Optimization of the O_(3)/H_(2)O_(2) process with response surface methodology for pretreatment of mother liquor of gas field wastewater

作     者：Haoran Feng Min Liu Wei Zeng Ying Chen Haoran Feng;Min Liu;Wei Zeng;Ying Chen

作者机构：College of Architecture and EnvironmentSichuan UniversityChengdu610065China 

出 版 物：《Frontiers of Environmental Science & Engineering》 (环境科学与工程前沿（英文）)

年 卷 期：2021年第15卷第4期

页      面：337-349页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：This study was supported by the National Science and Technology Major Project of the 13th Five-Year Plan“High-efficiency development of ultra-deep bio-herm gas reservoirs with bottom water”(No.2016ZX05017-005) 

主　　题：High salinity High organic matters Gas field wastewater O_(3)/H_(2)O_(2) Response surface methodology 

摘      要：The present study reports the use of the O_(3)/H_(2)O_(2) process in the pretreatment of the mother liquor of gas field wastewater(ML-GFW),obtained from the multi-effect distillation treatment of the gas field *** range of optimal operation conditions was obtained by single-factor *** surface methodology(RSM)based on the central composite design(CCD)was used for the optimization procedure.A regression model with Total organic carbon(TOC)removal efficiency as the response value was established(R^(2)=0.9865).The three key factors were arranged according to their significance as:pHH_(2)O_(2) dosageozone flow *** model predicted that the best operation conditions could be obtained at a pH of 10.9,an ozone flow rate of 0.8 L/min,and H_(2)O_(2) dosage of 6.2 *** dosing ratio of ozone was calculated to be 9.84 mg O3/mg *** maximum removal efficiency predicted was 75.9%,while the measured value was 72.3%.The relative deviation was found to be in an acceptable *** ozone utilization and free radical quenching experiments showed that the addition of H_(2)O_(2) promoted the decomposition of ozone to produce hydroxyl radicals(·OH).This also improved the ozone utilization *** chromatography-mass spectrometry(GC-MS)analysis showed that most of the organic matters in ML-GFW were degraded,while some residuals needed further *** study provided the data and the necessary technical supports for further research on the treatment of ML-GFW.