Biochemical oxygen demand determn. - by oxygenation of sewage mixed with recycled activated sludge

摘要: The biochemical oxygen demand (BOD) in aeration tanks of biological sewage treatment plants is determined by placing a certain quantity sewage-activated sludge mixt. reactor vessel with an overflow. Oxygen or air are passed through until content has been reacted, and recycled continuously stirred into the vessel. BOD finally measured. This requires only simple easily handled apparatus; it furnishes accurate results within short time all plants.