Check patentability & draft patents in minutes with Patsnap Eureka AI!

Method for treating organic phosphorus in wastewater

A technology for treating wastewater and organic phosphorus, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc. Application and other issues, to achieve the effect of not easy to lose, high recovery rate, and reduce the content of inorganic phosphorus

Inactive Publication Date: 2015-07-01
CHENGDU TECHCAL UNIV
View PDF6 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reason for using the harsh reaction conditions above is that organophosphorus is extremely difficult to degrade and has flame-retardant properties (preventing the transfer of free radicals such as .H, .OH, and .O in combustion or oxidation reactions). The effect is still not ideal
At the same time, due to the harsh reaction conditions of high temperature and high pressure, equipment corrosion, operation, investment, operation and maintenance all face major technical, economic and safety problems
Therefore, wet oxidation is still difficult to apply on a large scale in the treatment of organic phosphorus wastewater at home and abroad.

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
  • Method for treating organic phosphorus in wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The observation period of this embodiment is 3 months.

[0030] The wastewater of a fine chemical factory is rich in organic phosphorus, and its total phosphorus concentration is about 90-100 mg / L; the organic phosphorus concentration (total phosphorus concentration-inorganic phosphorus concentration) is about 55-60 mg / L. The waste water is directly passed into the biochemical reaction unit, and the biochemical reaction unit is a plug-flow structure. The biochemical reaction unit contains microorganisms, and the existence of microorganisms in the biochemical reaction unit is similar to activated sludge. The microorganisms mainly include methane oxidizing bacteria, followed by nitrifying bacteria, nitrosifying bacteria, denitrifying bacteria, anammox bacteria, etc. The concentration of suspended bacteria is about 6000mgMLSS / L. The methane gas comes from the anaerobic facility of the enterprise wastewater, and is passed into the biochemical treatment unit through jet aer...

Embodiment 2

[0037] The observation period of this embodiment is 3 months.

[0038] The wastewater of a fine chemical factory is rich in organic phosphorus, the total phosphorus concentration is about 1600-1800mg / L; the organic phosphorus concentration is about 1400-1500mg / L. The waste water is directly passed into the biochemical reaction unit. The biochemical reaction unit contains microorganisms, which exist in the biochemical reaction unit through the biological fluidized bed method (that is, the microorganisms grow on the surface of the filler in the form of a biofilm). The microorganisms mainly include methane oxidizing bacteria, followed by nitrifying bacteria and nitrosifying bacteria. , denitrifying bacteria, anammox bacteria, aerobic heterotrophic bacteria. The converted concentration of mixed bacterial biofilm is about 12000mgMLSS / L. Methane comes from utility natural gas, and oxygen-containing gas comes from electrolytic oxygen production and fan oxygen supply respectively. ...

Embodiment 3

[0045] The observation period of this embodiment is 3 months.

[0046] The wastewater of a fine chemical factory is rich in organic phosphorus, the concentration of organic phosphorus is about 180-200mg / L, and the inorganic phosphorus is not detected. The waste water is directly passed into the biochemical reaction unit. The biochemical reaction unit contains microorganisms, and the microorganisms grow on the surface of the mobile suspended biological filler. Microorganisms mainly include methane oxidizing bacteria, followed by nitrifying bacteria, nitrosifying bacteria, denitrifying bacteria, anammox bacteria and aerobic heterotrophic bacteria. The concentration of suspended sludge is about 12000mg / L, the concentration of filler-attached sludge is about 10000-22000mg / L, and the concentration of total microorganisms is about 22000-34000mg / L. The methane gas and oxygen-containing gas are passed into the biochemical reaction unit. The methane gas is natural gas after desulfuri...

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 method for treating organic phosphorus in wastewater. The method can convert organic phosphorus into inorganic phosphorus by treating wastewater in at least one biochemical reaction unit, wherein the biochemical reaction unit comprises a gas containing oxygen and methane as well as microorganisms; the microorganisms include methane-oxidizing bacteria; the gas containing oxygen and methane, the microorganisms and the organic phosphorus-containing wastewater are mixed and contacted in the biochemical reaction unit; and the concentration of phosphorus existing in an organic phosphorus form in the wastewater is more than 5mg / L. The method disclosed by the invention can effectively overcome the shortcomings that phosphorus removal rate is low and inorganic phosphorus cannot be recovered when organic phosphorus and inorganic phosphorus are removed in a mode of discharging proliferated microorganism cells. Water discharged from a phosphorus recovery unit is nearly free from organic phosphorus, which is completely consistent with national safe discharge standard on organic phosphorus in wastewater; therefore, the method can effectively treat the organic phosphorus in the wastewater and reduce pressure from environmental protection.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, in particular to a method for treating organic phosphorus in wastewater. Background technique [0002] Organophosphorus compounds refer to organic compounds containing carbon-phosphorus bonds. At present, organophosphorus compounds are widely used in pesticides, medicines, flame retardant and other industries, with a large range of use and a large amount of use. The organophosphorus intermediates or compounds involved are: dimethyl phosphite, trimethyl phosphite, methyl thiophosphoryl chloride, dimethyl thiophosphoryl chloride, diethyl thiophosphoryl chloride, dimethyl disulfide Phosphoric acid (salt), diethyl dithiophosphoric acid (salt), etc. The organophosphorus pesticides involved include phorate, terbufos, methamidophos, omethoate, profenofos, dimethoate, isacarbophos, fenitrothion, phoxim, isomazine, Malathion, Acephate, Chlorpyrifos Methyl, Chlorpyrifos, Triazophos, Trichlo...

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): C02F3/34C02F101/30
Inventor 陆一新吴菊珍赵立赵康周筝景江
Owner CHENGDU TECHCAL UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com