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

Biological treatment method of high-ammonia nitrogen pig raising biogas slurry

A high-ammonia-nitrogen pig biogas treatment technology, applied in the field of biological environmental protection, can solve the problems of difficult operation, high cost of high-ammonia nitrogen biogas slurry treatment, poor effect, etc., and achieve the effect of low cost, improved environment and simple operation

Inactive Publication Date: 2016-07-20
HUNAN UNIV
View PDF3 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a biological treatment method for high-ammonia-nitrogen pig biogas slurry to solve the common problems of high ammonia-nitrogen biogas slurry treatment cost, difficult operation, poor effect, and difficult to promote.

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
  • Biological treatment method of high-ammonia nitrogen pig raising biogas slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) After solid-liquid separation of 10L swine biogas slurry, the clear liquid was sterilized by adding 2ml of 10% sodium hypochlorite solution. The measured initial ammonia nitrogen concentration was 190.3mg / L, total phosphorus concentration was 6.3mg / L, and pH was 8.8. The ratio of nitrogen to phosphorus and pH are all within the appropriate range and can be used directly.

[0019] (2) Inoculate the microalgae in the logarithmic phase into the pretreated biogas slurry according to the inoculation amount of 10% of the volume ratio of the microalgae and the biogas slurry. At a temperature of 25°C, a light intensity of 5000lux, a light-to-dark ratio of 12:12h, and aeration and stirring for 10 days, the removal rate of ammonia nitrogen reached 99.6%, and the removal rate of total phosphorus reached 93.1%.

[0020] (3) After the treatment is completed, the biogas slurry containing the microalgal pulp is separated from solid to liquid by the flocculation sedimentation metho...

Embodiment 2

[0022] (1) After solid-liquid separation of 10L swine biogas slurry, the clear liquid was sterilized by adding 2ml of 10% sodium hypochlorite solution. The measured initial ammonia nitrogen concentration was 249.4mg / L, total phosphorus concentration was 8.5mg / L, and pH was 8.2. The ratio of nitrogen to phosphorus and pH are all within the appropriate range and can be used directly.

[0023] (2) Inoculate the microalgae in the logarithmic phase into the pretreated biogas slurry according to the inoculation amount of 10% of the volume ratio of the microalgae and the biogas slurry. At a temperature of 25°C, a light intensity of 5000lux, a light-to-dark ratio of 12:12h, and aeration and stirring for 10 days, the removal rate of ammonia nitrogen reached 95.9%, and the removal rate of total phosphorus reached 90.1%.

[0024] (3) After the treatment is completed, the biogas slurry containing the microalgae pulp is separated from solid to liquid by the flocculation sedimentation metho...

Embodiment 3

[0026] (1) After solid-liquid separation of 10L swine biogas slurry, the clear liquid was sterilized by adding 2ml of 10% sodium hypochlorite solution. The measured initial ammonia nitrogen concentration was 318.9mg / L, total phosphorus concentration was 10.8mg / L, and pH was 8.4. The ratio of nitrogen to phosphorus and pH are all within the appropriate range and can be used directly.

[0027] (2) Inoculate the microalgae in the logarithmic phase into the pretreated biogas slurry according to the inoculation amount of 10% of the volume ratio of the microalgae and the biogas slurry. At a temperature of 25°C, a light intensity of 5000lux, a light-to-dark ratio of 12:12h, and aeration and stirring for 10 days, the removal rate of ammonia nitrogen reached 89.7%, and the removal rate of total phosphorus reached 91.2%.

[0028] (3) After the treatment is completed, the solid-liquid separation of the biogas slurry containing the microalgae pulp is carried out by the flocculation sedime...

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
Dry weightaaaaaaaaaa
Dry weightaaaaaaaaaa
Dry weightaaaaaaaaaa
Login to View More

Abstract

The invention discloses a biological treatment method of high-ammonia nitrogen pig raising biogas slurry. The method comprises the following steps: (1) after solid-liquid separation of the pig raising biogas slurry, sequentially performing disinfection, nitrogen-phosphorus ratio adjustment and pH adjustment of a clear liquid to obtain pretreated biogas slurry; (2) inoculating the pretreated biogas slurry with microalgae in a logarithmic phase, wherein the volume ratio of the microalgae to biogas slurry is 5-15%, the treatment temperature is 20-26 DEG C, the illumination intensity is 4,000-6,000lux, and the light-dark ratio is (9-14):(14-9)h; and performing aeration or mechanical stirring for 7-14d; and (3) after the treatment, performing solid-liquid separation of the biogas slurry containing microalgae slurry, wherein the liquid is purified biogas slurry, and the solid is microalgae biomass. The method is simple to operate; the removal rates of ammonia nitrogen and total phosphorus both exceed 90%; the separated microalgae biomass can be used as a raw material of a feed or biodiesel; and secondary pollution is avoided.

Description

technical field [0001] The invention relates to a biological treatment method for high-ammonia-nitrogen pig-raising biogas liquid, in particular to a biological treatment method for pig-raising waste water based on microalgae cultivation, and belongs to the technical field of biological environmental protection. Background technique [0002] In recent years, as the national livestock and poultry breeding industry, especially the pig farming industry, has become more and more large-scale, it has also brought about increasingly serious environmental pollution problems while solving the problem of livestock and poultry product supply and driving rural economic development. According to the survey, in 2014, the national livestock and poultry breeding industry discharged 2.894 million tons of chemical oxygen demand, 287,000 tons of ammonia nitrogen, and 232,000 tons of total phosphorus. If not treated adequately, these nutrients will affect agricultural development and environmen...

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): C02F9/14C02F103/20
CPCC02F9/00C02F1/00C02F1/50C02F1/66C02F3/322C02F2103/20C02F2203/004C02F2303/04
Inventor 杨春平罗乐刘红玉文珊周自力娄伟严洲仇璐焦盼盼
Owner HUNAN UNIV
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