| What quality of water is produced? With
sewage treatment, water quality is defined by the level of
three forms of pollutants that are present in the water exiting
a treatment plant. The three pollutants are
1. BOD – Biological Oxygen Demand (a measure of
the biological pollutant load)
2. SS – Suspended Solids (small particles
of waste matter)
3. Ammonia – (Ammonia is the chemical that creates
urine odour)
The better a treatment plant’s performance,
the lower level of these pollutants, expressed
in milligrams per litre – The p6 Biotec
for example has been certified to deliver (in
normal domestic situations) an effluent quality
of 20mg/l BOD, 30mg/l SS and 20mg/l ammonia, expressed
as 20:30:20.
These are exceptional high levels of quality, falling well
within the common standards demanded by the environment agencies.
It is important to bear in mind that discharged water from
any plant is not suitable for consumption or washing but a
sample will have a high level of visual clarity.
|
