Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2010.316.324PasukphunN. VinitnantharatS. GheewalaS. 72010137The aim of this study is to investigate the decolorization in anaerobic/aerobic biological activated carbon (A/A BAC) system. The experiment was divided into 2 stages; stage I is batch test for preliminary study of dye removal equilibrium time. The preliminary experiment (stage I) provided the optimal data for experimental design of A/A BAC system in SBR (stage II). Stage II is A/A BAC system imitated Sequencing Batch Reactor (SBR) which consist of 5 main periods; fill, react, settle, draw and idle. React period include anaerobic phase followed by aerobic phase. The BAC main media; Granular Activated Carbon (GAC), Mixed Cultures (MC) and Biological Activated Carbon (BAC) were used for dye and organic substances removal in three different solutions; Desizing Agent Solution (DAS), dye Solution (DS) and Synthetic Textile Wastewater (STW). Results indicate that GAC adsorption plays role in dye removal followed by BAC and MC activities, respectively. In the presence desizing agent, decolorization by MC was improved because desizing agent acts as co-substrates for microorganisms. It was found that 50% of dye removal efficiency was achieved in Fill period by MC. GC/MS analysis was used to identify dye intermediate from decolorization. Dye intermediate containing amine group was found in the solution and on BAC surfaces. The results demonstrated that combination of MC and BAC in the system promotes decolorization and dye intermediate removal. In order to improve dye removal efficiency in an A/A BAC system, replacement of virgin GAC, sufficient co-substrates supply and the appropriate anaerobic: aerobic period should be considered.]]>Carliell, C.M., S.J. Barclay, N. Naidoo, C.A. Buckley, D.A. Mulholland and E. Senior,1995216169Challenor, K.C.A.B., J.S. Knapp, N.C.C. Gray, M.J. Hetheridge and M.R. Evans,20003444104418Chan, Y.J., M.F. Chong, C.L. Law and D.G. Hassell,2009155118Clesceri, L.S., A.E. Greenberg and A.D. Eaton,199820th Edn.,pp: 37-43pp: 37-43Isik, M. and T. Sponza,2004B1142939Luangdilok, W. and T. Panswad,200042377382Mahvi, A.H., A.R. Mesdaghinia and F. Karakani,2004718801883Manu, B. and S. Chaudhari,20033812131221Moreno, G., A. Cruz and G. Buitron,199940915Ning, Z., K.J. Kennedy and L. Fernandes,1988Chlorophenols.]]>19231236Ong, S.A., E. Toorisaka, M. Hirata and T. Hano,200876142146Omar, H.H.,20081113101316O'Neill, C., F.R. Hawkes, D.L. Hawkes, S. Esteves and S.J. Wilcox,20003423552361Panswad, T. and W. Luangdilok,20003441774184Pasukphun, N. and S. Vinitnantharat,20033820192028Rice, R.G. and C.M. Robson,1982Rodriguez, G.V., C.B. Youssef and J.W. Vlianova,2006117245252Sarnthima, R. and S. Khammuang,2008Pleurotus sajor-caju grown on sorghum seed media.]]>116267Shaw, C.B., C.M. Carliell and A.D. Wheatley,20023619932002Shore, J.,1990Supaka, N., K. Juntongjin, S. Damronglerd, M.L. Delia and P. Strehaiano, 200499169176Telke, A., D. Kalyani, J. Jadhav and S. Govindwar,2008Rhizobium radiobacter MTCC 8161.]]>55320329Tchobanoglous, G. and F.L. Burton,19913rd Edn.,Vidic, R.D. and T.S. Makram,19912516121618Walker, G.M. and L.R. Weatherley,199975201206Yoo, E.S., J. Libra and L. Adrian,2001127844849Zhao, X., R.F. Hickey and T.C. Voice,19993329832991Zissi, U. and G. Lyberatos,199634495500