Activated carbon sanitation service
All activated carbon that is applied in water purification, sooner or later becomes a source of bacterial proliferation (due to the organic matter that it retains). Then it becomes necessary to sanitize the coal, a task that is not easy since the coal decomposes the oxidizable agents that are used for this purpose (chlorine, ozone, hydrogen peroxide, etc.). Our company offers the service, the advice and the product suitable for sanitization.
Granular activated carbon is a very conducive medium for bacterial growth. On the one hand, it traps organic molecules, many of which are biodegradable, and therefore constitute food for these organisms. On the other hand, it has a rough surface that allows bacteria a good fixation, preventing them from being easily dragged by water. And finally, the charcoal destroys free chlorine, so this disinfectant does not reach all the sites where fixed microbes are found.
The biological activity in the CAG is advantageous in the sense that by degrading the organic matter, the sites that it occupied are left free, thus restoring the capacity of the coal to retain other pollutants. However, as mentioned above, the rapid reproduction speed of the bacteria generates an excess of biomass, which obstructs the bed, and is released into the water. Therefore, a chlorinated water -free of bacteria- that enters an adsorber, can leave not only dechlorinated but also loaded with these organisms.
The sanitization of the coal consists of destroying the microorganisms that are in it, with the greatest possible efficiency. Even if the total elimination of them is achieved, the litter will re-infect sooner or later. In the event that the water reaches the adsorber chlorinated, it will leave the adsorber dechlorinated, and therefore without a disinfectant protection. The bacteria can then recontaminate the carbon, entering through the bottom of the adsorber or through the discharge pipe. It is enough that there is a leak or leak at the base of the tank or in any of its connections, or that a sampling outlet becomes contaminated -which is not difficult-, or the same water discharge towards a point where it comes into contact with the environment.