The Zhenghe (Group) Co’s wastewater treatment and deodorization plant passed an inspection recently of its de-oiling process and new technologies for the deodorization processes. The waste gases from petrochemical and oil refining are a major source of air pollution, so, Zhenghe has worked hard in recent years to improve its wastewater treatment and deodorization for environmental quality and to protect the health of workers. The plant is currently running a trial operation to help it reach its goal of bringing the discharge of bad waste up to standards, and improve air quality at the treatment site and in the surrounding environment.