It approved ISO9001:2000,NSF certificate.ASTM 1. Product Informationto be used for dechiorination, deoiling of industrial water such as tood, chemical industry, electric plate, etc, and further purifying treatment of potable water and sewage water. Activated carbon To be used for dechlorination, deoiling of industrial water such as food,chemical industry,electric power,electric plate, etc,and ...