http://blogs.washplus.org/drinkingwaterupdates/2012/01/impact-of-a-natural-coagulant-pretreatment-for-colour-removal-on-solar-water-disinfection/ from the WASHplus Project Tue, 22 Sep 2015 12:34:42 +0000 hourly 1 http://wordpress.org/?v=3.1.4