We’d like to utilize contaminated water treatment for the reconstruction of Fukushima and to prevent environmental pollution. I took over the research from the predecessors and have attempted to develop a treatment system using these indigenous plants for the treatment of radioactively contaminated water, with the final goal of proposing a novel alternative to a current approach: discharge of treated water into the ocean.
In this research, by applying “Ta-Ta-Ki” soil, a traditional Japanese soil solidification technology, we developed a novel multifunctional water collection system to control soil runoff and increase food production with low environmental impact and low cost, and this system can be adapted to developing countries, especially in the arid and semi-arid areas.
(1) the water storage by collection and retention of rainwater during the rainy season; (2) the supply of trients to poor soil; and (3) the control of soil runoff caused by rainfall.
This inexpensive solidification technology with high operability can be an effective solution to environmental problems around the world, besides the areas with the demand for food production, as mentioned above.
Eutrophication is mainly caused by oversupply of nitrogen and phosphorus, and exerts negative impacts on ecosystem and safe drinking water source all over the world. In this project, a novel system was developed by combining energy-saving H2O electrolysis with an eco-friendly iron carbon battery, which continuously removes nitrate and phosphate. This system utilizes the oxidation/reduction of iron to realize low-voltage H2O electrolysis to produce H2 and can collect phosphorus, as well as it reuses solid waste (used tea leaves) and uses solar energy. The simple structure of this system also enables us to easily apply to on-site treatment of eutrophicated water in lakes and ponds in addition to the possible incorporation into the conventional wastewater facilities or septic tanks.
In both kidney beans and maize systems, the combination of nitrifying bacteria and mycorrhizal fungi can eliminate the nitrogen concentration effectively, and the growth of maize and kidney beans was enhanced by the existence of nitrifying bacteria.
On-site pilot experiments indicated that maize and kidney beans in the local lake provided an energy-saving and cost-effective alternative instead of conventional energy-intensive systems for water purification.