Wastewater project awarded

Wastewater project awarded

Cake dewatering reduces transport costs Wastewater project awarded Water management EarthTech company Inc, headquartered in Long Beach, California...

161KB Sizes 4 Downloads 181 Views

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