The silicon circulation hypothesis based on slow sand filtration/ecological purification system

The quantity of silicate elution increases by the function of biofilm of slow sand filtration. I suppose this phenomenon to be "microbe weathering". The silicic acid which is not included in rainwater is recognized in the mountain stream. This is conformal when I think that it is the result of the function of microbe rising in the forest soil. It is announcement, I argue about three following items and to assume it a problem proposal. (1) About Si circulation hypothesis caused by the microbe weathering to read from past knowledge. (2) About the Si concentration change in slow sand filtration facilities. (3) About significance to increase Si supplies.