Cyclic filtration system

A method of filtering a fluid with components via positive and negative pressure oscillation comprising:

• performing one or more filtration cycles on fluid with components, each filtration cycle comprising:
• creating an oscillating positive and negative transmembrane pressure gradient in an influent side of a filtering chamber containing the fluid with components relative to a separation surface using an oscillating transmembrane pressure generator;
• wherein the oscillating positive and negative transmembrane pressure gradient in the influent side of the filtering chamber results from the oscillations between a forward flow of the fluid and a reverse flow of the fluid;
• displacing a portion of the forward flow of the fluid from the influent side of the filtering chamber, through the separation surface and into a filtrate side of the filtering chamber using the pressure gradient of the forward flow of the fluid formed by the oscillating transmembrane pressure generator, filtering at least a portion of the components of the fluid from the influent side with the separation surface, and forming a filtrate with a concentration of components in the filtrate side of the filtering chamber;
• wherein the concentration of components of the fluid in the influent side is higher than the concentration of components in the filtrate;
• and
• displacing a portion of the reverse flow of the fluid in the influent side of the filtering chamber using the pressure gradient formed by the oscillating transmembrane pressure generator;
• and
• performing a backwash cycle consisting of:
• opening a backwash fluid valve on the filtrate side of the filtering chamber;
• providing the backwash fluid on the filtrate side of the filtering chamber;
• dislodging at least a portion of the components previously retained on the separation surface during the one or more filtration cycles using a backwash fluid flowing from the filtrate side of the filtering chamber, though the separation surface, and into the influent side of the filtering chamber;
• wherein the concentration of components in the backwash fluid in the influent side of the filtering chamber is higher than the concentration of components in the backwash fluid in the filtrate side;
• opening a backwash discharge valve on the influent side of the filtering chamber;
• and
• draining at least a portion of the backwash fluid away from the influent side of the filtering chamber through the backwash discharge valve and away from the influent side of the filtering chamber;
• wherein the direction of flow of both the backwash fluid and the reverse flow of the fluid during the one or more filtration cycles are the same.