How to recognise the sulfur bacteria who make a bad smell
like H2S from the waste ?
The simplest way to detect these bacteria is: use your
nose. The human nose is very sensitive to the smell of
H2S and can detect it at very low levels. But i guess
your question is: which bacteria are producing these
gases? In order to answer that you'd have to culture
the bacteria present in the waste, separate and select
the different species to purity, and then detect which
ones thrive on sulphurous compounds. There are
classical biochemical tests to do that. Most of these
are based on the production with H2S that will form a
black deposit in the presence of lead (PbS).
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Update: June 2012