Cooling Tower Circulation
Water Treatment System
IGADEN CO., LTD.

Benefits• Eliminates scale contained in the circulation water in the cooling
tower, as well as preventing scale buildup inside piping (prevents
piping from getting clogged by eliminating scale).
• Improves pump efficiency to conserve power and control CO2discharge.
• Prevents red rust on piping and equipment.
• Reduces water use and wastewater discharge to save on water
costs.
• Provides a measure for COD of wastewater by using no chemicals.
• Controls algae and water-bloom.
• Helps de-sliming.
• Eliminates Legionella.

Effects of the Cooling Tower Circulation Water Treatment System
As the temperature in the cooling tower rises to a degree optimal for bacteria growth, scale within the piping
accumulates due to algae, bacteria, and concentrated circulation water, causing blockage in the heat exchanger.
This in turn leads to issues such as decrease in efficiency in heat exchange and growth of Legionella nesting in thescale inside the piping. (Mold fungi appear if regular cleaning is not well maintained.)
Chemical products have traditionally been used to deal with these issues. However, as the circulation water is
evaporated and concentrated by the heat of evaporation, chemical component discharge (COD) during automatic
overblow (blowdown) has been a recent concern. Thus, the maintenance cost is high.
The chemical-free water treatment system “MICRO WATER SYSTEM” (patented) reduces maintenance, andoperates while conserving energy at low costs. It can also separate and collect the scale in the circulation water,
control saprophytic contamination, kill algae, and conserve water. Especially, this system has consistently beendelivered to many ISO 14001 certified companies, garnering attention.

Consumables / Inspection and MaintenanceConsumables:year.

The consumable electrode plates need to be replaced every six months or one

Inspection and Maintenance:

The system operates automatically, but periodic inspections are necessary.

Installation Cost of the Circulation Water Treatment System
System installation to the cooling tower will be estimated based on the environment of the installation site.
• Consumable Electrode:

12,000 yen/month• 5-Year Lease:

56,000 yen/month• Optional Maintenance Contract:

30,000 yen/service•Electricity:

4,500 yen/month

Flowchart

Treated Water

Treatment of Circulation Water• Separates and collects scale• Controls and/or eliminates
saprophytic contamination• Conserves water

Cooling Tower
Circulation Water

Cooling Tower

Cooling Tower Circulation Water Treatment System

Cooling Tower Circulation Water Treatment System: Installed Image

Inside the Cooling Tower: Images Before and After Installation

BEFORE (Chemically Fed)AFTER Installation of Cooling Tower
Circulation Water Treatment System

Cost Reduction Effect by the Introduction of the System
This environment-friendly, chemical-free system for water quality improvement can assist in major cost savings.

Example: 12-Month Lease with Package Purchase12-Month Lease
ChemicalTreatment:
薬剤処理10万円
100,000 yen(Ten Thousand Yen)

2400
2000

ChemicalTreatment:
薬剤処理20万円
200,000 yen

1600
1200

ChemicalTreatment:
薬剤処理30万円
300,000 yen

800

ChemicalTreatment:
薬剤処理40万円
400,000 yen

400
0System装置設置
Installation

1
1年

year

2
2年

years

3
3年years

4
4年

years

5
5年

ﾏｲｸﾛｳｵｰﾀｰｼｽﾃﾑ
MicroWater Systemyears(Years of Use)

If the current cost is 200,000 yen/month, the cost of the system can be recovered in about 1.3 years.
Condition: If the cooling tower operates continuously for the year, a 12-month implementation of the water
quality improvement system is required. After the lease term matures and the title of the systems istransferred, the only costs will be for electricity and consumable electrode plates.
* The 12-month lease comparison chart above includes the fees for electricity, consumable electrode plates,and system construction.

Example: 60-Month Lease of This System(Ten Thousand Yen)

60-Month Lease

1,000
Chemical
薬剤処理10万円
Treatment: 100,000 yen
ChemicalTreatment: 200,000 yen
薬剤処理20万円
ChemicalTreatment: 300,000 yen
薬剤処理30万円

500

ChemicalTreatment: 400,000 yen
薬剤処理40万円
MicroWater
System システム
マイクロウォーター

0System
装置設置
Installation

1

1年year2
2年years3
3年years

4
4年years

5
5年years(Years of Use)

The cost of the system can be recovered in about one year if the current cost is 200,000 yen/month, andin two years if the current cost is 150,000 yen/month.
Condition: If the cooling tower operates continuously for half the year, a 60-month implementation of the water
quality improvement system is required. After the lease term matures and the title of the systems istransferred, the only costs will be for electricity and consumable electrode plates.
* The 60-month lease comparison chart above includes the fees for electricity, consumable electrode plates,and system construction.

Effect of Cost Reduction by Conserving Water up to 85%(Ten Thousand Yen)

Comparison of the Unit Price of Industrial Water by Region
400

TokaiRegion
東海地域
Tokai:
Water Saved w/System
東海地域で装置を取り付け節水

300

TohokuRegion東北地域

200

Tohoku:Water Saved w/System
東北地域で装置を取り付け節水Kanto
Region
関東地域

100

Kanto:
Water Saved w/System
関東地域で装置を取り付け節水

0

1 year

2 years

1年目

2年目

3 years

3年目

4 years

4年目

5 years

5年目(Years of Use)

Operating a cooling tower while freely discharging industrial water without treating the cooling tower
circulation water using chemicals or other means appears to cost nothing. However, the fees forindustrial water supply and wastewater treatment will be a huge waste of money.
The operating costs before the installation of a water quality improvement system (20 t/day) (accumulated for ayear) are compared with those after the installation on the assumption that the system operates continuously
year-round and that the maximum rate of water conservation to be expected is 85%/day (refilled 15%/day).

(Ten Thousand Yen)

Comparison of Wastewater Treatment Fees by Region
1,000
Kanto
Region
関東地域

750

Kanto:
Water Saved w/System
関東地域で装置を取り付け節水

500

KansaiRegion関西地域
Kansai:
Water Saved w/System
関西地域で装置を取り付けて節水

250
0TokaiRegion東海地域
1 year

1年目

2 years

2年目

3 years

3年目

4 years

4年目

5 years

5年目

Tokai:
Water Saved w/System
東海地域で装置を取り付けて節水(Years of Use)

Although the extent of savings differs depending on the region, cost-savings can be enhanced throughwater conservation.
The lease fee includes various costs for the work we perform on our own (consumable electrode plates,standard installation construction, and warranty for spontaneous failure of the system).
Fees for periodic inspections and cleaning are not included.
A maximum 85% water conservation can be achieved in the following fashion: Industrial and/or undergroundwater of approximately 30 to 150 µs/cm (in electric conductivity) is concentrated by the heat of evaporation,rising to approximately 1,000 µs/cm. With 1,000 µs/cm established as the maximum concentration value, theelectric conductivity is forcibly lowered to approximately 800 µs/cm by refilling with automatic overflow. Water
conservation can be achieved by repeating this operation (Any value can be established as the electricconductivity).
 Manufactured and Distributed by: Dealership:

IGADEN CO., LTD.
78-4 Shinoyama, Joso City, Ibaraki Prefecture
TEL: +81-297-42-6372 FAX: +81-297-42-8335
URL: http://www.igaden.com/
E-mail: idj@igaden.com
Specifications and appearance are subject to change without prior notice.
U.S. Patent No. 6,706,168B2 / Japanese Patent No. 3635349 / MICRO WATER SYSTEM is the registered trademark of Igaden Co., Ltd.

As of april 2014