Abstract:
This work aimed to study the efficiency of Granular Activated Carbon - SequencingBatch Reactor (GAC-SBR) for treating slaughterhouse wastewater that contained CODconcentration of 1,000 mg/l. The experiments were concer~cdin chemical adsorption ability ofGAC in jar test system and SBR system. The effects of HRT on the removal efficiency ofGAC-SBR and SBR systems were also investigated with expect to COD, BOD,, TKN, Greaseand Oil, TP and SSThe results showed that the nlaxinlal COD and TKN adsorption capacities of GACwere 922.00 mdgGAC and 48.00 mg/gGAC, respectively. When the used GAC was determined,it was found that the COD and TKN adsorption capacities of used GAC that collected fromGAC-SBR system was almost stable. The COD and TKN adsorptioll capacities of used GACwere reduced only 0.84 and 13.07%, respectively when it was compared with raw GAC.Whereas those of COD and TKN remnval efficiencies of GL4C by the aeration in SBR systemwas increased by 65.41 and 75.01% sequentially, when it was compared with mixing withoutaeration system. In addition, the adsorption capacities of GAC was highest at the GACconcentration of 1,000 mg/l. The results were also showed that at HRT of 2, 4, 6 and 8 days theCOD and TKN concentration in effluent of GAC-SBR system were 48, 79, 47 and 38 mg/l, and16, 20, 20 and 17 mg/l, respectively. In the case of SBR system, the COD and TKNcollcentration of effluent were 59,95,58, 55 mg/l, and 18, 25,27 and 22 mg/l, respectively.It was concluded that the GAC-SBR system had the efficiency of eliminating CODand TKN greater than 90 and 75%, respectively. Then, the GAC-SBR system might be one ofthe suitable wastewater treatment system for treating the slaughterhouse wastewater due to theincreasing of removal efficiency.