Abstract: A cover apparatus for inhibiting the growth of algae on the fluid-contacting surfaces of a water treatment tank and for capturing noxious gases, the tank including a central influent, at least one substantially vertical peripheral wall having an upper and interior surface, a peripheral baffle having inside and outside surfaces, a substantially vertical weir, a spillway, and a launder channel having a width. The cover apparatus includes at least one panel member positionable over at least a portion of the launder channel to prevent light from reaching interior surfaces thereof. In an embodiment of the present invention, alternating covers are provided with a molded recess so that the covers may be mounted in end-to-end alignment to form a substantially sealed launder channel region.

Abstract: A cover apparatus for inhibiting the growth of algae on the fluid-contacting surfaces of a water treatment tank including a central influent, at least one substantially vertical peripheral wall having an upper and interior surface, a peripheral baffle having inside and outside surfaces, a substantially vertical weir, a spillway, and a launder channel having a width. The cover apparatus includes at least one panel member positionable over at least a portion of the launder channel to prevent light from reaching interior surfaces thereof. In a preferred embodiment of the present invention, a plurality of modular panel members are employed to cover substantially the entire launder channel, with each individual panel member being dimensioned to span at least the width of the launder channel and comprising a substantially opaque material.

Abstract: A vented baffle system for use in a clarifier tank having a tank bottom, a periphery and a substantially vertical peripheral wall bounding the interior of the tank is formed by a plurality of individual and cooperatively-engageable baffles mounted on the peripheral tank wall. Each baffle includes a panel member that downwardly slopes from the peripheral tank wall toward the interior of the tank and the tank bottom and terminates at a lower edge disposed in space relation above the tank bottom. A first lateral end of the panel member unitarily carries an end bracket securable to the peripheral wall for supporting the panel member in a cantilevered fashion. One or more of the baffles are provided with a relief valve means for venting the pressure in a space formed between the junction of the lower side of the panel member and the peripheral tank wall. The resulting system provides a vented baffle system in which pressure exerted by the build up of gases in the space may be alleviated.