Nanjing Zhonghengyuan Environmental Protection Technology Co., LTD., as an advanced enterprise in the treatment of high-nitrate nitrogen wastewater and a professional service provider of high-concentration refractory wastewater, is a high-tech enterprise with continuous innovation, independent research and development and achievement transformation capabilities, and has core independent intellectual property rights, and is a practitioner of energy conservation and emission reduction to achieve green environmental protection value. Since its establishment, the company has obtained 6 invention patents and more than 20 utility model patents, and was rated as a high-tech enterprise in 2015, approved by Nanjing Science and Technology Commission in 2016 and listed to establish Nanjing Engineering Technology Research Center, obtained the general contracting qualification of environmental protection engineering in 2019, and was rated as a specialized and special new enterprise in Nanjing. The company has passed ISO9001 international quality management system, OHSAS18001 Occupational health and safety management system, ISO14000 environmental management system and intellectual property management system certification.