Method for immobilizing nutrients in cow dung water by alum

A technology of cow dung and alum, which is applied in the field of resource utilization of agricultural waste, can solve the problems of biogas having no economic value, high equipment maintenance cost, and high use cost, and achieve good ecological and environmental benefits, convenient operation, and improved utilization rate Effect

Pending Publication Date: 2020-03-24
ACADEMY OF PLANNING & DESIGNING OF THE MINIST OF AGRI
View PDF1 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the treatment of cow dung water mainly includes anaerobic fermentation storage and returning to the field and direct storage and returning of dung water to the field. Among them, anaerobic fermentation takes the advantage of the biogas produced by it as a clean energy source and has become the most vigorously promoted use of dung water in my country. However, in the production of anaerobic fermentation of manure, the maintenance cost of equipment is relatively high, and the biogas produced by small-scale farms does not have the economic value of utilization, resulting in a lot of biogas being directly discharged into the atmosphere, causing environmental pollution; In terms of direct storage and returning of manure to the field, because manure contains a large am

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
  • Method for immobilizing nutrients in cow dung water by alum
  • Method for immobilizing nutrients in cow dung water by alum

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1

[0027] 1m 3 The cow dung water was passed into the adjustment tank, a total of 20 kg of alum was added, and stirring was continued to adjust the pH of the manure water to 6.0. After the pH was adjusted, the manure water added with alum was passed into the storage tank for storage. The manure water for cattle breeding comes from the manure water of the dairy farm that uses water to flush the manure (first dry the manure to the manure channel, and then flush to the solid-liquid separation device), after solid-liquid separation, the initial pH of the manure water without adding alum Is 8.25, ammonium nitrogen is 1681.68mg / L, ammonia emission flux is 37.40mg / m 2 / h, the solid content rate is 3.08%, and the number of fecal coliforms is 9.2×10 6 MPN / L. The ammonia emission flux after adding alum to cow manure water is 7.68g / m 2 / h, the ammonium nitrogen concentration is 1416.54mg / L, and the test storage time is 30 days.

[0028] After storing the manure water with alu...

Example Embodiment

[0029] Example 2

[0030] 1m 3 The cow dung water was passed into the adjustment tank, a total of 12 kg of alum was added, and the stirring was continued to adjust the pH of the manure water to 6.5. After the pH was adjusted, the manure water added with alum was passed into the storage tank for storage. Cow manure water comes from dairy farm manure water using the process of flushing manure with water (first dry the manure to the manure channel, and then flush to the solid-liquid separation device). After solid-liquid separation, the initial pH of the manure water without alum is 8.25 , Ammonium nitrogen is 1681.68mg / L, ammonia emission flux is 37.40mg / m 2 / h, the solid content rate is 3.08%, and the number of fecal coliform bacteria is 9.2×10 6 MPN / L. The ammonia emission flux after adding alum to cow manure water is 5.45g / m 2 / h, the ammonium nitrogen concentration is 1848.84mg / L, and the test storage time is 30 days.

[0031] After storing the manure water with alum added in th...

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 immobilizing nutrients in cow dung water with alum, which comprises the following steps: slowly adding the alum into the cow dung water in an adjusting tank, continuously stirring, and adjusting the pH value of the cow dung water to 5.5-6.5; wherein the addition amount of the alum is 1.2-3.5% of the mass fraction of the cow dung water. According to the invention, the alum is used as an additive, ammonia gas emission of the cow dung water can be effectively reduced, the nutrient immobilization effect is stable, the nutrient immobilization process flow of thecow dung water is simplified, ammonia gas emission and nitrogen leaching loss in the cow dung water are reduced, and the method has good ecological and environmental benefits.

Description

technical field [0001] The invention relates to the technical field of resource utilization of agricultural waste, in particular to a method for alum to hold cow dung water nutrients. Background technique [0002] With the rapid development of large-scale farming in my country, the discharge of manure and water from livestock and poultry farming has increased sharply. Pig farms generally clean up livestock and poultry manure by dry manure, which produces relatively little water, but cattle farms especially The amount of manure produced by dairy farms is relatively large. Due to its high solid content and difficult treatment, the manure produced by cattle farms has become one of the important sources of agricultural non-point source pollution, greenhouse gas and ammonia emissions. [0003] At present, the treatment of cow dung water mainly includes anaerobic fermentation storage and returning to the field and direct storage and returning of dung water to the field. Among them,...

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): C05G3/40C05G5/20
CPCC05D1/00C05G3/00
Inventor 孟海波赵立欣沈玉君丁京涛王健
Owner ACADEMY OF PLANNING & DESIGNING OF THE MINIST OF AGRI
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