Anaerobic biological treatment of industrial saline wastewater: fixed bed reactor performance and analysis of the microbial community structure and abundance.

The purpose of the present work is to treat saline Tuna fish wastewater, with the salt concentration of 43 g L and total organic carbon (TOC) of 8.3 g L, using an anaerobic fixed bed reactor involving salt-tolerant bacteria from the natural hypersaline environment during 150 days. The highest volatile solids (VS) removal efficiency of 84.