Development of the method for seaweed bed restoration using steelmaking slag and compost

2014 Fiscal Year Final Research Report

• Project/Area Number: 24686100
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Recycling engineering
• Research Institution: The University of Tokyo
• Principal Investigator: MITSUO Yamamoto 東京大学, 海洋アライアンス, 特任准教授 (30361512)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 藻場再生技術 / 製鋼スラグ / 腐植物質 / 鉄 / 海藻培養 / モデル改良 / 技術導入設計 / 海域環境

Outline of Final Research Achievements

The development of the method for restoring seaweed beds using steelmaking slag and compost was investigated in this study. The influence of compost including humic substances on Fe elution from steelmaking slag and the growth of seaweed was evaluated. Fe elution test and culture examination of a blown alga, Eisenia bycyclis were examined. It was found that the kinds of composts mixed with steelmaking slag were related to the characteristic of Fe elution and the growth rate of the alga. On the other hand, the optimum installation process of the method was also examined. The model of the seaweed growth for evaluating the main possible factor that reduces seaweed beds was improved by changing some equations for the relationship between nutrient salts and seaweed growth. A new process for installing the restoration method in coastal area could be proposed based on the results of the environmental investigations.

Free Research Field

環境化学工学