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
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  • 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

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

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Experimental program
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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, ...

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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

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 陈银广郑雄刘鹏陈红
Owner TONGJI UNIV
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