JINChang-lin.Pilot Study on Re-concentration and Reduction of Concentrated Liquid from Membrane Separation of Coking Wastewater[J].China Water & Wastewater,2024,40(9):31-34.
Pilot Study on Re-concentration and Reduction of Concentrated Liquid from Membrane Separation of Coking Wastewater
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第9期
Page:
31-34
Column:
Date of publication:
2024-05-01
- Keywords:
- coking wastewater; re-concentration and reduction; ozonation; electrocatalytic oxidation; DTRO; membrane separation
- Abstract:
- The demand for further recovery and zero discharge of the concentrated liquid produced in the recovery process of coking wastewater has become more pressing. In this study, the process consisting of ozonation, electrocatalytic oxidation and dish tube reverse osmosis membrane (DTRO) was proposed to concentrate and reduce the residual concentrated liquid from coking wastewater after membrane separation. The experiment was carried out with the following parameters: influent flow of 1.0 m3/h, ozone concentration of 200 g/h, oxygen evolution potential of electrocatalytic oxidation electrode of 2.1-2.4 V and high-pressure DTRO water production pressure of 6.8 MPa. The process demonstrated the removal rate of 94.96% for COD. The average wastewater recovery rate reached 80.5%, and the average desalination rate was more than 98%. The chemical cleaning cycle of DTRO was not less than 1 month and good recovery performance was obtained. The quality of the produced water stably met the quality requirement of reclaimed water used as make-up water for intercooled open circulating cooling water system specified in Code for Design of Industrial Recirculating Cooling Water Treatment (GB/T 50050-2017).
Last Update:
2024-05-01