Method for treating emulsifying wastewater of heavy crude petroleum

The invention discloses a method for treating emulsifying wastewater of heavy crude petroleum. The method comprises the following steps: adding a magnetic demulsifier Fe3O4-CS in the emulsifying wastewater of the heavy crude petroleum; stirring and dissolving the magnetic demulsifier in the wastewater; and settling the wastewater dissolved with the magnetic demulsifier Fe3O4-CS in a magnetic field. Chitosan (namely CS) is macromolecule alkaline polysaccharide polymer with positive ions, and can serve as a demulsifier of O/W type emulsified liquid. The chitosan without biotoxicity and organic acid are jointly used for modifying Fe3O4 which has superparamagnetism and does not have biotoxicity, the environmentally friendly magnetic demulsifier Fe3O4-CS is prepared and is used for treating the high-stability waste water of the heavy crude petroleum, the unexpected technical effect is achieved, oil in the waste water is removed successfully, and the removal rate can reach 99.9%. 本发明公开了种重质石油乳化废水处理方法，向重质石油乳化废水中加入磁性破