Fluid stream hydrodynamic separator with high flow bypass

A system for separating waste materials from a flowing stream of surface water, said system comprising a vertical cylindrical vessel and a vertical structure comprising stacked filtering elements and weirs located within and spaced from an inner wall of the cylindrical vessel, said system sized to accommodate a projected normal fluid flow condition as well as an increased projected fluid flow for an abnormally high surface water flow condition, said system configured so that the flowing stream containing waste material entering the vessel

• a. flows into a peripheral space between the inner wall of the cylindrical vessel and the vertical structure located within the cylindrical vessel,
• b. the flowing stream passes through a filtering wall portion of the vertical structure, and
• c. exits through and effluent pipe located at a lower portion of a central space enclosed within the vertical structure,
• the system comprising a cylindrical structure within the cylindrical vessel designed to accommodate a projected normal flow and an overflow structure mounted within the cylindrical vessel and on a top portion of the cylindrical structure, said cylindrical structure comprising at least one vertical cylindrical filtering element and said over flow structure comprising a combination of one or more upwardly extending filtering structures and one or more weirs sized to receive flow in excess of the projected normal fluid flow and filter at least a portion of the waste material from said excess flow and to direct such excess flow to the effluent pipe wherein the overflow structure comprises
• a. a first overflow filtering structure sized to filter a first increased flow rate in excess of the projected normal fluid flow,
• b. a second overflow filtering structure sized to filter a second increased flow rate in excess of the first increased flow rate,
• c. a first weir attached to the top of the second overflow filter structure, said first weir sized to accommodate a still further flow increase and provide access to the central space enclosed within the vertical structure by flow over a top of the first weir, and
• d. a second weir extending above and below the top of the first weir,
• such that all of the flow of fluid in both projected normal and projected abnormal fluid flow enters the system and exits the system through the effluent channel with at least a portion of the waste material being filtered and baffled by the several filtering structures so as not to exit the structure through the effluent channel.

A system for separating waste materials from a flowing stream of surface water, said system comprising a vertical cylindrical vessel and a vertical structure comprising stacked filtering elements and weirs located within and spaced from an inner wall of the cylindrical vessel, said system sized to accommodate a projected normal fluid flow condition as well as an increased projected fluid flow for an abnormally high surface water flow condition, said system configured so that the flowing stream containing waste material entering the vessel

• a. flows into a space within the inner wall of the cylindrical vessel and the vertical structure located within the cylindrical vessel,
• b. the flowing stream passes through a filtering wall portion of the vertical structure, and
• c. exits through and effluent pipe located at a lower portion of the cylindrical vessel,
• the system comprising a cylindrical structure within the cylindrical vessel designed to accommodate a projected normal flow and an overflow structure mounted within the cylindrical vessel and on a top portion of the cylindrical structure, said cylindrical structure comprising at least one vertical cylindrical filtering element and said over flow structure comprising a combination of one or more upwardly extending filtering structures and one or more weirs sized to receive flow in excess of the projected normal fluid flow and filter at least a portion of the waste material from said excess flow and to direct such excess flow to the effluent pipe wherein the overflow structure comprises
• a. a first overflow filtering structure sized to filter a first increased flow rate in excess of the projected normal fluid flow,
• b. a second overflow filtering structure sized to filter a second increased flow rate in excess of the first increased flow rate,
• c. a first weir attached to the top of the second overflow filter structure, said first weir sized to accommodate a still further flow increase and provide access to the central space enclosed within the vertical structure by flow over a top of the first weir, and
• d. a second weir extending above and below the top of the first weir,
• such that all of the flow of fluid in both projected normal and projected abnormal fluid flow enters the system and exits the system through the effluent channel with at least a portion of the waste material being filtered and baffled by the several filtering structures so as not to exit the structure through the effluent channel.