Method for retaining ammonia nitrogen by using polylysine in biological sewage treatment process

A sewage biological treatment, polylysine technology, applied in the direction of biological water/sewage treatment, water/sludge/sewage treatment, animal husbandry wastewater treatment, etc., can solve the case of sewage treatment without natural ammonia oxidation inhibitors etc. to achieve the effects of easy operation, simple process, good stability and high efficiency

Active Publication Date: 2022-07-29
BEIJING UNIV OF TECH
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, natural ammonia oxidation inhibitors have not been fully developed at present, and there are no examples of applying natural ammonia oxidation inhibitors to the treatment of returning wastewater

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 retaining ammonia nitrogen by using polylysine in biological sewage treatment process
  • Method for retaining ammonia nitrogen by using polylysine in biological sewage treatment process
  • Method for retaining ammonia nitrogen by using polylysine in biological sewage treatment process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The seed sludge of the embodiment of the present invention is the flocculent sludge with nitrification activity in an urban sewage treatment plant in Beijing, and the influent water quality index is NH 4+ -N≈56mg / L, NO 2 - -N≈0mg / L, NO 3 - -N≈0mg / L.

[0035] The activated sludge was placed in a 1L reactor, and the sludge concentration was about 3000mg / L. The activated sludge was cleaned three times to eliminate the interference of some impurities in the reactor. Then, only one polylysine soaking treatment was performed on the activated sludge, and the prepared polylysine stock solution was added to the reactor to maintain the concentration at about 400 mg / L, and the soaking treatment was carried out for 6 hours. During this period, use The stirring device stirs to ensure that the activated sludge and the drug are fully mixed and contacted. After soaking, the activated sludge was washed three times to remove residual polylysine, and then the reactor was operated in...

Embodiment 2

[0038] The seed sludge of the embodiment of the present invention is the biofilm sludge with nitrification activity in a city sewage treatment plant in Beijing, and the influent water quality index is NH 4 + -N≈75mg / L, NO 2 - -N≈28mg / L, NO 3 - -N≈0mg / L, COD≈100mg / L.

[0039] The packing with biofilm was placed in a 1L reactor, and the amount of biofilm was about 5000 mg / L. The activated sludge was cleaned three times to eliminate the interference of some impurities in the reactor. Then, only one poly-lysine immersion treatment was performed on the biofilm sludge, and the prepared poly-lysine stock solution was added to the reactor to maintain its concentration at about 500 mg / L, and the immersion treatment was carried out for 10 hours. During this period Use a stirring device to stir to ensure that the biofilm sludge and the drug are fully mixed and contacted. After soaking, the biofilm sludge was cleaned three times to remove residual polylysine, and then the reactor w...

Embodiment 3

[0042] The seed sludge of the embodiment of the present invention is activated sludge with nitrification activity in a certain MBR process, and the influent water quality index is NH 4 + -N≈150mg / L, NO 2 - -N≈0mg / L, NO 3 - -N≈0mg / L.

[0043] The activated sludge was placed in a 1L reactor, and the sludge concentration was about 10,000 mg / L. The activated sludge was cleaned three times to eliminate the interference of some impurities in the reactor. Then, only one polylysine soaking treatment was performed on the activated sludge, and the prepared polylysine stock solution was added to the reactor to maintain the concentration at about 500 mg / L, and the soaking treatment was carried out for 30 hours. During this period, use The stirring device stirs to ensure that the activated sludge and the drug are fully mixed and contacted. After soaking, the activated sludge was washed three times to remove residual polylysine, and then the reactor was operated in the mode of water ...

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
concentrationaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for retaining ammonia nitrogen by using polylysine in a biological sewage treatment process, and belongs to the field of sewage treatment and recycling. The method comprises the following steps that sludge with nitrification activity is subjected to soaking treatment with polylysine, the concentration of the adopted polylysine is 300-1000 mg/L, and the soaking time is 6-30 h. After the sludge is soaked once, the ammoxidation inhibition effect can last for 6 operation cycles. The method is suitable for various sludge types including biological membranes and granular sludge, is effective in a wide range of pH, temperature, dissolved oxygen, sludge concentration and sludge ammoxidation activity, and has good stability and high efficiency. According to the method, ammonia nitrogen in the sewage can be effectively retained, nitrite, nitrate and COD (Chemical Oxygen Demand) can be normally removed, the method is used for a sewage treatment process with returning to the field as a target, and recycling, harmlessness and stabilization of sewage treatment are realized.

Description

technical field [0001] The invention relates to the field of sewage treatment and resource utilization, in particular, to a method for utilizing polylysine to retain ammonia nitrogen in the biological sewage treatment process. Background technique [0002] With the continuous advancement of my country's ecological and environmental protection work, the concept of environmental friendliness is deeply rooted in the hearts of the people. It is of great significance to propose measures to reduce and recycle sewage in the protection of the ecological environment. For example, returning the sewage from livestock and poultry breeding to the fields after proper treatment is a typical way of recycling sewage. soil nutrients. However, the sewage from the livestock and poultry breeding industry also contains extremely high COD and antibiotics, which will not only cause the phenomenon of "burning seedlings" but also affect the soil microbial flora and further cause the spread of resist...

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 Applications(China)
IPC IPC(8): C02F3/12C02F103/20
CPCC02F3/1205C02F3/12C02F2103/20Y02W10/10
Inventor 高景峰赵轶凡武泽杰王知其崔影超张艺
Owner BEIJING UNIV OF TECH
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