Treatment method for reverse osmosis concentrated water

A reverse osmosis concentrated water and treatment method technology, which is applied in the field of reverse osmosis concentrated water standard treatment, can solve the problems of poor biodegradability, failure to meet COD emission standards, continuous and stable operation of ozone generators, ozone generation cost problems, etc., to achieve well-developed pores , Remarkable treatment effect, good chroma removal effect

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP
View PDF8 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the COD of the secondary biochemical effluent has reached the discharge standard of 50mg / L, due to its poor biodegradability, after physical concentration by ultrafiltration-reverse osmosis process, the biodegradability of reverse osmosis concentrated water is still very poor. The salt content of the water is relatively high, and the conductivity is usually above 5000μs. Conventional treatment methods cannot meet the most stringent emission standard of COD less than 50mg / L
The dosage of ozone in this invention is 120-145mg / L. The continuous and stable operation of the ozone generator and the cost of generating ozone are the problems that plague the current use of this technology.

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 for reverse osmosis concentrated water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The reverse osmosis concentrated water of a biochemical standard wastewater reuse unit in an oil refinery, with a COD of 200mg / L, enters figure 1 In the process flow shown, the main process parameters of each processing unit are:

[0039] (1) Electrolytic catalytic oxidation. The reverse osmosis concentrated water is added sulfuric acid to the raw water tank to adjust the pH value to 3.0, and enters the electrolytic catalytic oxidation reactor for electrolytic catalytic oxidation. The catalyst in the electrolytic catalytic oxidation reactor supports metal ions including Cu 2+ , Fe 2+ , Fe 3+ , Mn 2+ 、Ni 2+ , the electrode material is 316L stainless steel, the electrode spacing is 2cm, and the current density is 20mA / cm 2 , the reaction time is 30 minutes, and the COD of the electrolytic catalytic oxidation water is 97mg / L.

[0040] (2) Iron-carbon micro-electrolysis. The iron-carbon micro-electrolysis reactor is filled with iron-carbon fillers, the reaction gas-w...

Embodiment 2

[0045] The reverse osmosis concentrated water of a biochemical standard sewage reuse device in an oil refinery, with a COD of 180mg / L, enters figure 1 In the process flow shown, the main process parameters of each processing unit are:

[0046] (1) Electrolytic catalytic oxidation. Sulfuric acid is added to the raw water tank to adjust the pH value to 2.8, and the reverse osmosis concentrated water enters the electrolytic catalytic oxidation reactor for electrolytic catalytic oxidation. The catalyst in the electrolytic catalytic oxidation reactor carries metal ions including Cu 2+ , Fe 2+ , Fe 3+ , Mn 2+ , the electrode material is 316L stainless steel, the electrode spacing is 4cm, and the current density is 27mA / cm 2 , the reaction time is 25 minutes, and the COD of the electrolytic catalytic oxidation water is 90mg / L.

[0047] (2) Iron-carbon micro-electrolysis. The iron-carbon micro-electrolysis reactor is filled with iron-carbon fillers, the reaction gas-water ratio ...

Embodiment 3

[0052] The reverse osmosis concentrated water of a biochemical standard sewage reuse device in an oil refinery, with a COD of 150mg / L, enters figure 1 In the process flow shown, the main process parameters of each processing unit are:

[0053] (1) Electrolytic catalytic oxidation. The concentrated reverse osmosis water is added with hydrochloric acid to the raw water tank to adjust the pH value to 2.7, and enters the electrolytic catalytic oxidation reactor for electrolytic catalytic oxidation. The catalyst in the electrolytic catalytic oxidation reactor carries metal ions including Cu 2+ , Fe 2+ , Fe 3+ , Mn 2+ , the material of the electrode material is carbon, the electrode spacing is 3cm, and the current density is 15mA / cm 2 , the reaction time is 20 minutes, and the COD of the electrolytic catalytic oxidation water is 72mg / L.

[0054] (2) Iron-carbon micro-electrolysis. The iron-carbon micro-electrolysis reactor is filled with iron-carbon fillers, the reaction gas-w...

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 relates to a treatment method for reverse osmosis concentrated water, in particular to a standard treatment method for the reverse osmosis concentrated water which is produced during sewage reusing. The treatment method comprises the following steps: the pH value of the reverse osmosis concentrated water is regulated to be 2.0-4.0, and electrolytic catalysis oxidation is carried out; water produced from the electrolytic catalysis oxidation is subjected to redox reaction in an electrolytic reactor, which is filled with iron-carbon fillers obtained through sintering of iron and carbon; hydrogen peroxide is then added, so that oxygenolysis is further achieved; the pH value is regulated to be 6.0-8.0, and a flocculant is added for flocculent settling; a supernate obtained from the flocculent settling enters an aeration biological tank, and a co-substrate is added for biological degradation. The COD of the reverse osmosis concentrated water with lower biodegradability, which is obtained through reverse osmosis reusing treatment after standard biochemical treatment, is reduced from 70-200 milligrams per liter to below 50 milligrams per liter, so that the strictest local emission standards can be met.

Description

technical field [0001] The invention relates to a reverse osmosis concentrated water treatment method, in particular to a standard-reaching treatment method for reverse osmosis concentrated water generated in the process of sewage reuse. Background technique [0002] With the continuous development of my country's industrialization process, a large number of industrial pollutants have been discharged into the natural environment, bringing more and more serious pollution to natural water bodies. This pollution will not only increase the cost of human use of water resources, but also endanger The resulting water shortage has become an important factor restricting my country's economic and social development. Using advanced sewage reuse technology to recycle sewage after treatment can not only save a lot of water resources, but also greatly reduce the discharge of sewage. Therefore, the new technology of sewage reuse has attracted much attention and has been achieved after years...

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): C02F9/14
CPCC02F1/46176C02F1/52C02F1/66C02F1/722C02F3/02C02F9/00C02F2001/46133
Inventor 黄斌邹宗海潘咸峰王建娜
Owner CHINA PETROLEUM & CHEM CORP
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