• Sewage = 99.9% H2O + 0.1% impurities.
Several different methods
of S.T. are used depending on the
quality of the output effluent
that is
required & $$.
• Environmental
Engineers
carry
out the design &
improvements to
plant processes.
• QC uses tests
for BOD, TN, TP,
suspended solids and
microbiological tests.