Using wetland filtration for processed water purification The Rotzon technique of using a wetland for water purification is primarily based on the biological degradation accomplished by bacteria in the roots of the marsh grasses. The bed under the grass is comprised of pebbles which also possess natural filtering properties, and a certain degree of chemical degradation happens as metals bind to acids within the pebble bed or the grass itself. The need for additional energy is very low since the water drains through the system gravitationally and oxygen is added to the water through the plants. The natural complexity of microorganisms makes this technique highly adjustable to changes in the drainage concentration and volume.
To reduce the content of Biological Oxygen Demand (BOD7) and
Chemical Oxygen Demand (COD) in our processed water.
Reduce COD by 70%
Reduce BOD7 by 80%
The purification levels resulting from trials demonstrated that the method indeed lowered the concentration of BOD7 and COD but not to a standard that we could use it. We are still working to find ways to lower the concentration in better ways.