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Brilliant.  Are there any limitations to the bacterial kill and virus disablement of the powder?  In other words, if bacterial levels are extreme is there a threshold that the contents of the sachets cannot cope beyond and/or are there any bacteria (specifically e-coli and cryptosporidium) that it cannot handle? 

Good luck with the scaling phase.

Outstanding work.  Good luck with this.  

I really respect anyone and everyone who is making progress in this area of concern so well done.  I have one question:  What do you do to treat the waste that you collect in the toilets?   Would it be of any use to you to have a community sized, transportable sewage treatment unit to process the waste very locally and output bacteria-free clean water for use as toilet flush water/ crop irrigation?  If so let me know.  This is what we are working on but we have not yet got to India.  We want to be there before the end of the year though.