A particle separation system, comprising: a vessel having at least one side wall and a bottom wall forming an internal chamber within the vessel; a filtration unit positioned within the vessel and comprising: a first filtration pack comprising a first plurality of filter elements having a first plurality of outlets; a first hollow manifold having a first plurality of inlets, a number of the first plurality of inlets being equal to a number of the first plurality of outlets, the first plurality of outlets and the first plurality of inlets being capable of coupling such that a flow through each of the first plurality of filter elements enters the first manifold; the first hollow manifold including a first outlet channel for flow from the first manifold to a processed fluid conduit; a second filtration pack comprising a second plurality of filter elements having a second plurality of outlets; a second hollow manifold having a second plurality of inlets, a number of the second plurality of inlets being equal to a number of the second plurality of outlets, the second plurality of outlets and the second plurality of inlets being capable of coupling such that a flow through each of the second plurality of filter elements enters the second manifold; the second hollow manifold including a second outlet channel for flow from the second manifold to the processed fluid conduit; wherein each of the first and second filtration packs is modular in that each of the first and second filtration packs can be individually inserted and removed from the vessel such that each of the first plurality of filter elements are insertable and/or removable together and each of the second plurality of filter elements are insertable and/or removable together. a vessel having at least one side wall and a bottom wall forming an internal chamber within the vessel; a filtration unit positioned within the vessel and comprising: a first filtration pack comprising a first plurality of filter elements having a first plurality of outlets; a first hollow manifold having a first plurality of inlets, a number of the first plurality of inlets being equal to a number of the first plurality of outlets, the first plurality of outlets and the first plurality of inlets being capable of coupling such that a flow through each of the first plurality of filter elements enters the first manifold; the first hollow manifold including a first outlet channel for flow from the first manifold to a processed fluid conduit; a second filtration pack comprising a second plurality of filter elements having a second plurality of outlets; a second hollow manifold having a second plurality of inlets, a number of the second plurality of inlets being equal to a number of the second plurality of outlets, the second plurality of outlets and the second plurality of inlets being capable of coupling such that a flow through each of the second plurality of filter elements enters the second manifold; the second hollow manifold including a second outlet channel for flow from the second manifold to the processed fluid conduit; wherein each of the first and second filtration packs is modular in that each of the first and second filtration packs can be individually inserted and removed from the vessel such that each of the first plurality of filter elements are insertable and/or removable together and each of the second plurality of filter elements are insertable and/or removable together. a first filtration pack comprising a first plurality of filter elements having a first plurality of outlets; a first hollow manifold having a first plurality of inlets, a number of the first plurality of inlets being equal to a number of the first plurality of outlets, the first plurality of outlets and the first plurality of inlets being capable of coupling such that a flow through each of the first plurality of filter elements enters the first manifold; the first hollow manifold including a first outlet channel for flow from the first manifold to a processed fluid conduit; a second filtration pack comprising a second plurality of filter elements having a second plurality of outlets; a second hollow manifold having a second plurality of inlets, a number of the second plurality of inlets being equal to a number of the second plurality of outlets, the second plurality of outlets and the second plurality of inlets being capable of coupling such that a flow through each of the second plurality of filter elements enters the second manifold; the second hollow manifold including a second outlet channel for flow from the second manifold to the processed fluid conduit; wherein each of the first and second filtration packs is modular in that each of the first and second filtration packs can be individually inserted and removed from the vessel such that each of the first plurality of filter elements are insertable and/or removable together and each of the second plurality of filter elements are insertable and/or removable together.