Envirex Inc.

Robert A Brummond

Roger Scheel

Karen Dejewski

James L Heidner

Richard Kormanik

A bar screen for screening a flow of wastewater, the bar screen comprising a frame, a first bar rack supported by the frame and extending across the flow of wastewater, the first bar rack including a plurality of generally parallel, elongated first bars each having a top end and a bottom end, the plurality of first bars defining therebetween a plurality of upstream spaces, a first bar rack top support engaged with the top end of each first bar and a first bar rack bottom support engaged with the bottom end of each first bar, a second bar rack supported by the frame and extending across the flow of wastewater, the second bar rack including a plurality of generally parallel, elongated second bars each having a top end and a bottom end, a second bar rack top support engaged with the top end of each second bar and a second bar rack bottom support engaged with the bottom end of each second bar, the second bar rack bottom support overlying a portion of the first bar rack bottom support, and a mounting arrangement for fixing the first bar rack to the frame and for releasably mounting the second bar rack on the frame, the first and second bar racks thereby defining a fine screen compound bar rack wherein the second bars have a portion extending into a respective upstream space.

Bar screen having compound fine screen bar rack

A belt press for use in removing water from sewage sludge, and including a frame, a pair of belts for compressing sludge material therebetween, the said belts being water-permeable whereby water in said sludge may drain through said belts, and a gravity belt thickener adjacent the belt press. The gravity belt thickener includes a belt having a belt flight adapted to support sewage sludge thereon, the belt of the gravity belt thickener having a width greater than the width of the belt of the belt press.

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Waukesha, WI, United States of America

Robert A Brummond