Development of environmental resource recycling system intended for N and P

2016 Fiscal Year Final Research Report

• Project/Area Number: 26450347
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Rural environmental engineering/Planning
• Research Institution: Tokyo University of Agriculture
• Principal Investigator: Okazawa Hiromu 東京農業大学, 地域環境科学部, 教授 (30385504)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 石炭灰 / クリンカアッシュ / 窒素 / リン / 再利用 / 資源循環 / 農業 / 吸着

Outline of Final Research Achievements

This study clarified N and P adsorption ability of clinker ash(CA) by grain size. The possibility of returning nitrogen-adsorbed CA for crop cultivation was also examined. CA was categorized into 6 different particle sizes through a sieve. 30 g of each particle size were filled in a cylindrical container. We poured 200 ml of polluted water into the container and sampled the water which went through theCA in the container. Then we measured the concentration of N and P in the extracted water. For a vegetation experiment, spinach was planted on the clinker ash that had been used in the nitrogen adsorption experiment. The stem height of the plant was measured.
The adsorption experiment showed a tendency that the concentration of the pollutants is decreased after going through CA when its particle size is 425 micrometers or smaller than that. In the vegetation experiment for spinach using N adsorbed clinker ash, it was found that the plant cultivated in CA showed the greatest growth.

Free Research Field

水質環境工学