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

Method for strengthening autotrophic denitrification effect of urban sewage by using oxidation ditch

A technology for urban sewage and autotrophic denitrification, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. It can reduce the emission, avoid the inhibition, and improve the effect

Active Publication Date: 2014-02-26
SHANDONG ZIER ENVIRONMENTAL TECH CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the sludge age in the oxidation ditch system is long, the amount of residual sludge discharge is small, which will affect the biological phosphorus removal effect of the system
Especially when the carbon and nitrogen ratio of urban sewage is low, denitrification denitrification and anaerobic phosphorus release compete for carbon sources, making it difficult to guarantee the effect of nitrogen and phosphorus removal in the oxidation ditch system

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 strengthening autotrophic denitrification effect of urban sewage by using oxidation ditch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The present invention will be further described below in conjunction with the drawings and embodiments: figure 1 The device shown for enhancing the autotrophic denitrification of urban sewage oxidation ditch process is equipped with high-load activated sludge reactor 1, intermediate sedimentation tank 2, oxidation ditch reactor 3 and secondary sedimentation tank 4; high-load activated sludge reactor 1 is equipped with There are anaerobic zone 1.1 and aerobic zone 1.2, aerobic zone 1.2 is connected with intermediate sedimentation tank 2, meanwhile, intermediate sedimentation tank 2 and anaerobic zone 1.1 are connected by sludge return pump 1.3; intermediate sedimentation tank 2 is connected with oxidation ditch reactor 3-phase connection; oxidation ditch reactor 3 is equipped with submerged propeller 3.1, overflow weir 3.2, oxidation ditch secondary sedimentation tank connecting pipe 3.3, air compressor 3.5, gas flow meter 3.6, aeration pipe 3.7; oxidation ditch secondary ...

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 relates to a method for strengthening the autotrophic denitrification effect of urban sewage by adopting an oxidation ditch and belongs to the field of sewage treatment. The method comprises the following steps of: feeding the urban sewage into an aerobic zone of a high-load activated-sludge reactor so as to be subjected to anaerobic phosphorus release, feeding the urban sewage into an aerobic zone, adsorbing organic matters in the urban sewage onto activated sludge under the adsorbing action of the activated sludge, removing the phosphorus in the urban sewage by the way of aerobic phosphorus adsorbing, feeding the urban sewage in which the organic matters and the phosphorus are removed into the oxidation ditch, carrying out short-time nitrification and anaerobic ammonium oxidation to the urban sewage in a hypoxic zone, carrying out anaerobic ammonium oxidation to the urban sewage in an anoxic zone, and carrying out autotrophic nitrogen removal to the urban sewage by carrying out short-time nitrification and short-time anaerobic ammonium oxidation in the hypoxic zone and the anoxic zone repeatedly. By utilizing the method, the organic matters in the sewage can be enriched into the sludge in the process of removing the phosphorus biologically, the sludge can be used for the anaerobic methanogenesis, and the energy in the sludge can be recovered. In addition, the autotrophic nitrogen removal is realized by carrying out nitrification and anaerobic ammonium oxidation in the hypoxic zone and the anoxic zone repeatedly, and the energy consumed for treating the sewage can be reduced greatly.

Description

Technical field [0001] The invention relates to a method for strengthening the autotrophic denitrification of urban sewage oxidation ditch technology, and belongs to the technical field of sewage biological treatment. Background technique [0002] The oxidation ditch process sludge has a long residence time, which is beneficial to the growth of nitrifying bacteria. Therefore, the nitrification effect of the oxidation ditch process can generally be guaranteed. When the sludge age of the oxidation ditch system is long, the remaining sludge discharge is small, which will affect the biological phosphorus removal effect of the system. Especially when the carbon and nitrogen of urban sewage is relatively low, denitrification and anaerobic phosphorus release compete for carbon sources, which makes it difficult to guarantee the nitrogen and phosphorus removal effect of the oxidation ditch system. [0003] After the discovery of anaerobic bacteria, the autotrophic denitrification of sewage...

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 Patents(China)
IPC IPC(8): C02F9/14
Inventor 彭永臻汪传新马斌
Owner SHANDONG ZIER ENVIRONMENTAL TECH CO LTD
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