Regulation and control method for efficiently recovering phosphorus in livestock and poultry feces

A technology for livestock and poultry manure and phosphorus, which is applied in the field of agricultural resources and environment, can solve the problems of low recovery efficiency of phosphorus from livestock and poultry manure, limited conversion capacity, difficulty in dynamic control of struvite crystallization and granulation process, etc., and achieves high-efficiency crystallization. The effect of pelletizing and improving recycling efficiency

Active Publication Date: 2014-04-30
CHINA AGRI UNIV
View PDF9 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a control method for the recovery of phosphorus in livestock and poultry manure. The present invention utilizes the principle of microwave chemistry to realize microwave-induced oxidation control and microwave crystallization pro...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1, efficient recovery of phosphorus in livestock and poultry manure

[0043] Using 30wt%H 2 o 2 Solution preparation H 2 o 2 Content is the oxidant solution of 0.5mol / L, adopts bittern to prepare magnesium ion content and is the magnesium agent solution of 5mol / L, adopts caustic soda to prepare the pH value regulating agent that hydroxide ion content is 2mol / L, then follow the steps Regulation and recovery of phosphorus in livestock and poultry manure.

[0044] (1) After regulating the mass moisture content of livestock and poultry manure (phosphorus content is 200mg / L, of which organic phosphorus content is 80mg / L), it is introduced into the microwave-induced oxidation control reaction tank, and the blower is used to press oxygen and livestock and poultry The volume ratio of the manure is 0.5:1 and oxygen is blown in, and the oxidant solution is sprayed into the oxidant solution according to the volume ratio of the oxidant solution to the livestock manur...

Embodiment 2

[0048] Embodiment 2, efficient recovery of phosphorus in livestock and poultry manure

[0049] Using 30wt%H 2 o 2 Solution preparation H 2 o 2 Content is the oxidizing agent solution of 2mol / L, adopts bittern to prepare the magnesium solution that magnesium ion content is 3mol / L, adopts caustic soda to prepare the pH value regulating agent that hydroxide ion content is 1mol / L, then regulate and control according to the following steps Recovery of phosphorus in livestock and poultry manure.

[0050] (1) After adjusting the mass moisture content of livestock and poultry manure (phosphorus content is 300mg / L, of which organic phosphorus content is 100mg / L), it is introduced into the microwave-induced oxidation control reaction tank, and the blower is used to press oxygen and livestock and poultry The volume ratio of the manure is 2:1, and oxygen is blown in. The oxidant solution is sprayed into the oxidant solution according to the volume ratio of the oxidant solution to the ...

Embodiment 3

[0054] Embodiment 3, efficient recovery of phosphorus in livestock and poultry manure

[0055] Using 30wt%H 2 o 2 Solution preparation H 2 o 2 Content is the oxidizing agent solution of 1.5mol / L, adopts bittern to prepare the magnesium agent solution that magnesium ion content is 1mol / L, adopts caustic soda to prepare the pH value regulating agent that the hydroxide radical content is 3mol / L, then regulate and control according to the following steps Recovery of phosphorus in livestock and poultry manure.

[0056] (1) After regulating the mass moisture content of livestock and poultry manure (phosphorus content is 100mg / L, of which organic phosphorus content is 50mg / L), it is introduced into the microwave-induced oxidation control reaction tank, and the blower is used to press oxygen and livestock and poultry The volume ratio of the manure is 1:1 and oxygen is blown in. The oxidant solution is sprayed into the oxidant solution according to the volume ratio of the oxidant s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Average particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a regulation and control method for efficiently recovering phosphorus in livestock and poultry feces. The regulation and control method comprises the steps of introducing the livestock and poultry feces into a microwave induced oxidation control reactive tank, adding an oxidant solution and oxygen, and performing pulsed microwave irradiation by using a microwave regulation and control device; introducing supernatant fluid of the treated livestock and poultry feces into a microwave crystallization process control reactive tank, adding a magnesia mixture solution and a pH value regulating agent, performing mechanical stirring on the mixed solution, and performing pulsed microwave irradiation by using the microwave regulation and control device; introducing the supernatant fluid after reaction into a sedimentation tank, and overflowing water by adopting a decanter; and performing intermittent sludge discharge control on struvite crystal mud, and recovering the crystal mud by adopting a bag filter. The method disclosed by the invention can improve the recovery efficiency of phosphorus in the livestock and poultry feces, and the phosphorus recovery rate is more than 99%; the method disclosed by the invention can be used for efficiently converting organic phosphorus in the livestock and poultry feces into inorganic phosphorus, the conversion rate of the organic phosphorus is more than 99%, and the conversion time is less than 60 minutes; the method disclosed by the invention can be used for regulating and controlling the width and position of a metastable region of struvite crystals to realize efficient crystallization and granulation of struvite.

Description

technical field [0001] The invention relates to a control method for phosphorus recovery in livestock and poultry manure, and belongs to the technical field of agricultural resources and environment. Background technique [0002] Phosphorus is an essential element in the life process, however, phosphorus is facing the contradiction of scarcity of resources in the world. At the same time, a large amount of phosphorus is lost from the environment, which not only leads to eutrophic pollution of water bodies, but also makes phosphorus non-renewable. In recent years, the problem of livestock and poultry manure pollution has become increasingly prominent, especially the excessive discharge of phosphorus in livestock and poultry manure, which urgently needs reasonable treatment and utilization. Therefore, it is of great research value to recycle phosphorus resources in livestock and poultry manure, and to combine artificial recycling of phosphorus nutrients with environmental poll...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C02F11/00C02F11/06C01B25/45
Inventor 张涛江荣风方慈李平
Owner CHINA AGRI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap