Orient Water Technologies
CASE STUDY
WASTE WATER TREATMENT PLANT
For
Hilal Foods (Pvt.) Ltd.
Capacity: (606 m3/day)
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4
Introduction:
The food industry is a complex,
global collective of diverse
businesses that supply much of
the food and food energy
consumed
by
the
world
population. Only subsistence
farmers , those who survive on
what they grow, can be
considered outside of the scope of
the modern food industry.
Technical Characteristics:
The Plant’s average capacity is 606
m3/day. The treatment process is capable
of producing product of following
characteristics:
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General Information:
The engineered waste water treatment
plant consisted of the following:
� Screening
� Equalization
� Chemical treatment
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Scope of Work:
� Biological treatment
� Sludge dewatering
The contract included the
complete of equipment, design,
engineering,
manufacturing,
supply, installation, Civil work,
Testing
and
plant
commissioning.
� Screening
As the process water has solid particles,
screening is the first unit used to filter
wastewater in treatment plants to hold
those particles. The main purpose of
screens is to remove large objects from
wastewater which may damage pumps
and equipment.
� Equalization
� Biological treatment
� Sludge dewatering
Wastewater is taken into
equalization tank for hydraulic
and organic equalization and
homogenization. Mixing is done
via blower. There are pumps in
the equalization tank. One of
them is always standby as
reserve while the other pumps
are on duty. Those pumps feed
the actual wastewater treatment
plant in equal flow rate.
The system which is used for the
biological
treatment
is
SEQUENCING BATCH
REACTOR system. The most
important property of the system is
to be resistant of the bacterium to
the shock loadings. Also, the easy
control of the MLSS setting and the
easy change of the operation
parameters are the other important
points.
Sludge
� Chemical treatment
The necessary oxygen for Biological
Chemical treatment consists of
coagulation + flocculation +
sedimentation units. First of all,
wastewater is taken into
coagulation tank. In this process
coagulant
is
dosed
into
coagulation tank. Also lime is
dosed into coagulation
tank for pH adjusting. After that
polyelectrolyte is dosed for
flocculation.
treatment is provided by the blower + The
dewatering
sludge conditioning. Then sludge is
pumped into filter press pump. The
sludge cake is taken away as solid waste
and filtrate water from filter press is
reverted into equalization tank.
� Plant Control:
plant
is
fully
the complete mixture is provided at addition
the
After
a
to
controlled
by
controller
.In
PLC,
various
multiple instrumentations are located at different
biochemical reaction, the organic locations in plant to enable the operator
materials inside the wastewater part and engineer to properly monitor and
by microorganisms named the active analyze the plant performance. The
sludge and then the wastewater is monitoring system is rated for hazardous
taken
into
sedimentation
phase. area and is totally reliable unit installed
Following the sedimentation tank, the in a dedicated control room.
After this unit, wastewater is
wastewater which is collected by the
taken into sedimentation tank.
discharge pump, is filtrated. Then
Chemically
treated
water
overflows the weirs and is taken
into
biological
treatment
system. In the mean time the
settled sludge is taken away
from the sedimentation tank
into the sludge unit. There are 2
by pass valves to take the
wastewater to neutralization
unit directly.
to
Polyelectrolyte dosing will be used for
logic
basin.
necessary
increase the solid content in the sludge.
diffuser system and at the same time programmable
the
is
wastewater is discharged. And the
residual sludge is pumped into sludge
tank. And the residual sludge is taken
by truck or pumped into sludge
dewatering
unit.
After
wastewater is discharged
that
Orient Water Technologies
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Conclusion:
As a result the waste water treatment plant by Orient Water Technologies managed to improve the performance of
Hilal Foods (Pvt.) Ltd. , whilst meeting the local environmental regulation
Schematic Flow Diagram