Method for preparing organic composite fertilizer by micro-wave pretreatment of solid organic waste material

A technology of organic waste and microwave treatment, applied in the direction of organic fertilizer, fertilizer made of biological waste, fertilization device, etc., can solve limited problems, achieve the effects of reducing fermentation cycle, accelerating decomposition speed, strengthening oxygen supply and heat transfer

Inactive Publication Date: 2008-03-12
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, many studies have shown that the method of artificially inoculating microorganisms to improve the rate of composting is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Take the volume as 2M 3 Add appropriate amount of sawdust to increase its porosity, adjust the water content of the material to 70wt%, and adjust the C / N at the same time; acidify it with sulfuric acid, the pH is 4, and send the mixed material to the power Microwave treatment is carried out in a 20KW gallery-type microwave processor. The microwave wavelength is 2450MHz, the power is 10KW, the temperature of the material is controlled at 60-120°C, and the total processing time is 60 minutes; Compost fermentation. At the same time, the pig manure mixture without microwave treatment was composted and decomposed as a control, and the decomposing time was determined according to the content of ammonium nitrogen, C / N and humic acid. The maturity time of pig manure without microwave pretreatment is 34 days, while that of pig manure after microwave treatment is 15 days, which is more than doubled. Blend the decomposed organic material with nitrogen fertilizer, phosphorus fert...

Embodiment 2

[0051] First cut the straw into 1-3 cm pieces, add an appropriate amount of water and mix well to make the water content reach 60wt%; acidify it with phosphoric acid, and then put the straw into a microwave processor with a microwave wavelength of 915MHz , the power is 750W, and the treatment takes 20 minutes. Thereafter the wheat straw that has been processed is transferred in the solid reactor of 50L, inserts the bacterial classification that accounts for 10% of material weight (the mixed bacteria of pectin hydrolytic bacteria, nitrogen-fixing bacteria and cellulolytic bacteria), at 30 ℃ Carry out atmospheric pressure fermentation; after 9 days of fermentation, the decompression is completed, and then compounded with an appropriate amount of urea, diammonium phosphate and potassium sulfate, after mixing, the water content is adjusted, and the organic Compound fertilizer, the contents of organic matter, N, P and K in the organic compound fertilizer are respectively 27wt%, 15w...

Embodiment 3

[0053] Take the waste residue from the sugar factory and crush it into 8-purpose scrap (the water content is 75 wt%), acidify it with sulfuric acid, and put it into a 1000W microwave processor for 12min (the microwave wavelength is 915MHz, and the power is 20KW); Waste residue is put into solid fermentation tank again, inserts the bacterial classification (the mixed bacteria of thermophilic bacteria, actinomycetes and protein and pectin hydrolysis bacteria) of 5% of solid material weight, carries out periodical variable pressure fermentation; Ferment for 30 minutes, increase the tank pressure to 0.1-0.5MPa within 2 minutes, keep the pressure under this pressure for 1-3 minutes, and then quickly drop to normal pressure within 1 minute; under the alternating action of high and low pressure, the solid organic waste material Fermentation is carried out, and the above operations are always used throughout the fermentation process to keep the tank pressure in a state of cyclical fluc...

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Abstract

The present invention discloses a method to make a microwave pretreatment to a solid organic waste material and then to prepare an organic composite fertilizer. The technics process is that: the solid organic waste material is to be crushed and then screened into a grain shape; the solid organic waste material includes crop straw stalk, domestic animal dejection, sugar-refinery waste residue or food garbage; the pH value of the solid organic waste material is to be adjusted to acid by a acid adjustable material; the solid organic waste material is pretreated by a microwave radicalization; the solid organic waste material after being pretreated with microwave is to be naturally stored or inoculated with microbe bacterium to be fermented. The organic substance after being fermented is to be mixed and milled with nitrogen, phosphor and kalium fertilizer. And then the organic composite fertilizer can be obtained. Because of adopting the pretreatment to the organic substance with microwave, the penetrated force is much stronger, the heat speed is fast and even; besides the present invention can sterilize and change the molecule structure for the organic substance quickly so as to shorten the corrupted mature period for the next stored fertilizer to 2-5 times; the present invention plays very importance to the environment protection and the development of the zoological agriculture.

Description

technical field [0001] The invention belongs to the field of clean treatment and resource utilization of organic solid waste, and in particular relates to a method for preparing organic compound fertilizer by microwave pretreatment on solid organic matter. technical background [0002] Waste materials refer to the discarded substances that no longer have the original use value and are generated in a series of activities such as social production, circulation, and consumption. Solid organic waste refers to the above-mentioned solid substances with high organic matter content, mainly including planting waste (such as crop straw), aquaculture waste (such as livestock and poultry manure), industrial waste (such as sugar factory waste) and Household garbage, etc. With the rapid development of people's production activities and the vigorous advancement of urbanization, the amount of solid organic waste is also increasing rapidly. According to statistics, my country produces more...

Claims

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Application Information

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IPC IPC(8): C05G1/00C05F3/00C05F5/00
CPCY02A40/20
Inventor 张小勇莫海涛
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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