our task is to introduce the Japanese technology of aquatic-planted constructed wetland ,hoping to remove those N, P and algae contaminations in the inflow river mainly by the following three ways: truncation and adsorption of the plants’ roots, denitrification of the microorganism adsorbed on the roots and the nutrition absorption of plants.

The experimental result was that load input power changed less and consumption of electricity per ton increased and productivity decreased as moisture rates added under the same sieve pore diameter.