عملكرد راكتور بافلدار بي هوازي در حذف سولفات فاضلاب شهرك صنعتي اميركبير

Operation of an Anaerobic Baffled Reactor for Sulfate Removal of Amirkabir Industrial Estate Wastewater

In this study, the performance of an anaerobic baffled reactor (ABR Pilot 100 1 and six compartments) for sulfate removal from the wastewater from Amirkabir Industrial Estate was investigated. The reactor was started with a hydraulic retention time (HRT) of 25 h at 35°C to be gradually reduced to 3.33 h. The best reactor performance was observed at a HRT of 4 h and a sulfate loading rate of 3.318 Kg S04/m3.d at which the sulfate removal efficiency was 89.15%. In this condition, the highest sulfate removal was observed in the first compartment (69.08%) which had the lowest pH as acidogenesis and acetogenesis had taken place in earlier compartments. This result demonstrated that the sulfidogenesis occurred in the acidogenic phase. Maximum sulfate removal (66.11%) was obtained when temperature was reduced to 20ｰC (HRT of 4 h). Under the same conditions, the fourth compartment which had lowest pH level exhibited maximum sulfate removal percent (28.98%). This indicates that decreasing temperature leads to the acidogenic phase to shift toward the following reactor compartments. Also, these findings are a further indication of the ability of the acidogenic phase for sulfate removal.