Composite phosphate removing agent for removing high-concentration phosphorus-containing waste water and application method thereof

A compound dephosphorization agent and high-concentration technology, applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as difficult dehydration, high water content of chemical sludge, and difficult treatment

Inactive Publication Date: 2009-11-11
JIANGSU POLYTECHNIC UNIVERSITY +1
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is simple in process, reliable in operation, and can meet higher effluent total phosphorus requirements, but the process is a precipitation-dissolution equilibrium reaction. On the one hand, the alkalinity in the wastewater causes some metal hydroxides to precipitate, consuming a part of the amount of medicine; On the other hand, in order to achieve a lower concentration of phosphorus ions, it is necessary to maintain a higher concentration of metal ions in the wastewater. Due to the quasi-equilibrium phenomenon (pseudo2equilibrium) of tiny precipitated particles, the apparent solubility product is much higher than the

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 15% oxalic acid, 20% methylcyclohexanol, 40% talcum powder and 25% sodium ferrate were formulated as a compound phosphorus removal agent to treat phosphorus in a pharmaceutical wastewater in Changzhou City. The phosphorus content in the wastewater was 1450mg / L During the test, take 50L of waste water, add 1L of high ammonium waste water with an ammonia nitrogen content of 14800mg / L, then take 10mL of dephosphorization agent in 5L of water, add it to the phosphorous waste water together with high ammonium waste water after dilution, and adjust the pH=8.5, Stir for 15 minutes, then carry out air flotation, and remove the residue of air flotation with a slag scraper. The phosphorus content in the effluent is 0.23mg / L, and the removal rate is 99.98%.

Embodiment 2

[0017] 10% of tartaric acid, 25% of diethylene glycol, 50% of talc and 15% of sodium ferrate were formulated as a compound phosphorus removal agent to treat phosphorus in a certain chemical wastewater in Changzhou City. The phosphorus content in the wastewater was 2380mg / L. Take 50L of wastewater, add 2L of high ammonium wastewater with an ammonia nitrogen content of 14800mg / L, then take 20mL of phosphorus removal agent in 10L of water, dilute it and add it to the phosphorus-containing wastewater together with the high ammonium wastewater, adjust the pH to 8.0, and stir for 30 minutes , and then carry out air flotation, and the residue of air flotation is removed with a slag scraper. The phosphorus content in the effluent is 0.35mg / L, and the removal rate is 99.99%.

Embodiment 3

[0019] 15% of ascorbic acid, 15% of diethylene glycol, 60% of talc and 10% of sodium ferrate were formulated as a compound phosphorus removal agent to treat phosphorus in a pharmaceutical wastewater in Changzhou City. The phosphorus content in the wastewater was 3800mg / L. During the test, take 50L of wastewater, add 2L of high-ammonium wastewater with an ammonia nitrogen content of 28000mg / L, then take 30mL of phosphorus removal agent in 15L of water, add it to the phosphorus-containing wastewater together with high-ammonium wastewater after dilution, and adjust the pH to 9.0, stir After 20 minutes, air flotation is carried out again, and the residue of air flotation is removed with a slag scraper. The phosphorus content in the effluent is 0.39mg / L, and the removal rate is 99.99%.

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 composite phosphate removing agent for removing high-concentration phosphorus-containing waste water and an application method thereof, and belongs to the field of sewage disposal in environmental protection. The composite phosphate removing agent is formed by mixing organic substances and inorganic substances, wherein the organic substances refer to organic acid and organic alcohol, and the inorganic substances refer to talcum powder, sodium ferrate and the like. The composite phosphate removing agent comprises the following compositions: 5 to 20 percent of organic acid, 5 to 20 percent of alcohol, 20 to 85 percent of talcum powder and 20 to 85 percent of sodium ferrate. The method comprises the following steps: adding the composite phosphate removing agent with the proportion into the high-concentration phosphorus-containing waste water, wherein the adding amount is between 100 and 1,000 ppm; using waste water containing ammonia nitrogen to adjust the pH value of the phosphorus-containing waste water to 8.0 and 9.0; stirring the mixture for 5 to 30 minutes; and performing air floatation treatment. The yielding water can reach the first-class emission standard of the country. The invention has the characteristics of simple technological flow, relatively low pharmaceutical dosage, low operation cost, low sludge yield, high phosphate removing effect, and the like.

Description

technical field [0001] The invention relates to a phosphorus removal agent for treating high-concentration phosphorus-containing wastewater, relates to the removal of phosphate ions in phosphorus-containing wastewater, and belongs to the field of wastewater treatment in environmental protection. Background technique [0002] Phosphorus and nitrogen are the main elements that cause eutrophication of water bodies, and phosphorus is the most critical. Exceeding a certain amount of phosphorus in water bodies will cause excessive growth of algae, resulting in severe hypoxia in water bodies, death of aquatic organisms, and deterioration of water quality. In the past ten years, the proportion of eutrophic water bodies in my country has increased from 5.0% to about 55%, while the proportion of oligotrophic water bodies has decreased from 3.2% to 0.53%. It has become an urgent problem to study the phosphorus removal technology of wastewater and control the discharge of phosphorus. ...

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): C02F1/58
Inventor 雷春生王桂玉郭晓波
Owner JIANGSU POLYTECHNIC UNIVERSITY
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