Biological unit processes

2. Biological unit processes: Biological unit process makes use of microbes for
removal of mainly dissolved organic matter from the
wastewater
 The biological unit processes are mainly two types
i. Aerobic biological unit process
i. Anaerobic biological unit process

3. 1. Aerobic biological unit process:The treatment which
is carried out by microorganism in the presence of
oxygen.
2. Anaerobic biological unit process :The treatment
which is carried out by aerobes in the absence of
oxygen.

4. Aerobic processesi. Activated sludge process
ii. Trickling filters
iii. Aerobic stabilisation ponds
iv. Aerated lagoons

6. Anaerobic processes Anaerobic waste treatment involves the decomposition
of organic/inorganic matter in absence of molecular
oxygen. These are:
i. Anaerobic sludge digestion
ii. Anaerobic contact processes
iii. Anaerobic filters
iv. Anaerobic lagoons or ponds

8. Thank you