Treatment method of biogas liquid

A treatment method and biogas slurry technology, which is applied in the field of livestock and poultry breeding biogas slurry treatment, can solve the problems of large-scale livestock and poultry farms without environmental impact assessment, ammonia nitrogen utilization, and biogas slurry not comprehensively utilized.

Inactive Publication Date: 2017-07-18
NANCHANG HANGKONG UNIVERSITY
View PDF7 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the farms are located in remote mountainous areas with a small number of farmers. In addition, the concentration of fertilizer substances in the biogas slurry is thin and the transportation is difficult. As a result, a large amount of biogas slurry is not comprehensively utilized, and it is discharged to the waters near the farm without treatment, which has a negative impact on the local water body. cause serious pollution
According to the survey data disclosed by the Ministry of Environmental Protection, 90% of the large-scale livestock and poultry farms have not carried out environmental impact assessment, and 60% of the farms lack the necessary biogas sl

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
  • Treatment method of biogas liquid
  • Treatment method of biogas liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A lye dosing pump and agitator are installed in the biogas slurry storage tank of a dairy farm. The pollutant concentration in the biogas slurry is: TP 10mg / L, ammonia nitrogen 300mg / L, COD 900mg / L, pH 6-8. Use 0.2mol / L sodium hydroxide solution to adjust the pH value of the biogas slurry to 10, and use a biogas slurry circulation pump to make the biogas slurry flow through the hollow fiber membrane module (membrane area 3m2) at a speed of 6cm / s 2 ) shell side flow; use 0.1mol / L sulfuric acid solution to flow in the tube side of the hollow fiber membrane module at a speed of 7cm / s, and the biogas slurry and sulfuric acid solution circulate for 2 hours at the same time, and the biogas slurry passes through the hollow fiber membrane module through the circulation pump. Shell side, and then return to the biogas slurry storage tank, but when the ammonia nitrogen concentration in the biogas slurry drops to 50mg / L, the contact absorption cycle is stopped, the wastewater treatm...

Embodiment 2

[0052] A lye dosing pump and agitator are installed in the biogas slurry storage tank of a pig farm. The concentration of pollutants in the biogas slurry is: TP35mg / L, ammonia nitrogen 700mg / L, COD 550mg / L, pH 6-8. Use 0.3mol / L sodium hydroxide solution to adjust the pH value of the biogas slurry to 11, and use a biogas slurry circulation pump to make the biogas slurry flow through the hollow fiber membrane module (membrane area 3m2) at a speed of 5.5cm / s 2 ) shell-side flow; use 0.2mol / L sulfuric acid solution to flow in the tube-side of the hollow fiber membrane module at a speed of 6.5cm / s, and circulate for 5 hours.

[0053] Use a 50L / H lift pump to transport the biogas slurry after contact absorption treatment to the membrane bioreactor, first to the anaerobic zone (9, specification Φ0.7×0.25m), and then to the facultative zone (10, Specification Φ0.7×0.25m), and finally flow to the aerobic zone (11, specification Φ0.7×0.8m). The suction capacity of the inner membrane of...

Embodiment 3

[0055] A lye dosing pump and agitator are installed in the biogas slurry storage tank of a pig farm. The pollutant concentration in the biogas slurry is: TP 70mg / L, ammonia nitrogen 1000mg / L, COD 1500mg / L pH 6-8. Use 0.3mol / L sodium hydroxide solution to adjust the pH value of the biogas slurry to 11, and use a biogas slurry circulation pump to make the biogas slurry flow through the hollow fiber membrane module (membrane area 3m2) at a speed of 8cm / s 2 ) shell-side flow; use 0.3mol / L sulfuric acid solution to flow in the tube-side of the hollow fiber membrane module at a speed of 10cm / s, and circulate for 10 hours.

[0056] Use a 50L / H lift pump to transport the biogas slurry after contact absorption treatment to the membrane bioreactor, first to the anaerobic zone (9, specification Φ0.7×0.25m), and then to the facultative zone (10, Specification Φ0.7×0.25m), and finally flows to the MBR area (11, specification Φ0.7×0.8). The suction capacity of the inner membrane of the mem...

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 treatment method of biogas liquid. According to the treatment method, after the pH (potential of Hydrogen) value of original biogas liquid is adjusted, ammonia nitrogen in the biogas liquid is subjected to preliminary recovery by adopting acidic absorption liquid through a way of absorption by a hollow fibrous membrane component; afterwards, the biogas liquid obtained by contact absorption is subjected to an anaerobic reaction, a facultative reaction and an aerobic reaction in sequence. By using the method provided by the invention, the ammonia nitrogen in the biogas liquid can be converted into an ammonium salt to carry out recycling; the concentration of the ammonia nitrogen in the biogas liquid is decreased; the subsequent biological denitrification and dephosphorization are facilitated. The treatment method is simple in process and low in cost. In the method provided by the invention, the concentration of the ammonia nitrogen in the biogas liquid subjected to the contact absorption is decreased to 20mg/L to 50mg/L; in the biogas liquid subjected to whole-course treatment, the TP (Total Phosphorus) index is 6mg/L to 8mg/L, the concentration of the ammonia nitrogen is 10mg/L to 30mg/L, the COD (Chemical Oxygen Demand) is 50mg/L to 220mg/L, and the pH value is 7 to 9; the national Discharge Standard of Pollutants for Livestock and Poultry Industry (GB18596-2001) is met.

Description

technical field [0001] The invention relates to the technical field of biogas slurry treatment for livestock and poultry breeding, in particular to a treatment method for biogas slurry. Background technique [0002] Livestock and poultry farms mostly adopt the ecological model of raising-biogas-irrigation: the wastewater generated by breeding is treated by anaerobic fermentation to produce biogas slurry containing a large amount of ammonia nitrogen, phosphorus and organic matter, and the obtained biogas slurry is used in the farmland near the farm fertilization. [0003] In recent years, with the continuous expansion of the breeding scale, the amount of biogas slurry produced is increasing. However, most of the farms are located in remote mountainous areas with a small number of farmers. In addition, the concentration of fertilizer substances in the biogas slurry is thin and the transportation is difficult. As a result, a large amount of biogas slurry is not comprehensively...

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): C02F9/14C01C1/28C02F103/20
Inventor 董永全陈乐平郭桦冰周全
Owner NANCHANG HANGKONG UNIVERSITY
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