Removal of chemical oxygen demand and sulfate in batch reactor by using anaerobic haloalkaphilic bacteria

Haloalkaliphiles was considered as an ideal choice in biological treatments for alkaline wastewaters that contain toxic residues from industrial processes. They normally activated in a medium with high salinity rate of cations (Na+, K+), anions (Cl-, CO3-2, HCO3-, SO4-2), and high pH ranging from 9-10. These microorganisms are normally implemented in anaerobic treatments on wastewater after determination and isolation of alkaliphilic bacterial under several operating conditions. In this thesis, the reductions of sulfate and organic matter have been studied under high salinity and alkalinity medium, using anaerobic Haloalkaphilic microorganisms, isolated from "Van Lake" Turkey. Several types of parameters have been examined including pH, COD, TOC, and identifying microbial species. The of the medium broth for haloalkaliphilic bacteria was at 9.74. In addition to, in the different salt concentration and alkalinity (5 g/L NaCl, 15 g/L NaHCO3, and 10 g/L Na2CO3 and in the different carbon sources (5 g/L acetate, and 2.5 ml/L ethanol) at 30oC were considered the optimum condition. As a result, it was determined that haloalkaliphilic bacteria could be used for COD and sulfate removal in biotechnological studies and anaerobic systems.