The companies comprise pharmaceutical and fermentation companies, e. g., Ninxia Eppen Biotech Co., a major MSG producer. The authority reclaimed that malodorous gas pollution prevention and control facilities were imperfect, environmental management was lacking, and in one case a sewage treatment station was closed. The companies were admonished to speed up the progress of governance, in strict accordance with the Central Eigth Environmental Protection Plan, and complete by the end of this year measures for a comprehensive treatment of malodor.

China Bio news release, August 28, 2017