Systems and methods for treating wastewater are disclosed. A wastewater treatment
apparatus may include an intake unit, one or more gravity separation air flotation
units, and a discharge unit. The units or components may be modular and compatible,
have standardized sizes, shapes, and configurations, and may be assembled from
a limited number of standardized panels having standard size, shape, and configuration.
The apparatus may be expandable and allow the insertion of additional modular standardized
components made of panels. The intake unit may include a split input manifold and
baffle. A gravity separation air flotation unit may contain a raking system for
removal of a floc blanket that includes a blade with wheels or rollers that roll
along a shelf attached to the unit to distribute the weight of the blade. Sludge
containing particulate contaminants separated from the wastewater may be added
to a sludge tank that contains a chute and a cutter to assist with adding sludge
thickening agents such as diatomaceous earth.
