Method for resource recycling of phosphorus in breeding waste

Abstract

The invention provides a method for resource recycling of phosphorus in breeding waste. The method comprises the following steps that (1) pulse ultrasonic treatment is conducted on the breeding waste; (2) the breeding waste treated in the step (1) is introduced into a wet type chemical oxygenizer and oxidized under the action of an oxidizing agent; (3) a magnesium solution and a pH value regulating agent are added into supernate of the breeding waste treated in the step (2), and pulse microwaves are applied to the mixed solution; (4) the mixed solution treated in the step (3) is introduced into a crystallizing bed, bird dung crystal mud and supernate are obtained after the mixed solution is crystallized, and the bird dung crystal mud is collected; and (5) the supernate obtained in the step (4) is introduced into an adsorption column, and ferric oxide hydrate-carried charcoal after adsorption is collected with ferric oxide hydrate-carried charcoal as an adsorbent. According to the method, the pulse ultrasonic and advanced oxidation coupling technique is adopted, and the phosphorus release rate and the organophosphorus conversion rate are high; the bird dung crystal and ferric oxide hydrate-carried charcoal adsorption coupling technique is adopted, and thus phosphorus loss rate is low.

Description

technical field [0001] The invention relates to a method for resource recovery of phosphorus in farming waste, belonging to the technical field of agricultural resources and environment. Background technique [0002] Phosphorus is not only a non-recyclable and increasingly scarce precious resource, but also an important factor causing eutrophication of water bodies. According to the "2014 Mineral Summary" released by the US Geological Survey in January 2015, the world's phosphate rock reserves are 67 billion tons, and China's phosphate rock reserves are 3.7 billion tons, ranking second in the world. However, due to the low proportion of high-grade phosphate rock resource reserves in my country, and the annual mining volume of phosphate rock in recent years has accounted for one-third of the global phosphate rock mining volume, my country's high-quality phosphate rock will be in less than 20 years. Time runs out. Therefore, the recovery of phosphorus resources lost in enviro...

AI Technical Summary

Problems solved by technology

The problems that restrict the recovery of phosphorus resources in livestock and poultry wastes mainly include several aspects: First, most of the phosphorus in aquaculture wastes exists in the solid phase, and exists in two forms: organic phosphorus and inorganic phosphorus. Phosphorus is difficult to recycle directly; second, the organic accompanying substances in the farming waste will interfere with the recovery of inorganic phosphorus, resulting in the loss of a large amount of phosphorus

[0004] Therefore, it is necessary to develop a method for resource recycling of phosphorus in aquaculture waste, which can realize the release of phosphorus from the solid phase and the conversion of organic form phosphorus on the one hand, and on the other hand, can also realize the efficient recovery of phosphorus in the liquid phase. The key content of research and practice, there is no literature report and patent disclosure

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