Selection of Destabilizing Agent Formula for Treating Polymer-containing Sewage

The residual polymers in produced water can result in contents of suspended solid and oil exceeding stan-dards,filtering medium seriously hardening and viscosity of water after dehydration going up from original0.5mPa.s to2mPa.s.Single clarifier designed for sewage from waterflooding operation cannot meet sewage settle-ment indexes.Destabilizing agent formula was optimized.Field application of the new formula achieved a degraded rate of74.1%and a reduced rate of66.7%and the con-tents of both suspended solid and oil in water from theⅢMay2002Henan Petroleum outlet of settlement tank met the water quality standards.