Laboratory Analysis - Zahn Wellens / EMPA Readily Biodegradable Assessment
Aqua Enviro utilise three main techniques for assessing feedstocks for aerobic treatment. With these being carbonaceous and nitrification inhibition testing, Zahn Wellens / EMPA RBCOD assessment and laboratory trials using sequence batch reactors.
The Zahn Wellens test is usually the 2nd stage of assessment, comprising of a batch test whereby a known quantity of test material is added to a continually mixed and aerated vessel, containing seed sludge from a suitable activated sludge process. COD degradation is recorded over the 28 day test period.
A report of results will be produced which will show:-
1kg or 1L of test material is required for the testing.
Synonyms / keywords: OECD 302B, EMPA, Zahn Wellens, RBCOD, biodegradable chemical oxygen demand, Aerobic biodegradability, aerobic biomass treatability, activated sludge, % COD degradation
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