Hydro excavation vacuum apparatus that process spoil material onboard the apparatus by separating water from the cut earthen material are disclosed.

Described herein is a method for cleaning an electrocoating bath in a continuous facility, where a skid connected to a conveying installation is conveyed through the electrocoating bath, and where the skid includes a filter medium; the filter medium is secured on the skid via at least one movable connecting element; the movable connecting element allows the orientation of the filter medium at the interface between electrocoating bath and air; and, after immersion of the skid into the electrocoating bath, during the conveying of the skid through the electrocoating bath, the filter medium is oriented at the interface between electrocoating bath and air and is drawn along the surface of the electrocoating bath. Also described herein is a skid for use in the cleaning method.

Hydro excavation vacuum apparatus that process spoil material onboard the apparatus by separating water from the cut earthen material are disclosed.

Methods and systems are provided for a drum filter system of a fryer system. The drum filter system includes an enclosure comprised of a hood and a tank, wherein a bottom portion of the hood is reversibly coupled to a top portion of the tank, wherein the enclosure is in a closed stated when the hood is physically engaged with the tank and the enclosure is in an open state when the hood is spaced away from the tank. The drum filter system also includes an actuator coupled to the hood that when activated transitions the enclosure between the closed state and the open state.

A concentration device for concentrating a liquid containing a target object, the concentration device including: a container configured to store the liquid containing the target object; a filter in the container; and a position control portion configured to change a position of the filter in the container.