Patent ID: 9150430
Filing Date: 2015-10-06
Classification: B01D,B03D,C02F

Abstract:
1. A method for removing immiscible fluid from contaminated water from a source, the method comprising: (a) providing a water treatment vessel having at least one chamber, an inlet weir located and supported in an upper region and within the at least one chamber and having a lip to direct fluid overflowing said lip to flow into an uppermost region of said chamber, a fluid inlet in fluid communication with said inlet weir for supplying said contaminated water to said inlet weir, and an immiscible fluid weir supported within the at least one chamber and spaced from the inlet weir; (b) providing the water treatment vessel with immiscible fluid weir height adjustment means; (c) transmitting the contaminated water from the source toward the at least one chamber and said fluid inlet by an injection line; (d) providing bubble generation means for generating bubbles; (e) generating and injecting the bubbles into the injection line; (f) allowing the bubbles and the contaminated water to mix in the injection line to form an inlet fluid; (g) injecting the inlet fluid into the at least one chamber at said fluid inlet; (h) allowing the inlet fluid to pass over the inlet weir and direct immiscible fluid passing over the lip of the inlet weir along an upper surface of fluid within said chamber in a direction of the immiscible fluid weir; (i) allowing cleaned water and a remaining mixture of immiscible fluid and gas bubbles to separate from each other; (j) allowing the cleaned water to flow downwardly by gravity to a cleaned water outlet located at a lower region of said at least one chamber and withdrawing said cleaned water from said lower region of said at least one chamber; (k) adjusting the immiscible fluid weir height adjustment means to minimize cleaned water loss over the immiscible fluid weir (l) draining off the cleaned water through the cleaned water outlet; (m) allowing the remaining mixture of immiscible fluid and gas bubbles to float across the at least one chamber and over the immiscible fluid weir; and (n) allowing the immiscible fluid to collect in a trough within the at least one chamber and flow out an immiscible fluid outlet.