Products >> Waste Water Treatment >> Anaerobic Treatment
Up-Flow Anaerobic Sludge Blanket Reactor (UASBR):-
Introduction:-
Up-flow Anaerobic Sludge Blanket (UASB) is the most widely used high rate anaerobic
system for anaerobic sewage treatment.
Working Principle:-
The influent is introduced at the bottom. It passes through blanket of the sludge
before leaving the reactor. The sludge blanket mainly consists of inorganic particle
with anaerobic bio-mass grown around it. Sludge blanket acts as a filter and helps
in removing suspended solids. COD reduction takes by substrate reduction by bio-mass.
Primary sedimentation is not required prior to UASB as inorganic particles itself
are used as media in blanket formation. The treated wastewater is collected at the
top of reactor. Bio-gas produced during the degradation is collected at top.
Applications:-
- Biological treatment of wastewater with low to very high strength of
wastewater
- Sewage treatment for medium to large towns/ cities.
- Treatment of distillery spent wash / pulp mill black liquor.
Advantages:-
- No energy requirement for aeration or mixing .
- Energy production by means of biogas.
- Low cost of operation and maintenance.
- The energy requirement in the UASB reactor is very low.
- UASB system generates energy in the form of bio gas which can be used
for the production of electricity and which can make UASB plants self sustaining
for power requirement.
- This system reduces the space requirement, which is a big advantage
for developing cities.
- The production of excess sludge in a UASB reactor is very low. This
reduces the load on the sludge treatment system. However, the sludge from UASB plant
is very stabilized and can be used as manure.
- Final polishing pond can be used for fish culture, which can be source
of revenue.