Options for disposing of bacterial strains

Dear Sir, Thanks for your updates on the new Testing Procedure. However, I would like to know about the following :- ( a ) What will be options for disposing the Bacterial strains after completion of the Testing? Is there any chance that cumulative Disposal at same point one after another may eventually lead to further contamination in a concentrated manner? ( b ) Is there any scope that such Bacterial Strain may be used for removal of Arcenic from drinking water> If yes, upto what extent / limit? Thanks. Regards. Nripendra Kumar Sarma  Guwahati, Assam (India)