What is the best sterilization method for circulating water tanks?
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:) In our facility, chlorine dioxide is used for disinfection in the circulating water pool (via a dedicated chlorine dioxide disinfection system), with the target being a residual chlorine level of 0.5 ppm as measured one hour after addition. However, if the dosing frequency is too high and the system is operated almost every day, the effect remains poor (even when testing the residual chlorine level on the day after use, it is practically zero), yet the system load remains within normal ranges! Let’s discuss here what good methods are currently available for sterilizing circulating water, and which one is the best!
This post was last edited by cdpulin on 2010-7-12 at 15:50. I wonder if the original poster has considered using methods that do not involve the use of chemical additives. Our company has a device for killing bacteria and algae, one that uses copper and silver ions. If you are interested, feel free to send me a message with your email address, and I’ll send you some information for your reference.
In fact, for oxidative algae control, chlorine-based agents are currently used the most, such as sodium hypochlorite, liquid chlorine, chlorine dioxide, and chlorine tablets; each of them has its own advantages and disadvantages. In terms of effectiveness, the use of liquid chlorine yields the best results. The amount and timing of its application are not fixed; they can be adjusted according to the quality of the incoming water and the season. For example, during spring and summer, when algae and bacteria multiply more rapidly and their concentrations are higher, the duration of chemical treatment can be increased to eliminate these organisms as much as possible, rather than relying solely on time and residual chlorine levels.
Reply to 3# cdpulin: This is not measured based on time or residual chlorine. Measuring the residual chlorine level after one hour is a technical requirement following the addition of chemicals; it serves as a criterion for assessing the level of residual chlorine after such addition. These are the requirements for setting the dosing scheme.
I recommend using hypochlorite; it works very well and also has a sludge-removing effect. It’s just a bit more expensive.
In daily killing of organisms, chlorination can be carried out using an intermittent pulse dosing method. Residual chlorine does not have to be present all the time. The effectiveness of killing microorganisms depends on the number of heterotrophic bacteria in the system How much clay is there? The oxidation potential of chlorine dioxide is the highest among several halogen-based oxidizing biocides; its bactericidal effect is certainly better than that of sodium hypochlorite, liquid chlorine, chloramine T, and hypochlorous acid, so there is no need to switch to another agent. Of course, chlorine dioxide has no descaling effect; therefore, non-oxidizing biocides such as isothiazolinones and 1227 can be added periodically (about once a month) as a supplement