Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Dephosphorization method for glyphosate wastewater

A treatment method, glyphosate technology, applied in natural water treatment, water/sewage multi-stage treatment, oxidized water/sewage treatment, etc., can solve the problem of phosphorus removal in wastewater that is rarely involved

Active Publication Date: 2011-09-07
GUANGXI RES INST OF CHEM IND CO LTD +2
View PDF3 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aiming at the treatment of glyphosate production wastewater, at present, there have been many domestic researches published in various literatures, but most of the researches focus on how to degrade the COD of wastewater, while the phosphorus removal problem of this type of wastewater is rarely discussed. involved

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
  • Dephosphorization method for glyphosate wastewater
  • Dephosphorization method for glyphosate wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The glyphosate wastewater from a technology company in Guangxi was used as the water to be treated, and the phosphorus removal treatment was carried out by alkaline hydrolysis and precipitation reaction, Fenton oxidation reaction and catalytic reprecipitation process.

[0017] The specific process steps are as follows:

[0018] 1) Alkali hydrolysis and precipitation reaction: After the comprehensive wastewater is measured, put it into the alkali hydrolysis reaction kettle, adjust the pH to 7.0-8.0 with lime (calcium oxide or calcium hydroxide), and stir at 90°C for 2 hours under normal pressure for alkali hydrolysis and precipitation. Precipitation reaction, followed by dehydration and separation; slag is piled up for comprehensive utilization. The clear liquid is put into the reactor again for the next step.

[0019] 2) Fenton oxidation reaction: Fenton reagent is used to carry out oxidation reaction on the wastewater after alkali hydrolysis and precipitation reaction...

Embodiment 2

[0025] Using glyphosate wastewater from an enterprise in Guangxi as the water to be treated, the phosphorous removal treatment was carried out by using alkaline hydrolysis and precipitation reaction, Fenton oxidation reaction, and catalytic reprecipitation process.

[0026] The specific process steps are as follows:

[0027] 1) Alkali hydrolysis and precipitation reaction: After the comprehensive wastewater is measured, it is put into the alkaline hydrolysis reaction kettle, and the pH is adjusted to 7.0-8.0 with lime (calcium oxide or calcium hydroxide). Under normal pressure, stir at 70°C for 2 hours to carry out alkali hydrolysis and precipitation reaction, and then dehydrate and separate; the slag is piled up for comprehensive utilization. The clear liquid is put into the reactor again for the next step.

[0028] 2) Fenton oxidation reaction: Fenton reagent is used to carry out oxidation reaction on the wastewater after alkali hydrolysis and precipitation reaction. Throu...

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 for removing total phosphorus from glyphosate weedicide wastewater, which comprises the following process steps of: performing an alkaline hydrolysis and precipitation reaction, performing a Fenton oxidizing reaction, performing catalytic oxidation and precipitation on calcium hypochlorite and the like. The glyphosate wastewater treated by the method has an excellent dephosphorization effect, the total phosphorus content in effluent reaches the three-level standard (TP is less than or equal to 0.5 mg / L) of the national sewage discharge standard (GB 8978-1996). The dephosphorization process is safe, advanced, clean and low in wastewater treatment cost.

Description

technical field [0001] The invention relates to a method for treating pesticide wastewater, in particular to a process for removing total phosphorus from glyphosate herbicide wastewater. It belongs to the field of environmental protection. Background technique [0002] Glyphosate is a broad-spectrum, high-efficiency, low-toxicity, non-selective post-emergence herbicide. Its chemical name is N-phosphonic acid methyl-glycine, and its trade name is Roundup. In agricultural production, glyphosate has become a national herbicide. The pesticide variety with the largest export volume is also the pesticide variety with the largest output and sales volume in the world. According to industry statistics, as of 2009, my country's glyphosate production scale was about 1 million tons, accounting for 45% of the global production capacity. [0003] During the glyphosate production process, a large amount of waste water containing formaldehyde, dimethyl phosphite, bisglyphosate, glyphosate...

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 Applications(China)
IPC IPC(8): C02F9/04C02F1/72C02F103/36
Inventor 陈远霞谭波施月雪黄春林穆允玲
Owner GUANGXI RES INST OF CHEM IND CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com