- OHK Co., Ltd is a technology innovator that continues to grow after being founded in 1999. - The business of OHK is environmental industry. OHK is specialized in producing of environmental facilities that are required for sewage treatment and waste water treatment process. The main products are dewatering equipment for sludge, thicking equipment for sludge and etc facilities. - OHK has received 20 technical certifications from the government. For example, the New Technology (NET), New Product (NEP), Excellent Machine (EM), etc. - OHK has 25 patents and has received 12 awards from the President, Secretary, etc. OHK is investing an annual 6-8% in the R/D field.