臭氧微气泡处理酸性大红3R废水特性研究
Characteristics of Acid Red 3R Wastewater Treatment by Ozone Microbubbles
摘要 微气泡技术与臭氧废水处理相结合,有助于促进臭氧气液传质﹑改善臭氧氧化效果并提高臭氧利用率.本研究采用臭氧微气泡氧化处理酸性大红3R废水,考察了臭氧微气泡的气液传质特性以及对酸性大红3R氧化降解特性,并与臭氧传统气泡进行比较.结果表明,微气泡能够强化臭氧气液传质,相同条件下其臭氧传质系数为传统气泡的3.6倍;同时微气泡系统的臭氧分解系数为传统气泡系统的6.2倍,有利于.OH产生.臭氧微气泡可显著提高酸性大红3R氧化降解速率和矿化效率,其TOC去除率可达78.0%,约为传统气泡的2倍.臭氧微气泡处理酸性大红3R过程中的臭氧利用率显著高于传统气泡微气泡系统平均臭氧利用率为97.8%;传统气泡系统平均臭氧利用率为69.3%.臭氧微气泡通过促进.OH产生提高臭氧氧化能力,其对降解中间产物的氧化速率更快,其中对小分子有机酸的矿化能力约为传统气泡的1.6倍.
Abstract:
The appIication of microbubbIe technoIogy for ozonation wastewater treatment couId enhance ozone mass transfer, improve ozonation performance and increase ozone utiIization efficiency. The ozone microbubbIes were used to treat synthetic acid red 3R wastewater in the present study, and compared to ozone conventionaI bubbIes. The ozone mass transfer and ozonation characteristics of acid red 3R were investigated when ozone microbubbIes and ozone conventionaI bubbIes were appIied. The resuIts confirmed the enhanced ozone mass transfer using microbubbIes. The ozone mass transfer coefficient using microbubbIes was 3. 6 times higher than that using conventionaI bubbIes under the same conditions. SimuItaneousIy, the ozone decomposition coefficient using microbubbIes was 6. 2 times higher than that using conventionaI bubbIes, which wouId be favorabIe for .OH generation. The ozonation rate and mineraIization efficiency of acid red 3R couId be improved significantIy using ozone microbubbIes. A TOC removaI efficiency of 78. 0%was achieved using ozone microbubbIes, which was about 2 times higher than that using ozone conventionaI bubbIes. The ozone utiIization efficiency using microbubbIes was much higher that using conventionaI bubbIes during ozonation treatment of acid red 3R. The average ozone utiIization efficiencies were 97. 8% and 69. 3% when microbubbIes and conventionaI bubbIes were used, respectiveIy. The oXidative abiIity of ozone microbubbIes couId be increased by enhancing .OH generation, and as a resuIt, the oXidative reaction of degradation intermediates was acceIerated by ozone microbubbIes. EspeciaIIy, the mineraIization abiIity of smaII organic acid intermediates using ozone microbubbIes was about 1. 6 times higher than that using ozone conventionaI bubbIes.
Author: ZHANG Jing DU Yawei LIU Xiaojing ZHOU Yuwen LIU Chun YANG JingIiang ZHANG Lei
作者单位: 北京工业大学建筑工程学院,北京 100022; 河北科技大学环境科学与工程学院,河北省污染防治生物技术重点实验室,石家庄 050018 河北科技大学环境科学与工程学院,河北省污染防治生物技术重点实验室,石家庄 050018 北京工业大学建筑工程学院,北京,100022
刊 名 环境科学 ISTICPKU
年,卷(期): 2015, (2)
分类号: X703.1
基金项目: 河北省应用基础研究计划重点基础研究项目(11966726D);河北科技大学校立科研基金项目