旧松尾鉱山鉱害防止工事の概要
1984 年 100 巻 1160 号 p. 1031-1038
詳細
1984 年 100 巻 1160 号 p. 1031-1038
In order to solve the water pollution problems at abandoned Matsuo sulpher-pyrite mine, the Japanese Government, the Iwate Prefectural Government and their concerning organizations have taken such measures as water sealing by plugging at the lowest portal level, construction of water way partially diversing surface water, reclamation of abandoned open pit etc., since 1970.
Among these measures, installation of the new neutralization plant, which is the major project for treating acid mine drainage from the mine, had been commenced in Aug.1977 and completed in Nov. 1981.
The plant is the newest and largest plant treating acid mine drainage in Japan, and its construction cost was approximately 9, 300 million yen.
The plant includes a bacterial oxidation system for converting the ferrous salt contained in the drainage to ferric salt prior to neutralization.
It enables the neutralization by calcium carbonate, resulting in a considerable saving of the treatment cost of acid mine drainage at the mine.
