Cake dewatering reduces transport costs
Wastewater project awarded Water management EarthTech
company
Inc, headquartered
in Long Beach, California, USA, is to provide design, build and operate services for the construction
of a new
water filtration
treatment
plant
in the city of Glen Falls, New York, as well as upgrading the city s wastcwater
treatment
plant. The company will operate and maintain both plants for 20 years. The contract
is valued at
US$65 million over this time period. The wastcwatcr treatment
plant currrntly
has
an average daily inflow of 2 1 megalitres. The new \vatcr
Following the installation
treatment
Watromat”
plant will have a
of a
sludge drying unit
\vaste air, as \vell as dust.
not contain organics,
Instead it installed a Watromat
therefore
the production
design capacity of 26 mega-
from Watropur AC; of Switzer-
6000s
litres/day. The new facility will
land, TaiLvancsc printed circuit
sludge drying unit.
incorporate
manufacturer,
two adsorption
clarifier units, four filters,
Electronic
process pumps for filtered
significantly
water, backwash and equalisation,
chemical feed
systems, below grade tanks and ancillary equipment.
Gold Circuit
tunnel
Watropur
The system operates bj
Ltd, ~1as able to
transporting
incrcasc the drv
to
process. say-s the total
drying system only requires
filter cakes from
280 kWh/t of energy,
the filtrr press \-ia a feeding
compared
solids content of its filter
belt conveyer to a 10 m long
system, which can use up to
cakes, and thcrcbv reduce its
stainless steel chain convevor
720 kWh/t of energy to
transportation
\vith perforated
evaporate one tonne of water.
costs.
Previously, Gold Circuit
Earth Tech will also install
continuous
and
can be returned
drying
copper-hydroxide-containing
moved slowly through an air
standard and customised
filter cakes with a plate frame
canal. Dry air is then
models, and is suitable for use
and water audits to improve
filter press. Approximately
continuously
the efficiency
tonnes of rake \vas produced
the tunnel against the direction
automotive,
finishing, biological
water meters teak detection
of the city’s
water distribution EarthTech
system.
is an intcr-
national provider of lvater
its
The Watromat
system is available in both
and implement
dcwatcrcd
the chain conveyor, Lvhich is loaded up \vith filter cake, is
4 100 residential
Electronics
plates. There,
to a thcrmat drying
10
blown through
chemical,
i.e.
metal
daily, but it only had a dried
of movement
solids content of 30%. It was
conveyer. The resulting
treatment,
important
moisture
the company, the system has an
to recover the
of the chain
in a variety of industries,
laden air is rcturncd
operating
waste
etc. According life of
to
15 year, and
copper in the cakes. However,
to the air gcncrator
this meant the company had to
dried before being blown back
the initial investment
employs 7000 people in more
transport
into the tunnel. The system, ,
USS 2 30 000 can be recouped within two years. Over 400
management
and engineering
and environmental
services.
It
them to the USA for
where it is
than 150 offices located around
further processing.
Gold
therefore,
the world. It is part ofTvco
Circuit Electronics
realised
loop, \vhich guards against
Watromat
Flow Control,
that it could save up to 70 %
emissions into the surrounding
currently
in operation
business unit of diversified
of the exploitation
environment.
countries
throughout
manufacturer,
transportation
tvhich is a major Taco , Inter-
national Ltd
and
costs, if the dry
solids content of the cakes was increased to 90%.
Forfurther mfbrmation contact:
After consideration,
the
operates in a closed
At the end of the
conveyor the dried sludge
costs of
drying systems are in Asia, as
well as in the USA and Europe.
cakes fall into a scrc\v conveyer, where they are auto-
For more lnformatmn
matically bagged ready for
LKltropur AG,
Earth Tkch, 100 WEstBroadway,
company decided against using
transportation.
Suite 240, Long Beach, C.4 90802,
a thermal drying mcthotl
Watropur,
USA.
because of the perceived
jr,]: + J 562 9i J 2OOO; i Fax: +J 562 9
energy costs, as kvcll as the
the resulting
production
which amounts to
E-mall:
[email protected];
E-mail:
[email protected]
loaded condcnsatc,
approxlmatcly
web.ehsite:WWW.wtropur.com
10
June 2001
high
of an organicaltpodorous
According
to
contact:
this step is abso-
lutclv dust-free.
Furthermore,
condcnsatc, 6 m’/day, does
Schlammtrocknungstechn~k, Eichrun, CH-3800 Jnterloken, Swxzerlond; Tel +4J 33 8234757; Fax: +4J 33 8233758:
Filtration+Separation