First, water is routed from an impervious surface to the first treatment cell ... is that the water can be allowed to exfiltrate out of the sand filter into the surrounding soil instead of using an ...

Biofiltration as a treatment technology in water and wastewater purification. The arrow indicates the direction of water flow. Biofilters contain filter medium grains (e.g., sand, granular ...

If you plan ahead a little bit you could have your own system of water purification to use in emergencies. Everyone needs clean drinking water and this gadget will let your produce your own ...

The Minnehaha Creek Watershed District is taking an innovative approach to lowering the amount of phosphorus in Dutch Lake and Jennings Bay of Lake Minnetonka. Utilizing technology used primarily ...