In October 2017, KOSUN Environmental Black Rhino BRRD series equipment facilitated the local riverway dredging project in Yantai, Shandong. In the project, Black Rhino riverway dredging system, designed and manufactured by KOSUN Environmental, treated about 40,000m3 bottom mud polluted by medium and severe heavy metal and shortened the period of river regulation. A large amount of polluted river sand was backfilled into the river channel after being purified by the system, which effectively reduced the subsequent treatment cost of the project.