Vortical cross-flow filtration system

A filtration device comprising:

• a first opening and a second opening that is smaller than the first opening;
• and
• a vortical filter for receiving a fluid extending away from the first opening towards
• the second opening, the vortical filter comprising a helical coil having at least one rib extending continuously from the first opening to the second opening, wherein the at least one rib has a width that comprises 30% to 60% of the radius of the helical coil at the first opening,
• the vortical filter being configured to generate vortices in the received fluid entering the vortical filter via the first opening and being configured such that filtered fluid exits the side of the vortical filter through a filter media surrounding at least a portion of the circumference of the vortical filter between the first opening and the second opening, wherein filtered materials substantially exit the vortical filter at the second opening,
• wherein the filtration device is configured to filter discharge fluid from a washing machine and to filter microplastics from the discharge fluid.

A filtration device comprising:

• a first opening and a second opening that is smaller than the first opening;
• and a vortical filter for receiving a fluid extending away from the first opening towards
• the second opening, the vortical filter comprising a helical coil having at least one rib extending continuously from the first opening to the second opening, wherein the at least one rib has a width that comprises 30% to 60% of the radius of the helical coil at the first opening,
• the vortical filter being configured to generate vortices in the received fluid entering the vortical filter via the first opening and being configured such that filtered fluid exits the side of the vortical filter through a filter media surrounding at least a portion of the circumference of the vortical filter between the first opening and the second opening, wherein filtered materials substantially exit the vortical filter at the second opening,
• wherein the filtration device is configured to filter discharge fluid from a washing machine and to filter microplastics from the discharge fluid, and
• wherein the filtration device is configured to filter at least 75% by mass of said microplastics from the discharge fluid when post-filtered to 10 microns after the washing machine completes 4 or more loads of laundry.

A filtration device comprising:

• a vortical filter comprising a tapered helical coil comprising a first opening, a second opening, a rib, and a cross-flow filtration region between the first opening and the second opening;
• the tapered helical coil having an interior raker reduction ratio β/α in a range between 1.0 and 10.0 including the end points of the range,
• wherein the vortical filter is configured to generate vortices in a fluid entering the vortical filter via the first opening and being configured such that the filtered fluid exits through a filter media of the cross-flow filtration region, and
• wherein the vortical filter is configured such that filtered particles substantially exit the vortical filter at the second opening.