. Wastewater source and characterization
The wastewater sample was obtained from a local Vitamin B6 (VB6) manufacturer in Xianning (a city in Hubei Province, China). The characteristics of pharmaceutical wastewater used for the study were shown in theTable 1.
Preliminary experiments showed that the biodegradability (BOD5/COD) of the wastewater was under 0.1, thereby it is not amenable to biological treatment.