Method for deep denitrification and dephosphorization of sewage

A technology for deep denitrification and sewage, applied in chemical instruments and methods, biological water/sewage treatment, oxidized water/sewage treatment, etc. , The effect of reducing COD content

Inactive Publication Date: 2019-02-01
SHENZHEN MUNICIPAL DESIGN & RES INST +1
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the country's environmental protection requirements become more and more stringent, in order to eliminate black and odorous water bodies and control water eutrophication, the discharge standa

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 deep denitrification and dephosphorization of sewage

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0042] Example 1

[0043] The sewage is taken from the pilot plant of sewage treatment on Jinlian Road, Pingshan District, Shenzhen. The sewage flows into the anaerobic tank through the water inlet. After being treated in the anaerobic tank, the effluent flows into the mud water separation tank, and the supernatant liquid separated by the mud water separation tank is dephosphorized. After being treated in the phosphorus removal tank, it flows into the nitrification tank, after being treated in the nitrification tank, it flows into the anoxic tank, and the sludge separated by the mud-water separation tank flows into the anoxic tank. After that, the effluent flows into the secondary sedimentation tank, part of the sludge in the secondary sedimentation tank flows into the anaerobic tank, the remaining sludge is discharged from the sludge outlet, and the effluent from the secondary sedimentation tank flows into the ozone oxidation tank. After being treated by the ozone oxidation ta...

Example Embodiment

[0048] Example 2

[0049] The treatment method of Example 2 is basically the same as that of Example 1. The difference is that in Example 2, spherical suspension filler is used as the filler in the nitrification tank, while in Example 1, the braided fiber filler is used as the filler in the nitrification tank.

[0050] The monitoring data are as follows: the concentration of COD in the influent is 206-500mg / L, the concentration of TN in the influent is 30.0-38.0mg / L, the concentration of TP in the influent is 3.1-4.3mg / L, and the average concentration of COD in the effluent is 5.0mg / L, the average concentration of TN in the effluent is 1.5mg / L, and the average concentration of TP in the effluent is lower than 0.1mg / L, which is better than the surface water class IV standard.

Example Embodiment

[0051] Example 3

[0052] The treatment method of Example 3 is basically the same as that of Example 1. The difference is that in Example 3, no filler is used in the nitrification tank, while in Example 1, braided fiber filler is used as the filler in the nitrification tank.

[0053] The monitoring data are as follows: the concentration of COD in the influent is 206-500mg / L, the concentration of TN in the influent is 30.0-38.0mg / L, the concentration of TP in the influent is 3.1-4.3mg / L, and the average concentration of COD in the effluent is 5.6mg / L, the average concentration of TN in the effluent is 1.8mg / L, and the average concentration of TP in the effluent is lower than 0.1mg / L, which is better than the surface water class IV standard.

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
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention provides a method for deep denitrification and dephosphorization of sewage. The method comprises that (1) effluent after pretreatment flows into an ozone oxidation pool, and is treated,wherein the ozone oxidation pool comprises an ozone oxidant, and difficultly-biodegraded organic matters are oxidized into easily-degraded organic matters in the ozone oxidation pool; (2) the effluentof the ozone oxidation pool flows into a biological active carbon filtering pool, wherein the biological active carbon filtering pool comprises active carbon and a biofilm attached to the surface ofthe active carbon; and (3) the effluent obtained by the treatment in the biological active carbon filtering pool flows into an autotrophic denitrification filtering pool, and the effluent obtained bythe treatment in the autotrophic denitrification filtering pool is discharged, wherein the filler in the autotrophic denitrification filtering pool contains dolomite and elemental sulfur. According tothe present invention, with the method, based on the pre-treatment, nitrogen and phosphorus in sewage can be efficiently removed, and the COD content can be reduced.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for deep denitrification and dephosphorization of sewage. Background technique [0002] Due to the development of economy, the improvement of living standards, and the acceleration of urbanization, a large amount of nutrients such as N and P enter lakes, reservoirs and oceans along with rivers, causing increasingly serious water eutrophication problems. At present, there is an urgent need for economical and feasible nitrogen and phosphorus removal technologies to control the input of exogenous N and P nutrients, reduce the concentration of N and P in lakes, reservoirs and other water bodies, and control the process of water eutrophication. [0003] At present, sewage treatment plants are being upgraded gradually across the country, and the secondary effluent needs to be treated with deep nitrogen and phosphorus removal before it can be discharged. At present, s...

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): C02F9/14
CPCC02F1/78C02F3/00C02F3/28C02F9/00C02F2003/003
Inventor 张健君杨淑芳李继陈立春吴春雷林玉鹏张卿吕英俊闫智涛
Owner SHENZHEN MUNICIPAL DESIGN & RES INST
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