Xu ly nuoc cong nghe Unitank

Water solutions
UNITANK
®
- Wastewater treatment
Water is a scarse element which is nevertheles used
extensively in almost any industry and municipality
around the world. Making sure used water or
wastewater is treated before released into the
environment again is therefore a key-process for every
self-respecting company and authority.
Principle
The new 3rd generation UNITANK
®
is a very performing
and modern wastewater treatment system based on widely-
known biological treatment processes:
UNITANK
®
multitrain - Brasilia municipality - Brazil.
UNITANK
®
multistage - Cam Ranh sugar refinery - Vietnam.
BOD
CO
2
+ H
2
0
Biomass
O
2

sludge stabilisation
and storage tank
thickener
sludge dewatering
grit / sand trap
UNITANK
®
basic
aeration-sedimentation
effluent
air
to landfill
pump pit
fine screen
container
excess
biosolids
screenings
container
sand
wastewater
air
TSS
CO
2
+ H
2
0
Biomass
O

2
O
2
NH
4
+
NO
x
-
N
2
BOD
BOD
Biomass
P
Removal of suspended
and settleable solids through
oxidation and settling.
Enhanced absorption of
phosphorus into the biomass
Absorption and oxidation
of dissolved and suspended
organic impurities
Conversion of environment
unfriendly ammonia into
nitrogen gas
Applications
UNITANK
®
is used for industrial and municipal wastewater

treatment. It can be used as a "stand alone" installation or
in combination with other UNITANK
®
configurations for a
wide range of wastewater types.
It's extremely suitable for the treatment of most organic
wastewaters from :
· the food industry such as breweries, softdrinks,
sugar refineries, dairies, …
· textile industry
· chemical industry
· petrochemical industry
· pharmaceutical industry
It goes without saying that 3rd generation UNITANK
®
can
be perfectly designed for any type and amount of domestic
sewage water.
Process Description
The UNITANK
®
BASIC configuartion consists of one reactor
divided into three compartments. These are hydraulically
connected by an opening in the common connecting walls.
Each compartment is equipped with an aeration system. The
outer compartments also have an overflow system (SEOS)
for effluent discharge, meaning that each outer compartment
can serve either as aeration or sedimentation tank.
Wastewater can be fed into each compartment. Excess
biosolids are pumped from the central compartment

towards the biosolids conditionioning tank.
UNITANK
®
BASIC operates according to a simple cycle
consisting of two main phases and two short intermediate
phases in sequence.
A typical feature is the absence of a separate sedimentation
tank with scraper and the absence of a sludge recirculation.
UNITANK
®
is a perfect match of the classic "fully mixed"
activated sludge systems and the discontinuous working
"batch" systems (SBR), taking the best of both technologies.
UNITANK
®
can be built in a rectangular as well as in a
circular shape.The latter version is either available in
concrete or in steel.
The UNITANK
®
ADVANCED configuration is specially
designed for advanced biological removal of nitrogen and/or
phosphorus The concept has one or two extra compartments
(anoxic and/or anaerobic) and a system for internal
recirculation of mixed liquor.
As for UNITANK
®
BASIC, the UNITANK
®
ADVANCED

operates according to a cycle of two main phases and two
short intermediate phases in sequence.
Features
· Advanced treatment, complying with strict effluent
requirements
· Very compact installation - easy to integrate into any
factory site
· Odour and noise free
· Fully automated, reliable and flexible operation
· Economical use of energy and chemicals
· Modular, easily extendable
· Basic concept, enabling quick design and construction
· Useful for a very wide range of wastewater types
· Very favourable price/quality ratio
www.keppelseghers.com Ì
MStore_1F_en_001_B
Ì Copyright, Keppel Seghers, 2006
FIRST MAINPHASE: 2 - 4 hours SECOND MAINPHASE: 2 - 4 hours
A
A
C
C
B
B
A
A
C
C
B
B

Influent
Effluent
Effluent
Influent
UNITANK
®
BASIC - Rectangular configuration - Pemex Refinery - Mexico.
UNITANK
®
ADVANCED - Circular configuration - Rousselot - Argentina.