Water quality. Test for inhibition of oxygen consumption by activated sludge for carbonaceous and ammonium oxidation Ingestion-build-47182 BS 7121-2-1 has been updated

BS 7121-2-1 has been updated by experts to bring it up to date with technological developments

BS 3907-2 is the second part of the BS 3907 series that discusses the determination of iron in magnesium alloys using the phenanthroline method for the analysis of magnesium and magnesium alloys

Repair process

Hydraulic lifts

Water quality. Test for inhibition of oxygen consumption by activated sludge for carbonaceous and ammonium oxidation Ingestion-build-47182 BS 7121-2-1 has been updated1 Scope This International Standard specifies a method for assessing the inhibitory effect of a test material on the oxygen consumption of activated sludge microorganisms. This method is intended to represent the conditions in biological waste water treatment plants. It gives information on inhibitory or stimulatory effects after a short exposure (usually 30 min up to 180 min or even more) of the test material on activated sludge microorganisms. This