Combined treatment method for shale gas fracturing flowback wastewater
A treatment method and technology for wastewater, applied in water/sewage treatment, oxidized water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of slow reaction speed, fast indirect oxidation reaction speed and high efficiency, and reduce pollution. , the effect of alleviating water shortage
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0033] Example 1: Under stirring conditions, a mixture of ferrous sulfate and PFS was dropped into the shale gas fracturing flowback wastewater, the mass ratio of which was 1:1, and the total dosage was 15000mg / L, and the wastewater was adjusted with an alkalizing agent at the same time The pH value is 9.5, then add polymer NSG coagulant 60mg / L, stir rapidly, and stop stirring after a large number of alum flowers are formed; take the effluent after coagulation treatment for electrolytic oxidation treatment, and add ferrous sulfate and Sodium persulfate, its consumption is respectively 4g / L and 5g / L, adjusts the pH value of waste water with alkalizing agent to be 9.0, and the current density of electrolytic oxidation is 50mA / cm 2 , the reaction time is 1.0 hour; carry out secondary coagulation to the wastewater after electrolytic oxidation treatment, add 3000mg / L coagulant ferrous sulfate under stirring conditions, and adjust the pH value of wastewater to 9.0 with an alkalizing ...
Embodiment 2
[0034] Embodiment 2: Under the condition of stirring, drop into the mixture of ferrous sulfate and ferric sulfate in the shale gas fracturing flowback wastewater, its mass ratio is 2:1, the total dosage is 20000mg / L, adjust with alkalizing agent at the same time The pH value of the wastewater is 10.0, then add polyacrylamide coagulant 70mg / L, stir quickly, stop stirring after a large number of alum flowers are formed; take the effluent after coagulation treatment for electrolytic oxidation treatment, and add ferrous sulfate at the same time and sodium persulfate, the dosage is 3g / L and 5g / L respectively, the pH value of wastewater is adjusted to 10.0 with alkalizing agent, and the current density of electrolytic oxidation is 150mA / cm 2 , the reaction time is 1.2 hours; carry out secondary coagulation to the wastewater after electrolytic oxidation treatment, add 4000 mg / L coagulant aluminum sulfate under stirring conditions, and adjust the pH value of the wastewater to 10.0 with...
Embodiment 3
[0035] Example 3: Under stirring conditions, ferrous sulfate was added to the shale gas fracturing flowback wastewater at a dosage of 18,000 mg / L. At the same time, the pH value of the wastewater was adjusted to 9.3 with an alkalizing agent, and then polyacrylamide was added to aid coagulation 65mg / L, stirring quickly, stop stirring after a large amount of alum flowers are formed; take the effluent after coagulation treatment for electrolytic oxidation treatment, and add ferrous sulfate and sodium persulfate at the same time, the dosage is 4g / L and 6g respectively / L, adjust the pH value of wastewater to 9.5 with alkalizing agent, and the current density of electrolytic oxidation is 200mA / cm 2 , the reaction time is 0.8 hours; carry out secondary coagulation to the wastewater after electrolytic oxidation treatment, add 2500 mg / L coagulant ferrous sulfate under stirring conditions, and adjust the pH value of the wastewater to 9.5 with an alkalizing agent at the same time, and th...
PUM
![No PUM](https://static-eureka-patsnap-com.libproxy1.nus.edu.sg/ssr/23.2.0/_nuxt/noPUMSmall.5c5f49c7.png)
Abstract
Description
Claims
Application Information
![application no application](https://static-eureka-patsnap-com.libproxy1.nus.edu.sg/ssr/23.2.0/_nuxt/application.06fe782c.png)
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
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