Method for producing particle organic fertilizer through activated sludge

Abstract

The invention discloses a method for producing particle organic fertilizer through activated sludge and belongs to the technical field of fertilizer preparation. According to the method for producing the particle organic fertilizer through the activated sludge, sludge from a sewer system and sludge from the bottom of a pond are fully utilized to conduct aeration, then wheat bran and straws are added to conduct hardening culture and fully-mixing and fermentation, and the organic fertilizer is obtained. The method for producing the particle organic fertilizer through the activated sludge has the advantages that the nitrogen content of the organic fertilizer ranges from 20% to 28%, the phosphorus content ranges from 18% to 22%, the yield of crops is increased by 20-30 kg each mu after the fertilizer is used, and the fertilizer effect is good; the soil structure can be improved, nutritious ingredients required by crops are provided, and growth of crops is effectively promoted; the sludge from the sewer system and sludge from the bottom of the pond are fully utilized, the wheat bran and straws are added to conduct hardening culture and fully-mixing and fermentation so as to obtain the organic fertilizer, waste materials are changed into things of value, renewable resources and economic development are achieved, the problem of environmental pollution caused by sludge is solved, occupation of land resources is reduced, and the living environmental quality of the surrounding residents is improved.

Description

technical field [0001] The invention relates to a method for producing granular organic fertilizer from activated sludge, belonging to the technical field of fertilizer preparation. Background technique [0002] With the development of urbanization in my country and the popularization of aquatic animal breeding industry, domestic sewage and aquaculture wastewater have increased greatly, and the resulting surplus sludge production will continue to increase; sludge contains a large amount of organic matter, and if it is not properly treated, it will be destroyed. It causes different degrees of pollution to the ecological environment. The current sludge treatment methods are accumulation incineration and landfill, but accumulation incineration will cause secondary pollution to the environment, landfill will occupy a large amount of land resources, and the investment cost is high and the treatment effect is poor. [0003] Sludge contains a large amount of nutrients such as nitrog...