Bottle drinking water contained many floc. What is the reason? This water produced from fully automated systems.
Hi Mohammad, two types of conditions may be considered for the formation of floc. One is the mineral precipitation. There are typical several types of minerals and their oxides, such as Mn, Al, Ca, Mg, and silicate. You can testify this possibility by adding HCl to see whether the floc disappear or not. The other reason is microbial contamination. Mildew and actinomycetes are very common to cause the floc problem. This possibility could be testified by cultivating the floc and analyze the results. Hope this is helpful.
Please look at the following below links which may help you in your analysis:
https://www.egr.msu.edu/~hashsham/courses/ene806/docs/Color%20Removal%201.pdf
Thanks
Dear Islam,
What about the colour of the floc formed in your sampe.
In addition to answer provided by Shang, IF the floc is brown in colour, It could be Fe2O3.
If It is white in colour, sample has rrelativity high hardness there is possibility to form CaCO3.
Piya Aravinna
The floc colour is white. How I can remove it from drinking water?@A. G. Piyal Aravinna
Dear Islam,
what about the hardness or the water.
if reason is not the hardness, sometime, this could be bacterial growth.
If this is a bottleD drinking water（avilable in market), It is defficult to use traditional treatment.
filtering can be recomended. if the reason is temporary hardness, you can boil water to remove it, in some extent.
if this is bacterial growth, boil and filter before drinking.
Piyal Aravinna
For the removal of flock coagulation, sedimentation and filtration may be experimented.
Its important to know the reason of floc formation to specify the way of treatment physically or chemicaly
By using Aluminium sulphate as coagulant we can obtain ppt which can easly remove from water by filteration using purification ponds .also we can use Jar test to dtermine the amount of Alum needed to ppt the floc out of the water
Prof Dr Fathi kamel awad
Mohammad Nazrul Islam Bhuiyan ; Since you mentioned as bottled water, we are assuming that all process is being followed to control/ eliminate physical & biological impurities. However, if you share the treatment scheme it would be easy to predict the possible reasons. If everything looks like perfect, kindly try to test the water in stage wise. Sometime final treated water storage tank gives the room for micro biological growth! since it’s to open to atmosphere and if the tank is not cleaned in recent days & fresh water passage through might be very limited & long storage time.
Mohammad Nazrul Islam Bhuiyan , what are the treatment steps?
Basically hybrid micro filtration or Ultrafiltration could remove the flocs at a lower cost. If you share more information, we may able to discuss more on this.
Image source (hybrid micro-filtation) :
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For the removal of flock coagulation, sedimentation and filtration may be experimented.
Normal flocs which form during coagulation-flocculation in alum treatment can be removed by sand filtration. But some flocs form in bottled water, reason is not clear how it can be removed. Please find out it.
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