Method for resource recycling of phosphorus in breeding waste

A breeding waste and recycling technology, applied in the field of agricultural resources and the environment, can solve the problems of difficulty in recycling organic phosphorus, loss of phosphorus, interference with inorganic phosphorus recovery, etc.

Active Publication Date: 2015-12-02
CHINA AGRI UNIV
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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

Method used

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  • Method for resource recycling of phosphorus in breeding waste

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Experimental program
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Effect test

Embodiment 1

[0060] Embodiment 1, resource recycling of phosphorus in livestock and poultry breeding waste

[0061] like figure 1 As shown, follow the steps below to recycle the phosphorus in the farming waste:

[0062] (1) Control the solid content rate of 20 mg / g phosphorus content 20 mg / g livestock and poultry breeding waste at 30%, introduce ultrasonic pre-oxidation tank 1, under the condition of power 100W, temperature 40 ℃, frequency 30MHz, pulse type ultrasonic action 120min (operating 1min, stop 1min).

[0063] (2) According to the ratio of the volume of waste: the volume of the wet chemical oxidizer 1:3, the waste treated in step (1) is introduced into the wet chemical oxidizer 2, and the sequence batch reaction is carried out at a temperature of 300°C for 240 minutes , using ozone as an oxidant, with a partial pressure of 1.5MPa, the amount of phosphorus released after the reaction reaches 20mg / g, the phosphorus release rate reaches 100%, the amount of inorganic phosphorus is 2...

Embodiment 2

[0068] Embodiment 2, resource recycling of phosphorus in livestock and poultry breeding waste

[0069] like figure 1 As shown, follow the steps below to recycle the phosphorus in the farming waste:

[0070] (1) Control the solid content rate of livestock and poultry breeding waste with a phosphorus content of 100mg / g at 50%, introduce ultrasonic pre-oxidation tank 1, and perform pulsed ultrasonic action for 10min under the conditions of power 30W, temperature 30°C, and frequency 50MHz (operating 2min, stop 1min);

[0071] (2) Then add the waste according to the volume of the waste: the volume of the wet chemical oxidizer 2:3, introduce the waste treated in step (1) into the wet chemical oxidizer 2, and sequence the batch at a temperature of 150°C After reacting for 180 minutes, using oxygen as the oxidant, the partial pressure is 10MPa, the amount of phosphorus released after the reaction reaches 97mg / g, the phosphorus release rate reaches 97%, the amount of inorganic phosph...

Embodiment 3

[0076] Embodiment 3, resource recycling of phosphorus in livestock and poultry breeding waste

[0077] like figure 1 As shown, follow the steps below to recycle the phosphorus in the farming waste:

[0078] (1) Control the solid content rate of 200mg / g livestock and poultry breeding waste with a phosphorus content of 70%, introduce ultrasonic pre-oxidation tank 1, and perform pulsed ultrasonic action for 60min under the conditions of power 150W, temperature 20°C, and frequency 10MHz (operating 2min, stop 2min).

[0079] (2) According to the volume of the waste: the volume of the wet chemical oxidizer is 1:3, the waste treated in step (1) is introduced into the wet chemical oxidizer 2, and the sequence batch reaction is carried out at a temperature of 200°C for 120 minutes , with 30wt% hydrogen peroxide as oxidant, hydrogen peroxide: waste volume ratio is 1:10, phosphorus release after reaction reaches 196mg / g, phosphorus release rate reaches 98%, inorganic phosphorus is 196m...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00
Inventor 张涛方慈江荣风汪其明赵煦阳
Owner CHINA AGRI UNIV
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