Hi Lenin, it seems that if ...

Hi Lenin, it seems that if you are able to supply 10 m3/day from your rainwater collection system, you must have a large collection area and a large storage tank/reservoir - not a standard household roof collection system.  In this case it is probably quite difficult to manage your catchment area to prevent leaves and bird/animal droppings getting into your water storage.  It then seems you will have to consider treatment of the water rather than prevention of organics getting into your storage.  I agree with Chetan that a zeolite - activated carbon - chlorine dioxide system would be optimal for removing odours.  However if you are needing a more low cost and low operational requirement solution, you may want to test out the option of aeration over a charcoal filter (a trickling filter packed with charcoal), or just an activated carbon filter on its own.  I also agree with Louri that chlorine is usually not ideal for addressing odours - rather ozone, bromine or chlorine dioxide if the filtration system is inadequate.  Would be great if you can let us know the outcome and option you choose.  Regards Ian