Abstract
This research is a continuous research and aims to develop "living machine" that is an ecological sewage purification system. We evaluated the plant performance by analyzing the water quality and measuring the biomass growth. On the system constructed in 2003 year, which is the complete water culture system without filtering materials, we could get a basic knowledge that this system could decrease a nitrification of inorganic nitrogen and the phosphorus in sewage water. On the improved system in 2004 year, which has zeolite as filtering material, we could declare that at the first step, the nitrogen in sewage decreased rapidly and then increased temporarily, after that, it decreased gradually. We could evaluate the function of the system progressed. Because the problem in this system was the spread of insects, in the next time, we will try to invite the helpful insects against harmful insects by planting some herbs in the system as an ecological measure.
