Combination of Captivator and Fixed Film Bioreactor Solutions

A wastewater treatment system comprising:

• a contact tank having a first inlet fluidly connectable to a source of wastewater to be treated, a second inlet, and an outlet, the contact tank configured to treat the wastewater with waste sludge to form a mixed liquor;
• a dissolved air flotation unit having a first inlet fluidly connected to the outlet of the contact tank, a second inlet fluidly connectable to a source of gas, a floated solids outlet, and an effluent outlet, the dissolved air flotation unit configured to treat the mixed liquor with the gas to form floated solids and an effluent;
• a fixed film reactor having a first inlet fluidly connected to the effluent outlet of the dissolved air flotation unit, a second inlet, and an outlet, the fixed film reactor configured to form a fixed film effluent;
• and
• a solid-liquid separation apparatus having an inlet fluidly connected to the outlet of the fixed film reactor, an effluent outlet, and a waste sludge outlet in fluid communication with the second inlet of the contact tank and the second inlet of the fixed film reactor.