were determined according to the standard methods in a WTW CR 3000 thermoreactor and a WTW MPM 3000 photometer for COD while a WTW Inolab 740 was used to measure the dissolved oxygen for BOD5
were determined according to the standard methods in a WTW CR 3000 thermoreactor and a WTW MPM 3000 photometer for COD while a WTW Inolab 740 was used to measure the dissolved oxygen for BOD5