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

Biomass-emission-free method for enhancing biological wastewater nitrogen and phosphorus removal effect

A biomass and biological phosphorus removal technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as easy corruption, secondary pollution, high organic matter content, and achieve The effect of enhancing the effect

Active Publication Date: 2014-02-26
TONGJI UNIV
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high content of organic matter, these biomasses (mainly proteins and polysaccharides) are highly perishable, so if they are not properly handled and disposed of, they will cause serious secondary pollution to the environment around the stacking and discharge areas

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
  • Biomass-emission-free method for enhancing biological wastewater nitrogen and phosphorus removal effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Sewage directly enters the biological phosphorus and nitrogen removal reactor, and after biological phosphorus and nitrogen removal, the mud-water separation is carried out in the secondary settling tank, and the BCPC system is not installed. The phosphorus removal efficiency of the final sewage is 61%, the nitrogen removal efficiency is 53%, the biomass content in the discharged waste solid residue is 62%, and the effluent does not meet the first-class A discharge standard.

Embodiment 2

[0022] Sewage directly enters the biological phosphorus and nitrogen removal reactor, and after biological phosphorus and nitrogen removal, the sludge-water separation is carried out in the secondary sedimentation tank; part of the separated sludge is returned to the sewage biological phosphorus and nitrogen removal reactor, and the other part of the sludge enters the biological Substance anaerobic converter, the residence time of biomass in the anaerobic converter is controlled to be 21 days, and the pH value is 8. After the reaction product passes through the solid-liquid separation tank for solid-liquid separation, the liquid is transported to the liquid carbon source storage tank to supplement the carbon source concentration in the influent; the solid matter enters the primary treatment tank, and the H 2 o 2 The usage amount is 0.2 times of the biomass, and then enters the secondary treatment pool, the usage amount of the secondary treatment agent is 0.3 times of the bioma...

Embodiment 3

[0024] Sewage directly enters the biological phosphorus and nitrogen removal reactor, and after biological phosphorus and nitrogen removal, the sludge-water separation is carried out in the secondary sedimentation tank; part of the separated sludge is returned to the sewage biological phosphorus and nitrogen removal reactor, and the other part of the sludge enters the biological Substance anaerobic converter, the residence time of biomass in the anaerobic converter is controlled to be 30 days, and the pH value is 8. After the reaction product passes through the solid-liquid separation tank for solid-liquid separation, the liquid is transported to the liquid carbon source storage tank to supplement the carbon source concentration in the influent; the solid matter enters the primary treatment tank, and the H 2 o 2 The usage amount is 2 times of the biomass, and then enters the secondary treatment pool, the usage amount of the secondary treatment agent is 1 times of the biomass, ...

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 biomass-emission-free method for enhancing a biological wastewater nitrogen and phosphorus removal effect. Two parts including a biological wastewater treatment system (short for BWT system) and a biomass circulating carbon source production system (short for BCPC system) are provided in the method. The method comprises the concrete steps of carrying out sludge-water separation in a secondary sedimentation tank after biologically removing nitrogen and phosphorus in the wastewater; enabling a part of separated sludge to flow back to a biological wastewater nitrogen and phosphorus removal reactor and the other part of sludge to enter an anaerobic biomass converter; then, carrying out solid-liquid separation, wherein the liquid (a carbon source required for wastewater phosphorus and nitrogen removal) is delivered to a liquid carbon source storage pool (for replenishing the concentration of the carbon source in feed water), and solid substances circularly enter the anaerobic biomass converter many times after being subjected to first-stage and second-stage treatments, so that no biomasses are discharged finally, and the wastewater nitrogen and phosphorus removal effect is remarkably enhanced.

Description

technical field [0001] The invention belongs to the technical field of biological treatment of water, waste water or sewage, and relates to a new method for enhancing phosphorus and nitrogen removal in sewage without sludge biomass discharge. Background technique [0002] Activated sludge method is a method of urban sewage treatment commonly used in countries all over the world. At present, the activated sludge process accounts for more than 85% of the new urban sewage plants in my country. It is predicted that the activated sludge method will still be the leading technology for urban sewage treatment in my country for a long time to come. With the increasingly serious complex pollution of water bodies, the sewage discharge standards of countries around the world are becoming increasingly stringent, which poses new challenges to urban sewage treatment technologies and processes. my country has also put forward new control requirements for the discharge water quality and en...

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): C02F9/14
Inventor 陈银广郑雄刘鹏陈红
Owner TONGJI UNIV
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