Advanced treatment of bio-treated Chinese patent medicine wastewater using ozone/peroxymonosulfate-upflow biological aerated filter

• Published in: Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2020-06, Vol.390, p.124527, Article 124527
• Main Authors: Tang, Guomin, Zhang, Yongbing, Wei, Yujiang, Wang, Shuang, Liu, Pei, Jia, Zhehua, Yu, Xuemin, Ma, Fang
• Format: Article
• Language: English
• Subjects: Advanced treatment; Biotreated Chinese patent medicine wastewater; Dissolved organic matter; Ozone/peroxymonosulfate; Upflow biological aerated filter
• ISSN: 1385-8947; 1873-3212
• DOI: 10.1016/j.cej.2020.124527

•O3/PMS-UBAF efficiently treated BCPMW.•DOM was mainly removed by O3/PMS and UBAF.•Biodegradation rate of DOM was increased after O3/PMS oxidation.•O3/PMS presented reactivity selectivity. The advanced treatment of biotreated Chinese patent medicine wastewater (BCPMW) was urgently necessitated to meet the strictest wastewater discharge standard. In the present study, combined ozone/peroxymonosulfate oxidation and upflow biological aerated filter process (O3/PMS-UBAF) significantly integrated advantages of O3/PMS oxidation and UBAF, and has been demonstrated to be very effective in the advanced treatment of BCPMW. For dissolved organic matter (DOM) in BCPMW, O3/PMS oxidation efficiently degraded higher molecular weight (MW) fractions and non-biodegradable fractions. In addition, O3/PMS oxidation not only increased the overall removal of DOM but also enhanced the biodegradation rate of DOM. Therefore, the beneficial effect of O3/PMS oxidation may mainly be due to the special effect of increased biodegradability and the generalized effect on DOM. Finally, the results also indicated that compared with UBAF alone, O3/PMS-UBAF not only promoted the removal of low MW fractions (