Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Method for disinfecting and sterilizing wastewater

A technology for disinfection and wastewater treatment, applied in chemical instruments and methods, sterilization/microdynamic water/sewage treatment, water/sewage treatment, etc., can solve problems such as high bromine content, poor biocidal power, and poor biodegradability, and achieve The effect of high bactericidal activity, fast reaction speed and simple method

Pending Publication Date: 2020-12-29
CHINA PETROLEUM & CHEM CORP +1
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the long-term use of chlorine-containing sterilants, the following disadvantages have been found: the effective killing pH value range of chlorine-containing sterilizers is narrow, and the lowest dissociation reaction occurs at a pH of 7.0. When the pH value continues to rise, Hypochlorous acid is easily dissociated into hypochlorous acid ions with extremely poor killing power, so when the pH value is greater than 7.5, the effect is significantly reduced, and the bactericidal effect can only be maintained by increasing the amount of chlorine supplement
[0008] In the process of chemical production such as medicine, catalyst production, and pesticides, high-concentration bromine-containing wastewater is often produced. This type of wastewater often has high bromine content and poor biochemical properties. Currently, this type of wastewater is usually treated by mixing it with other wastewater for biochemical treatment. However, due to the poor biochemical properties of this kind of wastewater, entering the biochemical system will have an impact on the biochemical system, so it is necessary to study a better treatment method for this kind of water

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

[0034]The sewage reuse unit of a refining and chemical enterprise has a serious problem of biofouling of the UF and RO membranes, and the membrane flux decays rapidly. It is necessary to add an oxidizing bactericide to the influent water for sterilization. The bromine-containing production wastewater of the nearby catalyst factory has bromide ions as 2170mg / L, pH 7.5, COD value 78.2mg / L. The bromine-containing wastewater is introduced into the electrolysis reactor, and the operating conditions are as follows: graphite is used as the positive electrode, stainless steel is used as the negative electrode, the voltage is 10v, the current intensity is 10A, the wastewater stays in the reactor for 15 minutes, and the wastewater containing hypobromous acid is electrolyzed Slowly discharge into the double-membrane water inlet adjustment tank to sterilize the double-membrane water inlet. The resulting membrane fouling was significantly reduced, and the RO cleaning time was extended from...

Embodiment 2

[0036] The circulating water system of a hotel and the storage tank of the cooling tower have serious microbial growth, the amount of slime is large, and the pool wall is covered with green moss. The bromine-containing wastewater of a chemical plant, Br -1 4988.9mg / L, COD value 178.2mg / L, after mixing with circulating cooling water at a ratio of 1:45, the pH value of the mixture is 8.9, and enters the electrolytic reactor processing unit. The operating conditions are determined as follows: the electrochemical processing unit uses graphite as the anode Electrode, stainless steel is the negative electrode, the voltage is 20v, the current intensity is 40A, the electrolysis time in the reactor is 5 minutes, and the number of heterotrophic bacteria in the treated wastewater is from 5.0×10 8 , down to 1.0×10 3 , the amount of slime in the water is greatly reduced, and the moss on the pool wall falls off.

Embodiment 3

[0038] Circulating cooling water plant of a petrochemical enterprise, with water volume of 2000m 3 , circulation volume 5800m 3 / h, the pH value of the circulating water is 8.7, due to the long-term use of UCl to sterilize, the microorganisms have a certain resistance, and the treatment effect of chlorine-containing bactericides decreases under alkaline conditions, and the number of heterotrophic bacteria in the water reaches 5.0×10 7 , the amount of slime is 10.2mg / L. Brominated waste water from a chemical plant, Br -1 3748.9mg / L, COD value 216.2mg / L, connected to an electrolytic reactor on the bypass of the circulating water system, with a volume of 50m 3 , introduce bromine-containing wastewater into the electrolysis reactor for electrolysis, operating conditions: graphite is used as the anode electrode, stainless steel is used as the cathode electrode, the current intensity is 40A, the residence time of bromine-containing wastewater in the reactor is 25 minutes, and the...

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 disinfecting and sterilizing wastewater, and particularly relates to a method for disinfecting and sterilizing by utilizing bromine in bromine-containing wastewater. The method comprises the following steps: mixing bromine-containing wastewater and wastewater to be sterilized, introducing the mixture into an electrolytic reactor, and carrying out an electrolytic reaction, or electrolyzing the bromine-containing wastewater, and introducing the electrolyzed bromine-containing wastewater into the wastewater to be sterilized for disinfection. After being treated by the method, heterotrophic bacteria, sulfate reducing bacteria, iron bacteria, thiobacillus, escherichia coli and the like in the wastewater to be sterilized are greatly reduced, and the sterilization rate is greater than 90% or above.

Description

technical field [0001] The invention relates to a treatment method for disinfection and sterilization of wastewater, in particular to a method for disinfection and sterilization by using bromine in bromine-containing wastewater. Background technique [0002] In the industrial water circulation system, the excessive reproduction of microorganisms will lead to the following consequences: 1. Microbial corrosion, which can mainly be manifested as severe uniform corrosion, crevice corrosion and stress corrosion cracking; 2. The increase of microbial slime will not only reduce the exchange rate The cooling effect of heaters and cooling towers will deteriorate water quality, and will also cause under-deposit corrosion of metals attached to slime. In order to inhibit and kill microorganisms and algae, the method of adding bactericidal algicides is often used. Bactericides are divided into Oxidizing and non-oxidizing biocides. [0003] At present, chlorine-containing bactericides ar...

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): C02F1/467C02F1/50
CPCC02F1/4674C02F1/50C02F2303/04
Inventor 马欣高峰赵锐
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
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