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Biological soil conditioner containing phosphogypsum and application thereof

A technology of biological soil improvement and phosphogypsum, which is applied in the field of biological soil improver containing phosphogypsum, can solve the problems of resource waste, environmental pollution, large land occupation and stacking, etc., and achieve the goal of promoting crop growth, increasing land resources, and easy quality Effect

Inactive Publication Date: 2011-09-21
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] my country's phosphate fertilizer industry and phosphoric acid industry produce 30-50 million tons of phosphogypsum by-products every year, most of which are discarded, which not only takes up a lot of land for stacking, but also pollutes the environment and wastes resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0035] 1. Thoroughly disinfect the culture environment, including the culture pool, the tray, plastic bags, the culture room and the culture room air.

[0036] 2. The medium by weight percentage is: 10-30% wheat bran, 8-20% rice bran, 0.5-5% rapeseed meal, 0.5-5% peanut meal, 5-15% corn flour, 0-0.8% Magnesium sulfate, 0-0.6% ferrous sulfate, 0-0.5% calcium chloride, 0-0.2% potassium dihydrogen phosphate, mix with tap water to 100%, control the pH to 5-7, and make a solid medium; The solid medium is placed in a culture tank, a curved plate or a plastic bag.

[0037] 3. Put the above-mentioned materials in the bag in an autoclave for high temperature sterilization for 50-60 minutes, keeping the temperature in the autoclave at 121°C and the pressure at 0.15MPa.

[0038] 4. Take out the sterilized bagged culture medium, place it in the aseptic inoculation room to cool, and leave it for 2-3 days.

[0039] 5. Re-sterilize the sterilized bagged culture medium that has been placed for 2-3 d...

Embodiment 2

[0048] When preparing the culture medium in the present invention: 20Kg wheat bran, 15Kg rice bran, 3Kg rapeseed meal powder, 4Kg peanut meal powder, 15Kg corn flour, 0.5Kg magnesium sulfate, 0.2Kg ferrous sulfate, 0.1Kg calcium chloride, 0.2Kg phosphoric acid Potassium dihydrogen, 42Kg tap water, made into a solid medium with 42% water content, the total weight of the medium is 100Kg, and the pH is 5.8.

[0049] The inoculation amount of various bacteria is:

[0050] Inoculate Klebsiella 5Kg and Clostridium 3Kg first, and cultivate for 3 days;

[0051] Inoculate 6Kg of Bacillus megaterium and 5Kg of Pseudomonas, and cultivate for 2 days;

[0052] Then inoculate 6Kg of Pseudomonas fluorescens and 5Kg of Pseudomonas aeruginosa, culture for 3 days;

[0053] Finally, 8Kg of Rhodospirillum, 4Kg of Azotobacter chroococcus and 5Kg of cyanobacteria were simultaneously inoculated and cultured for 4 days.

[0054] After incubation, 930Kg of treated phosphogypsum powder was added for secondary fe...

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PUM

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Abstract

The present invention provides a biological soil conditioner containing phosphogypsum and application thereof. The biological soil conditioner is produced by industrialization, can utilize a solid waste of the phosphogypsum generated by phosphorus chemical industry enterprises, such as a phosphate fertilizer plant, a phosphoric acid plant and the like, in a recycling way, reduces the environmental pollution and can also obtain a large amount of beneficial microorganisms. The biological soil conditioner can improve saline-alkali soil, acid soil and coastal beach soil, enhances the productivity of the soil and promotes the growth of crops. The biological soil conditioner is prepared by the following steps of: culturing phosphate solubilizing bacteria, potassium solubilizing bacteria, self azotobacter and photosynthetic bacteria to a culture medium respectively by utilizing the culture medium, directly mixing with the already processed phosphogypsum powder evenly after culturing, adding water, regulating the water content to 35 to 45 percent, stacking for 4 to 7 days at room temperature and carrying out secondary cofermentation; and then, airing until the water content reaches 20 to 30 percent and obtaining a powdery mixture after pulverizing so as to obtain a product.

Description

Technical field: [0001] The invention relates to a biological soil conditioner containing phosphogypsum and multiple beneficial microorganisms and its application, in particular to a biological soil conditioner containing phosphogypsum for improving the alkalinity, nutrients and structure of saline soil, acid soil and tidal flat soil And application. Background technique: [0002] The process of wet production of phosphoric acid and phosphate fertilizer produces a large amount of solid waste residue-phosphogypsum. About 1-280 million tons of phosphogypsum are produced every year in the world. Usually, it is stacked on the ground without any treatment, occupying and wasting a large amount of land resources and causing serious problems. Environmental pollution. There are more than 400 phosphate fertilizer enterprises in my country, which produce 30-50 million tons of phosphogypsum waste residue each year. These waste residues are often untreated and stacked on the ground. Not only...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/00C12N1/20C12R1/01C12R1/065C12R1/385C12R1/39C12R1/38C12R1/11C12R1/145C12R1/22C09K101/00C09K109/00
Inventor 吴洪生刘正柱申双和
Owner NANJING UNIV OF INFORMATION SCI & TECH