by performing direct pile fermentation on one or a mixture of more of sawdust, barks, rice hulls, straw and bagasse or adding zymophyte for aerobic fermentation; and the non-metallic ore powder is one or more of pearlite, vermiculite, zeolite, medical stone and sepiolite with the grain size of smaller than 0.5cm. The composite conditioner can quickly degrade cellulose, shorten the sludge fermentation period to 7-15 days, improve the C / N ratio of the sludge and reduce the diffused odor, also can adjust the pH value of mixed materials, is more favorable for the growth of microorganisms, and can improve fertilizer efficiency and improve the soil.

Description

technical field [0001] The invention relates to a compound conditioner for preparing sludge compost. Background technique [0002] During the treatment process of urban sewage treatment plants, a large amount of sludge is produced, which contains a large amount of organic matter, rich in nutrients such as nitrogen and phosphorus, pathogenic bacteria and pathogenic bacteria, etc. Any discharge without treatment will cause serious pollution to the environment. With the further development of urbanization, new sewage treatment plants will continue to be built, which will inevitably produce a greater amount of sludge. Solving the problem of the outlet of such a large amount of sludge has become a top priority for sewage treatment. The method of sludge composting is an ideal sludge treatment method that integrates sludge reduction, harmlessness, stabilization and resource utilization. It not only makes full use of the nitrogen, phosphorus and potassium needed for plant growth an...

Claims

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Application Information

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IPC IPC(8): C05F7/00C05F17/00
CPCY02A40/20Y02W30/40
Inventor 王韬
Owner 娄底市裕德科技有限公司
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