Degradation and COD removal of catechol in wastewater using the catalytic ozonation process combined with the cyclic rotating-bed biological reactor. (1st July 2015)

• Record Type: Journal Article
• Authors: Aghapour, Ali Ahmad; Moussavi, Gholamreza; Yaghmaeian, Kamyar
• Is Part Of: Journal of environmental management. Volume 157(2015)
• Page Start: 262
• Page End: 266
• Publication Date: 2015-07-01
• Subjects: Catalytic ozonation -- Magnesium oxide -- Toxic contaminants -- Biodegradation -- Combined process; Environmental policy -- Periodicals; Environmental management -- Periodicals; Environment -- Periodicals; Ecology -- Periodicals; 363.705
• DOI: 10.1016/j.jenvman.2015.02.036
• Languages: English
• ISSNs: 0301-4797

Abstract

Abstract: The effect of ozonation catalyzed with MgO/granular activated carbon (MgO/GAC) composite as a pretreatment process on the performance of cyclic rotating-bed biological reactor (CRBR) for the catechol removal from wastewater has been investigated. CRBR with acclimated biomasses could efficiently remove catechol and its related COD from wastewater at organic loading rate (OLR) of 7.82 kg COD/m 3 .d (HRT of 9 h). Then, OLR increased to 15.64 kg COD/m 3 .d (HRT of 4.5 h) and CRBR failed. Catalytic ozonation process (COP) used as a pre-treatment and could improve the performance of the failed CRBR. The overall removal efficiency of the combined process attained respective steady states of 91% and 79% for degradation and COD removal of catechol. Therefore, the combined process is more effective in degradation and COD removal of catechol; it is also a viable alternative for upgrading industrial wastewater treatment plant. Highlights: Catalytic ozonation (COP) and cyclic rotating-bed reactor (CRBR) were coupled. Catechol removal was compared in CRBR and COP as single and coupled system. Applicable catechol load on coupled system was twice as much as that on single CRBR. Catechol degradation in COP/CRBR was 91% at loading rate of 8.3 kg/m 3 .d. COP is an appropriate pretreatment option for improving the performance of CRBR.