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

Device and method for partial nitrosation of low carbon municipal sewage

A technology of urban sewage and nitrosation, applied in a new type of sewage biological denitrification technology, can solve the problem of insufficient carbon source for denitrification, achieve remarkable sustainability and economic benefits, short process flow, and reduce the cost of reclaimed water Effect

Inactive Publication Date: 2012-11-21
BEIJING UNIV OF TECH
View PDF0 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to realize partial nitrosation of low-carbon urban sewage, provide suitable water inflow for the ANAMMOX process, solve the problem of insufficient carbon source for denitrification in existing urban sewage plants, and make the nitrogen in the effluent meet the first-class A standard, which is an urban sewage Nitrogen removal provides a new way of thinking

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
  • Device and method for partial nitrosation of low carbon municipal sewage
  • Device and method for partial nitrosation of low carbon municipal sewage
  • Device and method for partial nitrosation of low carbon municipal sewage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: referring to accompanying drawing, connect reactor and carry out commissioning operation by step 1, by attached figure 2 It is concluded that during the initial operation, the ammonia oxidation rate is 35.8%, the effluent nitrous is only 10mg / L, while the effluent nitrate is as high as 85mg / L, and the nitrosation rate is only 12%. After appropriately extending the aeration time, the ammonia oxidation rate in the fourth cycle increased to 52.6%. Although the effluent nitrate nitrogen further increased to 113.6mg / L, the effluent nitrous increased to 33.9mg / L, and the nitrosation rate was 24.1%. In the next few cycles, the accumulation rate of nitrous nitrogen increased steadily. In the eighth cycle, the ammonia oxidation rate and nitritation rate both exceeded 50%, the nitrate nitrogen in the effluent was reduced to 66mg / L, and the short-range nitrification was initially successfully started. From the 0th to the 30th cycle, the nitrosation rate was in a con...

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 device and a method for partial nitrosation of low carbon municipal sewage, belonging to the field of sewage treatment. The device is provided with a raw water tank, a plug flow partial nitrosation reactor and a vertical flow secondary sedimentation tank, wherein the plug flow partial nitrosation reactor is divided into four chambers, the first chamber, the second chamber and the fourth chamber are aerobic zones, and the third chamber is an anoxic zone. The method utilizing the device comprises the following steps: 1) putting nitrified sludge collected from a sewage plant into the partial nitrosation reactor; 2) domesticating the nitrified sludge with sludge digestion fluid by using the mode of SBR; 3) further domesticating the nitrified sludge with low carbon municipal sewage by using the SBR mode; and 4) shifting the mode to a continuous flow mode so as to realize partial nitrosation of the low carbon municipal sewage. The invention provides the method for partial nitrosation of low carbon municipal sewage at a normal temperature, and the method is simple to control and has high stability.

Description

technical field [0001] The invention relates to a new type of sewage biological denitrification technology, that is, the secondary effluent of the A / O (anaerobic / aerobic) phosphorus removal process is used as the raw water, and through the partial nitrosation process, about half of the ammonia nitrogen in the sewage is controlled to be oxidized to sub Nitrogen, and reduce the production of nitrate nitrogen as much as possible, provide suitable influent for the anaerobic ammonium oxidation (ANAMMOX) process of low-carbon urban sewage to achieve autotrophic denitrification, suitable for the treatment and reuse of low-carbon urban sewage. Background technique [0002] Low C / N is a typical water quality characteristic of urban domestic sewage in my country. However, when most sewage plants rely on traditional nitrification and denitrification to denitrify, they face the problem of insufficient carbon sources and the competition for carbon sources between denitrification and phos...

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): C02F3/30
Inventor 李冬张昭曾辉平张杰
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