Unlock instant, AI-driven research and patent intelligence for your innovation.

A deep nitrogen and phosphorus removal method for biochemical tail water based on magnetic coagulation-adsorption coupling

A technology of deep denitrification and magnetic coagulation, applied in chemical instruments and methods, magnetic/electric field water/sewage treatment, water pollutants, etc., can solve problems such as reducing TN concentration, achieve reasonable steps, convenient operation, and excellent depth The effect of nitrogen and phosphorus removal

Active Publication Date: 2021-12-14
JIANGSU QICHUANG ENVIRONMENTAL SCI & TECH
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent document with the application number 202010188177.4 discloses a "magnetic coagulation high-efficiency rapid sedimentation purification device and process for municipal sewage treatment", which can effectively reduce the concentration of TP, SS (suspended solids), etc. The concentration of TN

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
  • A deep nitrogen and phosphorus removal method for biochemical tail water based on magnetic coagulation-adsorption coupling
  • A deep nitrogen and phosphorus removal method for biochemical tail water based on magnetic coagulation-adsorption coupling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The biochemical effluent from the secondary sedimentation tank of a sewage treatment plant has a TN of 22.6mg / L and a TP concentration of 1.04mg / L.

[0051] (A): Import the biochemical effluent from the secondary sedimentation tank into the mixing tank 1, and add PAC solution with a mass concentration of 10%, and the dosage is 3L / m 3 For the biochemical tail water, the average velocity gradient (G value) of the mixed liquid is 600 / S when stirred by the first stirrer 101, and the mixed reaction is 1.5 min;

[0052] (B): The mixed solution is introduced into the coagulation reaction tank 2, and the average velocity gradient (G value) of the mixed solution is 120 / S when being stirred by the second agitator 201, and the time control of the coagulation reaction is 6 minutes;

[0053] (C): The mixed solution of the coagulation reaction tank 2 is introduced into the adsorption reaction tank 3, and at the same time, the selectively adsorbed nitrate-type magnetic powder (either ...

Embodiment 2

[0058] The biochemical effluent from the secondary sedimentation tank of a sewage treatment plant has a TN of 28.3mg / L and a TP concentration of 1.42mg / L.

[0059] (A): Lead the biochemical effluent from the secondary sedimentation tank into the mixing tank 1, and add PAC solution with a mass concentration of 20%, and the dosage is 2L / m 3 For the biochemical tail water, the average velocity gradient (G value) of the mixed solution is 900 / S when being stirred by the first agitator 101, and the mixing reaction is 2 minutes;

[0060] (B): The mixed solution is introduced into the coagulation reaction tank 2, and the average velocity gradient (G value) of the mixed solution is 180 / S when being stirred by the second agitator 201, and the time control of the coagulation reaction is 8 min;

[0061] (C): The mixed solution of the coagulation reaction tank 2 is introduced into the adsorption reaction tank 3, and at the same time, the selective adsorption nitrate-type magnetic powder (e...

Embodiment 3

[0066] The biochemical effluent from the secondary sedimentation tank of a sewage treatment plant has a TN of 15.8mg / L and a TP concentration of 0.76mg / L.

[0067] (A): Lead the biochemical effluent from the secondary sedimentation tank into the mixing tank 1, and add PAC solution with a mass concentration of 15%, and the dosage is 1.5L / m 3 For the biochemical tail water, the average velocity gradient (G value) of the mixed solution is 700 / S when stirred by the first stirrer 101, and the mixed reaction is 1 min;

[0068] (B): The mixed solution is introduced into the coagulation reaction tank 2, and the average velocity gradient (G value) of the mixed solution is 150 / S when stirred by the second agitator 201, and the time of the coagulation reaction is controlled to be 10min;

[0069] (C): The mixed solution of the coagulation reaction tank 2 is introduced into the adsorption reaction tank 3, and at the same time, the selective adsorption nitrate-type magnetic powder (either e...

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 diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for deep denitrification and dephosphorization of biochemical tail water based on magnetic coagulation-adsorption coupling. By sequentially inputting coagulant into sewage, selectively adsorbing nitrate-type magnetic powder and coagulant aid, and finally through precipitation, Phosphate and nitrate in the biochemical tail water are deeply removed; at the same time, the magnetic powder that selectively adsorbs nitrate is recovered and reused by using magnetic recovery technology. The invention can realize the deep denitrification and phosphorus removal of the biochemical tail water, so that the TP and TN indexes of the treated biochemical tail water meet the requirements of relevant sewage discharge standards.

Description

technical field [0001] The invention relates to the field of advanced treatment of biochemical tail water, in particular to a method for deep nitrogen and phosphorus removal of biochemical tail water based on magnetic coagulation-adsorption coupling. Background technique [0002] In recent years, as my country's water pollution problems have become increasingly prominent, the improvement of the discharge standards of urban sewage plants has become the general trend. Under the trend of increasingly stringent environmental protection requirements, the discharge standards of sewage treatment plants have put forward higher and higher requirements for total nitrogen (TN) and total phosphorus (TP), gradually aligning with surface water of class III and class IV. In 2012, in Beijing's "Water Pollutant Discharge Standards for Urban Sewage Treatment Plants" (DB 11 / 890-2012), in the A standard for new sewage plants, the TN was raised from 15mg / L of Class A to 10mg / L, and the total pho...

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): C02F1/48C02F101/16C02F101/10
CPCC02F1/488C02F2101/16C02F2101/105
Inventor 许海民韩路毛亚张圣军
Owner JIANGSU QICHUANG ENVIRONMENTAL SCI & TECH