No. 142: Environment-conscious method using seaweed extracts to purify turbid water (August 24, 2010)

Toyo Construction, a medium-sized construction company in Tokyo, completed the green technology to purify turbid water using natural substances extracted from seaweeds and started to offer the technology to civil engineering works of auto parts manufacturers. The company developed an alginate additive for turbid water treatment as the auxiliary agglomeration agent in alliance with a food-processing company and successfully paved the way for mass production. It wishes to expand the scope of the application and cover public projects like ports and harbors development as an environment-conscious construction method to replace the existing method that uses chemical polymer auxiliary agglomeration agents. The auxiliary agglomeration agent developed by this company is mainly made up of algin acid and calcium chloride. The company recycles waste parts of cultured seaweeds to extract the auxiliary agent. Related web page: http://www.toyo-const.co.jp/index.html