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The Facts on Domestic Hot Water Treatment Technologies:BACK)
The following chart compares different water treatment technologies for domestic hot water applications found in healthcare facilities, hotels, office buildings and nursing homes.
 
 
 

Chlorine

Cl2

Chlorine Dioxide
ClO2
Ozone
UV
Heat
Eradication
Copper Silver
Ionization
Cu+2/Ag+ by
AquaLyse®
Biofilm Penetration
No (not 100%)
Yes
No
No
No (not 100%)
Yes at 100%
Time required for system saturation
time is proportional to concentration levels and distal water bleeding.
Over 17 months
N/A
N/A
time is proportional to maintained temperature and distal water bleeding.

less than 45 days

No distal bleeding requirements.

Systemic Biocide Properties (does it treat all of the water system including distal low flow areas and dead legs?)
No
No
No
No
No
Yes
Dangerous byproducts or side effects:

Yes

THM
carcinogenic

Yes

Chlorites
Chlorates
Halogens

Yes

perchlorate and bromate

No
Yes (Scalding)
No
             
 
 

Chlorine

Cl2

Chlorine Dioxide
ClO2

Ozone

O3

UV

Heat
Eradication

High Temperature

Copper Silver
Ionization
Cu+2/Ag+ by
AquaLyse®
Corrosive facts when in domestic hot water systems.

Yes - especially when introduces in domestic hot water systems.

Yes - Less than regular Cl2 Yes - it is an oxidant yet solubility is more of an issue with this technology when used in domestic hot water systems. No - a U.V. light causes genetic mutations and thus stops the microbiological reproductive process. It does not treat the biofilm where bacteria is normally protected and thrive. Yes - can accelerate the corrosion process.

No - copper silver ionization does not corrode (oxydate) by any means.

Note: some limitations with Galvanized steel pipes (Zinc covered steel - Zn) Only AquaLyse has a solution to avoid this.

Operational temperatures (treatment site)

No limitations.

50 to 86 F (10 to 30C) Colder water will raise the resistance in the required cassette(s). Warmer water will accelerate the cells degradation. Not suitable for domestic hot water system. Not applicable Not applicable

No limitations. Excellent for cold and/or hot water applications.

 

Required Operational water pressure:

Not applicable

40PSI. Not applicable Not applicable Not applicable

AquaLyse work in any normal water pressures from 1PSI to 330 PSI and more.

 

 
 

Chlorine

Cl2

Chlorine Dioxide
ClO2

Ozone

O3

UV

Heat
Eradication

High Temperature

Copper Silver
Ionization
Cu+2/Ag+ by
AquaLyse®
Startup technology cost for application using between 25,000 GPD and 50,000 GPD of domestic hot water: (on average a healthcare facility with 400 beds use 50,000 GPD max.)

No direct startup cost other than logistical organization.

$25,000 to $30,000 per facility. Not suitable for domestic hot water system. Not suitable for domestic hot water system. No direct startup cost other than logistical organization.

$47,000 to $56,000 per facility. (multiple unit discount can save up to 40% in startup costs)

 

Yearly maintenance and replacement / replenishment costs.

$40,000 to $70,000 plus approximately $175,000 for ongoing maintenance labor and water testing protocols.

Must be re-applied ever 3 to 6 weeks in combination with distal water bleeds.

$3,000 to $6,000 for the Sodium Chlorite (NaCLO2) drums. Then $2,000 to $4,000 per year for cartridges. (you need both for this to work)

Average $7,500 per year in on-going chemical and cartridge costs alone.

Not suitable for domestic hot water system. Ozone will not stay soluble. Not suitable for domestic hot water system.

Must be re-applied ever 3 to 6 weeks in combination with distal water bleeds.

Aprox $225,000 for ongoing maintenance , labor, energy usage and water monitoring. Provokes accelerated corrosion.

$1,775 to $3,475 per year for all replacement industrial chamber cells and between 8 to 16 lbs of electrodes. (the whole units are interchanged)

No distal point bleeds are required, temperatures can be set at 125F without worry and lower energy requirements.

Average price on a 10 year period to treat between 25,000 and 50,000 GPD. (aprox 100M3 and 200M3 of daily domestic hot water usage) Between $500,000 and $2,000,000 with sever corrosion damage to the water distribution system. Between $100,000 and $150,000 (this technology takes over 17 months for total systemic saturation. Not suitable for domestic hot water system. Not suitable for domestic hot water system. Between $500,000 and $2,000,000 with accelerated corrosion damage to the water distribution system.

Between $64,750 and $90,750 per facility and with total systemic saturation period in less than 45 days. (ClO2 takes over 17 months)

(approximately 40% less than ClO2)

 

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