Treatment of pigment wastewater and generation of natural gas standard biomethane in Hangzhou, China

Dec 2021

This case story describes a biogas plant treating pigment wastewater in Hangzhou, which is a typical project for environmental protection in China’s coastal industry. The facility can treat 4.5 million tonnes of sewage annually.  The produced biogas is desulfurized and upgraded, after which it is injected into the natural gas grid. Overall, the facility reduces 11,250 tonnes of COD pollutants, and produces 2.7 million cubic meters of natural gas equivalent annually.

Figure: The flow chart of treatment process at the Hangzhou Lily Group Co.,Ltd

Case Study: Pigment Wastewater_China_ December_Final 2021