comparison of a modified a2o bioreactor, processed through sbr operation method with a conventional a2o bioreactor

Biological wastewater treatment methods have been progressed significantly during recent years# a2o and sbr are two kinds of processes which are used separately in wastewater treatment industry# both methods have deficiencies in operation specially in denitrification, which is an important item in wastewater treatment the aim of this study was to combine both methods and present a designed modified a2o bioreactor which was operated through sbr method# usage of pulsator clarifier was an innovation in order to provide better floc stabilizion# water environment research foundation (werf) design method was selected for calculations and designs# extracted results from the designed bioreactor indicate priority of shorter pulses comparing to longer ones# also modified bioreactor had better efficiency in nitrate removal and decant volume unlike mlss toleration#