Long active organic compounded fertilizer and production method

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...

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