Types and Comparison

   1st generation



Classification Chemical Weak acidity Hypochlorous Acid Water
Production - Produce the chemical in the factory
- Dilute the chemical with water
- Dilute the undiluted solution of the chemical with water to produce at a certain ratio by using a device such metering pump as the disinfectant
This is an automatic alternative to the manual dillution.
Advantages - The existing chemical are generalized.
- No initial investment. Purchase of the chemical is only required.
- Easy to purchase
- Use the existing chemical
- No convenience from chemical dilution
- Dilute the chemical with water at a certain concentration
- Successively dilute a large amount at a time
Producible This is an automatic alternative to the manual dilution.
Disadvantages - The dilution ratio is not correct as it is manually carried out and therefore there is a doubt in reliance of the sterilizing capability
- There is an inconvenience of having to select the chemicals according to the types of bacteria
The strong chemical may affect the workers
- There are many chemicals environmentally difficult to be drained
- The dilution process takes lots of time and a loss occurs in the work time
- The chemical disinfectant has a high persistence.
- It is difficult to use in a narrow space due to the strong smell
- The expense is high due to purchase of chemicals
- The expense for devices is higher than the process of simply diluting the chemical disinfectant with water - There are problems such as strong smell, influence to the human body, corrosion, decoloration, persistence and handling difficulty as ordinary chemical disinfectants are used
It needs to purchase the chemical disinfectants continually
Large amount of investment is required
Notes - It takes 4,500 KRW to dilute the sodium hypochlorite at 1: 300 rate to produce 1t (1,000 L ) of disinfectant
- Pact and Sold in a container
Permissions - The used chemical disinfectant must be one that is permitted by Korea Food & Chemical Administration - The used chemical disinfectant must be one that is permitted by Korea Food & Chemical Administration

   2nd generation : Hypochlorous Acid Water



Classification Strong acidity Hypochlorous Acid Water Weak acidity Hypochlorous Acid Water
Production - Separate the acid water from the alkaline water by supplying the electricity (+ and -) to the electrodes attached to each end of the electrolytic cell that contains the table salt and the membrane both electrodes. - When adding the diluted chlorine at both electrodes to the diluted hydrochloric acid tin the undivided electrolytic cell, at the both electrodes the chlorine (C12) is generated, which produce the weak acidity hypochlorous acid water
Advantages - No odor - Low production costs
-Suitable for agriculture
Disadvantages - The disinfection may have no effect depending on the ph concentration of the strong acidity water
- The expense for after-sales services and maintenance for the product is high
The method to use is difficult and complicated
- It could be spilled over and the workability is low
- The oxidizing power is strong, causing corrosion to steel and stainless steel
- It effects the human skin
When producing strong acidic water, the alkaline water is generated and water is wasted
The effect is lowered as soon as it contacts with an organic matter
- Electrode change is required
- It is repulsed by using the chlorine
- It has the properties of a chemical
Principle and specifications
Notes - Production cost is high
Permission - Check the permission requirement from Korea Food and Drug Administration and use i according to its intended use.

   Ozone Water



Classification Ozone water
Production - Blow ozone into the water or produce the water where ozone is contained in a large volume
1L water must include 1mg or more O3. The ozone concentration emitted from the machine must be 0.06 ppm or less (food additives)
Advantages - Metal corrosion is not caused
- O3 has no drug persistence
Principle and specifications
Disadvantages -The machine is expensive and difficult to manufacture
- If manufactured for large capacity, the machine will be huge
- Not widely used
When blowing the ozone into the water, it cannot resolve into the water and cause air pollution
- If used a long period of time, i may do harm to the human body
- Since the ozone is not easily resolved in the water, the disinfection power is weak
- Several minutes after production, the effect begins to be weak
- If used at a lower concentration, the disinfection effect is low
- There is a problem with the off ozone concentration generated when operating the machine
- Ozone has a strong oxidizing power, affecting the plastics and rubber
Notes - Currently the ozone water has no permission as a sterilizer /disinfectant from Korea Food and Drug Administration(KFDA) and should not sued for sanitary tools, devices and container and packing for disinfection.
If the ozone water is to be used for disinfection, the user should receive the permission from KFDA according to the Food Sanitation Act
Permission - Check the permission requirement from KFDA and use it according to its intended use

   Second generation : sodium hypochlorite generator



Classification Sodium Hypochlorite generator (resolve the table salt)
Production - If you supply electricity to the electrolytic cell which contains the plus and minus electrodes and high-construction saline solution, high concentration sodium hypochlorite is produced and this is diluted with water to generate the disinfectant at a certain concentration
Advantages - Use a machine to dilute with water to generate disinfectant
- Easy dilution
Principle and specifications
Disadvantages - A large amount of chlorine gas is generated from the produced high concentration sodium hypochlorite
- A strong smell is emitted during production
- Similar to the properties of the diluted chemicals
- Since the whole water is not electrolyzed, there is no properties of electrolytic disinfectant and active chlorine
- It has the same disadvantages that ordinary chemical disinfectants have
- There is few difference from the chemical dilution devices
Notes - This is similar to NaOClean. However if the production method of disinfectant is different, the gradients are different and has no difference from ordinary chemicals
Permission - Check the permission requirement from KFDA and use it according to its intended use
Notes - It has the same problems that the chemicals have

   Third generation : Electrolytic disinfectant



Classification Electrolytic disinfectant - NAOCLEAN (resolve the water)
Production - Electrolyze the tap water with a small amount of table salt in the undivided electrolytic cell that has plus and minus electrodes to generate the electrolytic disinfectant, at a consistent concentration, of which the main ingredient is the highly active sodium hypochlorite
Advantages - Water PH not changed and neutral, soft and easy to use
- Disinfectant water automatically generated at a certain concentration
- Mass production available, strong disinfection power in a short period time
- The disinfection power not weakening with time
- Produced as required, reducing the work time loss
- No second contamination, No chemical persistence
- Usable in a narrow space and no harm to the human body
- Production cost low and economical
- No chemical used. so no strong smell
- Shortened work time
- The whole water in the electrolytic cell is electrolyzed to generate high performance non-contaminant disinfectant water
- Low electrical current used for the electrode - high durability and long life
Principle and specifications
Disadvantages A small amount of an additive (salt) is required to speed up the reaction
Notes - It takes 408 KRW to generator 1t (1,000 L) of electrolytic disinfectant water (electricity cost + refined salt)
- The residual chlorine should be 4mg/1L or less according to the water quality standards (tap water) of Ministry of Environment
Permission - Product permitted by KFDA
(food additive manufacture permission: 2006-RA0001, Disinfectant: 2006-5)
Notes - If you want to use the disinfectant water that is harmless to the environment and human body and has no persistence, you should use the disinfectant water that is generated by electrolyzing the water
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