▎ 摘　　要

NOVELTY - A fluid treatment system comprises a treatment unit (100) comprising an inlet for receiving a slop water stream into the treatment unit, a filtration medium (102) comprising a particulate pack at least partially coated with a zwitterionic polyelectrolyte (106), and which is arranged to separate a portion (P1) of the slop water stream in the treatment unit from a portion (P2) of the slop water stream in the treatment unit, an outlet (O1) on a side (S1) of the filtration medium (M1), and an outlet (O2) on a side (S2) of the filtration medium (M1) opposite the side (S1). The portion (P1) of the slop water stream comprises water. USE - System used for treatment of slop water recovered from wellbore operation (claimed). ADVANTAGE - The system provides improved treatment of the fluid recovered from the wells, and facilitates separating water from other fluids and contaminants, and facilitates disposal of the clean water or reuse of the clean water in the pit washing operation. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for treatment of slop water recovered from wellbore operations, which involves receiving a slop water stream in a treatment unit through an inlet of the treatment unit, contacting the slop water stream with the filtration medium (M1) of the treatment unit, separating the portion (P1) of the slop water stream from the portion (P2) of the slop water stream through the filtration medium (M1), discharging the portion (P1) of the slop water stream through the outlet (120) of the treatment unit, and discharging the portion (P2) of the slop water stream through the outlet (124) of the treatment unit. DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of the treatment unit with the flat filtration medium coated with the zwitterionic polyelectrolyte. Treatment unit (100) Filtration medium (102) Zwitterionic polyelectrolyte (106) Inlet (116) Outlets (120,124)