Disinfectants obviously controls biofilm growth. But increasing dosing pose health problems as well. In addition, unpleasant taste and odour are results of increased dosing. Are there any other methods to control biofilm growth. Some studies say biofilm growth improves the efficiency of systems by reducing pipe roughness initially, however it increases when pipes are old. What is the better cheaper method to clean biofilms from older pipes?
Alternatively to using higher disinfectant concentration one could decrease the assimilable organic concentration in the distributed water by treatment prior to disinfection.
This could be done by a biological sand filter, biological activated carbon (BAC) or just plain activated carbon treatment (column or powder).
An added benefit of decreasing dissolved organic carbon in the distributed water is that the stability of the disinfectant increase so your concentration at the tap is closer to the initial concentration from the waterworks and the formation of by-products in the distribution system would also decrease.
Clean the water from any impurities that could serve as nutrients for microorganisms including inorganic salts (Fe, Mn...) That would reduce biofilm formation much better than disinfectants.
Nicolai sir, i have already done this whatever you told but it was not satisfactory.
Any idea what are nutrients consumed by microbial biiofilm in your pipes?
good morning sir
I hope all going well with you.
I have no clue about it.
If you have done are these and not seem to be getting the right results, i think probably you need to increase the contact time of the disinfectants whiles the concentration is not varied with the biofilm. If all of these are not working, then probably if the system is running with water supply, there may be leakages that could be admitting fresh nutrients into your system without you suspecting.
Growth of biofilm in reticulation systems can be reduced but at a high capital and operational cost. Therefore a cost benefit analysis is an imperative.
The solution requires a reduction in assimilable organic carbon (AOC). This will reduce the potentential for THM formation. Free chlorine residuals can then be maintained at 1.5 mg/L to manage the heterotrophic plate count without compromising THM guidelines.
Enhanced coagulation may reduce AOC – conduct jar tests. If ineffective it will be necessary to add on to a conventional treatment system the expense of an Ozone/BAC process or nanofiltration units.
Thanks Olusegun Abass
Good Morning
I hope you doing well.
have you apply Electropositive media in before? ok i will try it.
Mr. Mohamed
A lot of thanks,
Can you provide some literature related this, if you are having.
Regards
The Simplest way to remove biofilms is by using Bio-Organic Catalyst. It works on two levels 1 eliminates biofilms and 2 drives up the dissolved oxygen. It is made up of amphiphilic molecules which are lipophilic and hydrophilic.
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