The utility and limitations of bubble column type aerator for supplement of septic tank

Abstract

Septic tank is equipment for sewage treatment using microorganisms. The purpose of this investigation is to establish the treatment processes for highly concentrated wastewater including oil by the combination of septic tank and auxiliary equipment (bubble columns reactor). We evaluated and emphasized the performance of auxiliary equipment for wastewater treatment. Experimental data obtained from COD-Cr and BOD showed the degradation of carbon source by our bubble columns reactor.In addition, artificial waste water including oil (more than 500 mg/L) was not able to degraded, scum floated in equipment. As a result, it can be concluded that septic tank with auxiliary equipment needs detailed study to upgrade its performance for treating wastewater including oil.