Unitech Laundry
(& Dye-House) Wastewater Treatment
System (ULWTS)
According
to the EPA, laundry facilities in
the United States have the second
highest use of water in the commercial
/ industrial marketplace, and there
has been no real effort to address
this problem. In order for a company
to enter into the laundry business,
the company would need to invest a
minimum of $100,000 deposit to meet
local governmental guidelines for
the amount of gray water that is produced.
The Unitech Laundry Wastewater Treatment
System (ULWTS) purifies the gray water
to actually exceed government standards.
Therefore, by installing the ULWTS,
a laundry facility will not be burdened
with hefty government fines that are
normally attributed to companies producing
and discharging large amounts of gray
water. Not only will the ULWTS eliminate
the governmental wastewater discharge
restrictions due to its ability to
purify the gray water prior to discharge,
but it will also recycle up to 60%
of the treated water; and thus, be
reused in the laundry cleaning cycle.
Due to high water bills as well as
government regulatory fees regarding
wastewater disposal, the ULWTS can
save companies over 50% on their water
and disposal costs.
The
ULWTS can be applied to any commercial
or industrial application that is
water intensive. In other words, Unitech
Water Systems Corporation can utilize
the same technology for dye-house
facilities (as shown below), paint-manufacturing
facilities, food-processing facilities,
and glass-manufacturing facilities.
Overall
View of System
View
of the left side
View
from the top
Comparison
of gray water and treated water
The following
is a brief overview of the ULWTS features
and the method by which the
ULWTS purifies the gray water for reuse:
1.
Clarifier Unit - Wastewater
(i.e. sediment and sludge) in the
clarifier unit is fed into the drum
screen filtration unit by way of a
sump pump, which is installed inside
the clarifier unit itself.
2.
Drum Screen Filter (DSF) Unit
- Wastewater enters the DSF Unit which
removes solids rapidly. This DSF Unit
is designed for special filtration
and is made entirely of stainless
steel. It is designed to automatically
remove solids via the internally-mounted
coils. It also has a self-cleaning
function.
This specially-designed drum screen
unit (shown below) reduces the amount
of chemicals required in the Total
Reactor System (see 3.), thus increasing
the overall effectiveness of the treatment
process. The drum screen unit is designed
to remove all forms of solid waste
prior to further treatment.
3. Total Reactor
System -- consists of four reactors
The first reactor checks the
condition of the wastewater using
a pH sensor and injects special
chemicals that begin the breakdown
and removal of the color from
the wastewater
while increasing the pH simultaneously.
The second reactor injects
another special chemical and further
increases the pH.
This reactor continues to further
separate the color from the wastewater.
The third reactor injects a
special chemical that now causes
the color particles to form as
flocs.
The fourth and last reactor
collects and stabilizes the flocs.
Once the wastewater has flowed through
all four reactors, the color is completely
removed, over 95% of the TSS is removed,
and over 85% of the BOD is reduced.
Also, T-P is reduced to over 90% and
T-N is reduced to over 65%. The treated
wastewater now exceeds government-regulatory
requirements for wastewater discharge.
The Total Reactor System is connected
using four chemical tanks and eight
dosing pumps (shown below), four of
which are on standby. The dosing pumps
control and operate specially designed
agitator systems.
4.
Unitech Air Floatation (UAF) System
- The UAF System is designed to completely
remove the flocs that have formed.
Unitech uses a unique air-dissolving
system that produces a tremendous
amount of dissolved air while maintaining
a very small micron-sized air bubble.
The UAF system removes suspended solids,
oil and grease, heavy metals, and
it considerably reduces the BOD, COD,
and VOCs.
The air-dissolving system is designed
as a recirculation loop that is compactly
skid-mounted under the UAF System
itself (shown below). Included is
a scrapper unit that removes the sludge
from the surface and feeds it through
a filter press unit for solid consolidation
and eventual removal. The partially-treated
wastewater is then fed through a pre-coat
unit for final treatment.
5.
Filter Press Unit - Liquid
slurry containing suspended solids
is pumped into the feed inlet of the
filter press unit (shown below) using
a double diaphragm pump and is treated
by a high-pressure dehydration process.
The filter press unit has a single
switch that controls a hydraulic cylinder.
The space-saving design allows the
cylinder to be flipped up and out
of the way when not in use. One single
air connection can operate the hydraulics
and the diaphragm pump. As pressure
is exerted via the diaphragm pump,
the solids separate from the liquid.
Eventually, a filter cake forms that
is processed through the cake handling
unit
6.
Pre-Coat Unit - The pre-coat
unit (shown below) is designed to
eliminate N-Hexane and all types of
ABS. Over 99% of the TSS is removed
in this final treatment of the wastewater.
The treated water is now ready and
safe to be discharged or reused
7.
Additional Components and Features
Piping and Fittings -Stainless
steel, PVC Sch 40, and PVC Sch
80 pipes are used.
Level Control System - Automation
of pumps and motors.
Heavy Duty Steel Beam and
Steel Frame Ladder - The system
is safe, using a heavy-duty
beam
installed on 4-inch thick
concrete. A safety device is
also installed when maintenance
is performed.
Electrical Control System
(shown below) - Fully-automated
and user-friendly PLC touch-screen
