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

SBR nitrosation starting method suitable for municipal household sewage

A technology of urban domestic sewage and nitrosation, applied in the field of urban domestic sewage SBR nitrosation start-up, can solve problems such as unstable operation, and achieve the effect of saving operating costs

Inactive Publication Date: 2013-05-15
BEIJING UNIV OF TECH
View PDF2 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When dealing with domestic sewage with low ammonia nitrogen concentration, this start-up method not only needs to artificially add a large amount of ammonia-containing reagents, but also may cause unstable operation when it is converted to treat low ammonia nitrogen sewage

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
  • SBR nitrosation starting method suitable for municipal household sewage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The test is based on the domestic sewage of a community, and the specific water quality is as follows: COD=300-400mg / L, BOD 5 =120-150mg / L, SS=76-114mg / L, TP=5.75-6.30mg / L, NH 4 + -N=75-90mg / L, NO 2 - -N≤0.25mg / L, NO 3 - -N≤1.5mg / L, TP≤1mg / L, pH=7.0-7.8, alkalinity is 550.59-610.78mg / L (as CaCO 3 count).

[0022] The specific treatment is as follows:

[0023] In the initial sludge acclimatization, first control the DO concentration at 0.8-1.0mg / L and run for 10 days (20 cycles), so that both AOB and NOB can rapidly proliferate. From the 11th day, start to limit oxygen and control the DO concentration to 0.3 -0.5mg / L, and the ammonia oxidation rate is controlled at about 50%, and the dual control of low DO and ammonia oxidation rate is used to enrich AOB and eliminate NOB. figure 1 It is the change trend diagram of nitrogen concentration, ammonia oxidation rate and nitrosation rate in the start-up stage.

[0024] Depend on figure 1 It can be seen that in the fi...

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

An SBR nitrosation starting method suitable for municipal household sewage belongs to the field of treatment and resource of municipal sewage. Complete nitrification sludge is inoculated under normal temperature conditions, and municipal household sewage is the research object. In an initial sludge acclimatization, first the concentration of DO is controlled at 0.8-1.0 mg / L for running of 10d (20 cycles), so that AOB and NOB can be rapidly proliferated; from the 11th day, oxygen is limited, and concentration of DO is controlled to 0.3-0.5mg / L, and ammonia oxidation rate is controlled at around 50%. After 44 days, nitrosation rate reaches higher than 90%, and COD removal rate reaches higher than 80%, so as to successfully realize SBR nitrification start-up of household sewage at normal temperature.

Description

technical field [0001] The invention belongs to the field of urban sewage treatment and recycling. Specifically, it relates to a method specially used for starting SBR nitrosation of urban domestic sewage under normal temperature conditions. Background technique [0002] The removal of nitrogen in wastewater mainly includes physical methods, chemical methods and biological denitrification methods. Compared with physical and chemical denitrification technology, biological denitrification technology has the advantages of simple process, low cost, easy promotion, and is not easy to cause secondary pollution. , therefore, more and more people of all ages. The traditional biological denitrification process converts organic nitrogen in water into ammonia nitrogen through ammonification, then converts ammonia nitrogen into nitrate nitrogen through nitrification, and then reduces nitrate nitrogen into nitrogen gas from the water through denitrification. However, the traditional ni...

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): C02F3/12
CPCY02W10/10
Inventor 李冬苏东霞张功良张肖静梁瑜海周元正张玉龙吴青苏庆岭张翠丹门绚杨胤何永平范丹罗亚红曾辉平张杰
Owner BEIJING UNIV OF TECH
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