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Long active organic compounded fertilizer and production method

A production method and compound fertilizer technology, applied in the direction of organic fertilizers, inorganic fertilizers, urea compound fertilizers, etc., can solve the problems of occupying large land resources, secondary pollution of groundwater resources, etc., achieve obvious fertilizer efficiency, good ion exchange, and realize Effects of harmless disposal and resource utilization

Inactive Publication Date: 2008-10-22
屈智和 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sewage treatment plants generally use piles or landfills to treat sludge, which not only takes up a lot of land resources, but also causes secondary pollution to the surrounding environment and groundwater resources.

Method used

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  • Long active organic compounded fertilizer and production method
  • Long active organic compounded fertilizer and production method
  • Long active organic compounded fertilizer and production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0072] (1) Raw materials and weight percentages are:

[0073] Sludge 10-40%, Zeolite 10-40%, Urea 20-45%,

[0074] Monoammonium Phosphate 5-20%, Potassium Chloride 2-12%, Sodium Silicate 3-5%,

[0075] The water content of the sludge is ≤10%, the zeolite is clinoptilolite, phillipsite or mordenite, and the potassium chloride can be replaced by potassium sulfate.

[0076] (2) Production process:

[0077] ① According to the water content of the sludge ≤ 10% and its required weight percentage, calculate the weight of the sludge with a water content of about 95% after nitrification in the required sewage treatment plant, and press it with a sludge press to make the water content 60% -70%.

[0078] ②Heat the 80-150 mesh zeolite to 120-150°C through a drum dryer, and fully stir and mix it with the squeezed sludge while it is hot.

[0079] ③ The mixture obtained in ② is air-dried naturally or dried by a drum dryer to make the water content ≤ 10%, and pulverized into a powder of 5...

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Abstract

The invention relates to a long-acting organic compound fertilizer and a manufacturing method thereof, which belongs to the manure field. By taking sludge in a municipal sewage treatment plant as main raw material, adding zeolite, urea, ammonium diacid phosphate, potassium chloride and sodium silicate, then being stirred and mixed with the urea, the ammonium diacid phosphate and the potassium chloride after sludge compression, zeolite drying, stirring and mixing, natural air drying or kiln drying and grinding, and spraying the sodium silicate so as to granulate, dry, disinfect and sterilize the mixture, a product is then produced. The long-acting organic compound fertilizer and the manufacturing method solve the problem of land occupation of the sludge in the sewage treatment plant and secondary pollution, and realize the harmless disposal and resource utilization of the sludge. The fertilizer ensures that crops has good growth power, high plants, more grains, stronger lodging resistance and obvious stimulation effect and ensures that the quality of agricultural products is improved. Furthermore, the fertilizer can increase the ability of reserving nutrients in soil, can modify acid or saline alkali sandy soil, can improve soil aggregate structure, can keep fertilizer efficiency and resist crop diseases.

Description

1. Technical field: [0001] The long-acting organic compound fertilizer and its production method of the present invention belong to the field of fertilizers, and in particular relate to an organic compound fertilizer made of sludge from an urban domestic sewage treatment plant as a main raw material, mixed with zeolite and the like. 2. Background technology: [0002] Sludge is the sediment produced during sewage treatment, usually accounting for 0.05-0.1% of the total sewage. There are 688 large, medium and small cities in my country, more than 20,000 towns, and an urban population of about 400 million. Taking 2004 as an example, the discharge of industrial wastewater was 22.2 billion cubic meters, and the discharge of urban domestic sewage was 26 billion cubic meters. Domestic sewage alone can produce 130-260 million tons of sludge. Sewage treatment plants generally use stacking or landfilling to treat sludge, which not only occupies a large amount of land resources, but al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05F7/00C05C9/00C05B7/00C05D1/02
CPCY02A40/20
Inventor 屈智和孙大晋
Owner 屈智和
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