TREATMENT OF TREATING WASTEWATER CONTAINING HIGH LEVELS OF TOTAL DISSOLVED SOLIDS WITH A TANNIN-BASED POLYMER

摘要

Methods of removing suspended solids from wastewater containing high concentrations of total dissolved solids, such as produced water. The wastewater is treated with a modified tannin produced as a reaction product of tannin, an amino compound and an aldehyde. Optionally, an anionic or cationic flocculate may also be added. The treated water may then be subjected to conventional oil separation techniques.