Treatment method of high-concentration phosphorus-containing wastewater

A treatment method and high-concentration technology, applied in metallurgical wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of slow reaction, incomplete network breaking, large amount of waste residue, etc. Easy to operate, eliminates the need to deal with sediments, and has the effect of low engineering cost

Inactive Publication Date: 2019-06-14
文树龙
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for treating high-concentration phosphorus-containing wastewater by using calcium hydroxide-nickel oxyhydroxide to catalyze hypochlorous acid to solve the problems of slow reaction, incomplete network breaking and large amount of waste residue in the prior art

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
  • Treatment method of high-concentration phosphorus-containing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Taking high-concentration phosphorus-containing wastewater from a factory in Zhongshan as the treatment object, the total phosphorus of the raw water quality is 790.58mg / L, the pH is 3.0, and the chemical oxygen demand COD is 897.36mg / L.

[0038] Add the raw water of electroplating wastewater to the first sedimentation tank, add sodium hydroxide to adjust the pH to 8.5, and carry out the reaction for 4 hours to remove most of the orthophosphate. The wastewater flows into the oxidation tank by itself, and 0.6 kg per ton of wastewater is added to the oxidation tank. The amount of calcium hypochlorite was added, 0.2 kg of catalyst was added to each liter of waste water, and the reaction was carried out for 4 hours; after the reaction, the mixed liquid flowed into the coagulation tank, 3g of PAM was added to each ton of waste water for coagulation, and then the mixer was started to stir, and the waste water was coagulated The residence time in the tank is 15min (the fast mix...

Embodiment 2

[0040] Taking high-concentration phosphorus-containing wastewater from a factory in Zhuhai as the treatment object, the total phosphorus in the raw water quality is 1430.58mg / L, and the pH is 2.7.

[0041] Add the phosphorus-containing wastewater raw water to the first sedimentation tank, add sodium hydroxide to adjust the pH to 12, and carry out the reaction for 4 hours. The wastewater flows into the oxidation tank by itself, and calcium hypochlorite is added in an amount of 1.2 kg per ton of wastewater in the oxidation tank. , add 0.5kg of catalyst per ton of wastewater, and react for 4 hours; after the reaction, the mixed solution flows into the coagulation tank, and 10g of PAM is added to each ton of wastewater for coagulation, and then the mixer is started to stir, and the retention time of wastewater in the coagulation tank The time is 15min (the fast mixing tank stays for 5min, the speed is 300r / min; the slow mixing tank stays for 10min, the speed is 300r / min); the effluen...

Embodiment 3

[0043] Taking high-concentration phosphorus-containing wastewater from a factory in Zhuhai as the treatment object, the total phosphorus of the raw water quality is 958.5mg / L, the pH is 3.1, and the COD is 238.16mg / L.

[0044] Add the raw water of the electroplating wastewater into the first sedimentation tank, add sodium hydroxide to adjust the pH to 9.8, and carry out the reaction for 4 hours. The supernatant of the wastewater flows into the oxidation tank by itself, and in the oxidation tank, add 0.8 kg per ton of waste water to add once Calcium chlorate, add 0.5mol of catalyst per ton of waste water, and react for 4 hours; after the reaction, the mixed solution flows into the coagulation tank, and 7gPAM is added to each ton of waste water for coagulation, and then the mixer is started to stir, and the waste water is in the coagulation tank The residence time in the tank is 15 minutes (the fast mixing tank stays for 5 minutes, and the rotation speed is 300r / min; the slow mix...

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 discloses a treatment method of high-concentration phosphorus-containing wastewater. The method comprises the following steps: enabling the wastewater to flow into a first sedimentationtank, adding calcium hydroxide and calcium chloride, adjusting the pH value to 8.5-12.0, recovering calcium phosphate precipitate, enabling the supernatant to automatically flow into an oxidation tank, and sequentially adding calcium hypochlorite and calcium hydroxide-nickel oxyhydroxide into the oxidation tank for full reaction; then, allowing the wastewater to automatically flow into a coagulating tank in which polyacrylamide is added and a second sedimentation tank for coagulating sedimentation, and discharging the supernatant into an adjusting tank and detecting whether to reach the standard or not; and allowing the precipitate to flow back to the oxidation tank. According to the method provided by the invention, orthophosphate is firstly removed by utilizing calcium chloride and calcium hydroxide, then hypochlorous acid is accelerated to be converted into free oxygen by utilizing calcium hydroxide-nickel oxyhydroxide to accelerate the reaction between the free oxygen and complex phosphorus or organic phosphorus, and the generated orthophosphate is quickly combined by utilizing excessive calcium ions to form calcium phosphate precipitate. And finally, comprehensive removal of phosphorus is realized, and the wastewater treatment cost is reduced.

Description

technical field [0001] The invention relates to the technical field of environmental protection wastewater treatment, in particular to a treatment method for high-concentration phosphorus-containing wastewater. Background technique [0002] Nitrogen and phosphorus are important pollutants in water bodies. Nitrogen and phosphorus discharged into water bodies as pollutants will cause eutrophication of water bodies and destroy aquatic ecosystems. At present, the methods for removing phosphorus in water mainly include chemical precipitation method, redox method, ion exchange method, membrane separation method, adsorption method and so on. Although the conventional chemical precipitation method and redox method can effectively reduce high-concentration phosphorous-containing wastewater, the effluent quality still fails to meet the national direct discharge standard. In the tail water treatment, the cost of ion exchange method and membrane separation method is too high. The adso...

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): C02F9/04C01B25/32C02F101/10C02F101/30C02F103/16
Inventor 文树龙
Owner 文树龙
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