Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A method for high-efficiency phosphorus recovery coupled with anaerobic fermentation to treat livestock and poultry manure

An anaerobic fermentation, livestock and poultry manure technology, applied in the field of breeding waste treatment, can solve the problems of low efficiency, low orthophosphate recovery efficiency, low methane conversion efficiency, etc., achieve high efficiency, promote extraction and recovery, recovery Efficient effect

Active Publication Date: 2019-06-07
BIOGAS SCI RES INST MIN OF AGRI
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the anaerobic fermentation process can also extract a large amount of nutrient salts from livestock and poultry manure into the biogas slurry. A large amount of phosphorus in the biogas slurry can still be recovered by treating the biogas slurry, but the phosphorus is converted into soluble positive substances that are easy to recover. Phosphate is less efficient and most of the phosphorus is in the form of insoluble orthophosphate
[0004] Regarding the anaerobic fermentation of livestock and poultry manure and the recovery and treatment of phosphorus, at present, only the research on a single process is carried out, either to recover phosphorus from livestock and poultry manure, or to produce methane through anaerobic fermentation of livestock and poultry manure, and then Phosphorus in the biogas slurry is recovered, but the recovery efficiency of orthophosphate is not high, the conversion efficiency of methane is not high, and the gas production needs to be further improved in the treatment method of a single process

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for high-efficiency phosphorus recovery coupled with anaerobic fermentation to treat livestock and poultry manure
  • A method for high-efficiency phosphorus recovery coupled with anaerobic fermentation to treat livestock and poultry manure
  • A method for high-efficiency phosphorus recovery coupled with anaerobic fermentation to treat livestock and poultry manure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for efficiently treating cow dung, comprising the steps of:

[0028] (1) hydrothermal pretreatment: take by weighing 25g dry cow dung, phosphorus content is 0.55% in the dry cow dung, to wherein adding hydrochloric acid and water carry out hydrothermal pretreatment, the total mass concentration of hydrochloric acid in the hydrothermal pretreatment mixed system is 0.1%, the total solid content of dry cow dung is 5%, the mixed system is subjected to hydrothermal pretreatment at 200°C for 0.5h, and then solid-liquid separation is carried out, and solid phase product I and liquid phase product I are collected;

[0029] (2) Phosphorus recovery treatment: add NaOH to the liquid phase product I to adjust the pH to 10, stir at 150rpm for 20 minutes, then let it stand for 30 minutes, and then separate the solid phase product II and the liquid phase product II by centrifugation. , the solid phase product II was collected, and after detection, the solid phase product II w...

Embodiment 2

[0032] A method for efficiently processing pig manure, comprising the following steps:

[0033] (1) hydrothermal pretreatment: take by weighing 50g dry pig manure, phosphorus content is 0.65% in the dry pig manure, to wherein adding nitric acid and water carry out hydrothermal pretreatment, the total mass concentration of nitric acid in the hydrothermal pretreatment mixed system is 1%, the solid content of pig manure is 20%, when the mixture is heated until the temperature reaches 380°C, the hydrothermal pretreatment reaction is stopped, and then the solid-liquid separation is carried out, and the solid phase product I and the liquid phase product I are collected;

[0034] (2) Phosphorus recovery treatment: add Mg(OH) to the liquid phase product Ⅰ 2 and MgO to adjust the pH to 9, stir at 100rpm for 30min, then let it stand for 1min, and then centrifuge to separate solid-phase product II and liquid-phase product II, and collect the solid-phase product II. After testing, the sol...

Embodiment 3

[0037] A method for efficiently treating chicken manure, comprising the following steps:

[0038] (1) hydrothermal pretreatment: take by weighing 100g dry chicken manure, phosphorus content is 0.58% in the dry chicken manure, to wherein adding hydrochloric acid and water carry out hydrothermal pretreatment, the total mass concentration of hydrochloric acid in the hydrothermal pretreatment mixed system is 5%, the solid content of chicken manure is 40%, the mixed system is subjected to hydrothermal pretreatment at 100°C for 6 hours, and then solid-liquid separation is carried out, and solid phase product I and liquid phase product I are collected;

[0039] (2) Phosphorus recovery treatment: add Ca(OH) to the liquid phase product Ⅰ 2 or CaO to adjust the pH to 11, stir at 300rpm for 5 minutes, and then let it stand for 20 minutes, then filter and separate the solid and liquid to obtain the solid-phase product II and liquid-phase product II, and collect the solid-phase product II ...

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

No PUM Login to View More

Abstract

The invention provides a method for treating livestock and poultry feces with high-efficiency nutrient salt recovery coupled with anaerobic fermentation, and belongs to the technical field of breeding waste treatment. The method comprises the following steps: (1) performing hydrothermal pretreatment on livestock and poultry manure; (2) performing phosphorus recovery treatment on the pretreated livestock and poultry manure; Anaerobic fermentation of poultry manure. The treatment method provided by the present invention is based on hydrothermal pretreatment of livestock and poultry manure nutrient salt recovery and anaerobic fermentation coupled process, this process well promotes the extraction and recovery of phosphorus in livestock and poultry manure, and the treatment of livestock and poultry manure The improvement of anaerobic fermentation performance has realized the maximum resource conversion and utilization of livestock and poultry manure.

Description

technical field [0001] The invention belongs to the technical field of breeding waste treatment, and in particular relates to a method for high-efficiency phosphorus recovery coupled with anaerobic fermentation for treating livestock and poultry manure. Background technique [0002] The rapid development of large-scale breeding industry has brought a large amount of livestock and poultry manure. At present, the total amount of cow manure, pig manure and chicken manure in the world is as high as 1.79 billion tons per year. Anaerobic fermentation is an important way of disposal and utilization. Not only Biogas can be produced, and biogas residue can also be used as fertilizer. However, the existing method of anaerobic fermentation to treat livestock and poultry manure, on the one hand, the conversion rate of methane is not high, on the other hand, because the ratio of nitrogen and phosphorus in livestock and poultry manure is very high, a large amount of nitrogen and phosphoru...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/26C02F11/04C02F103/20
CPCC01B25/26C02F11/04C02F2103/20Y02E50/30
Inventor 代立春谭芙蓉王彦伟吴波祝其丽陈城汉何明雄
Owner BIOGAS SCI RES INST MIN OF AGRI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com