Abstract:
In waste treatment tanks having overflow weirs on the sides thereof, a scraper assembly in which scraper blades are each pivoted to a lowered position on the tank floor with the blade ends extending beneath the weirs, and a raised position in which the blades are positioned above the weirs, without additional movement of the scraper blades along the pivot axes. The pivot axes are angled rearwardly and/or downwardly from the tank edge to achieve this operation.
Abstract:
A cleaning device for a filter press. A spray tube is mounted on a carriage beneath the filter plates, the carriage being movable lengthwise of the filter press and including a device to lift and lower the spray tube between a lowered position and a raised position, the spraying tube being located in the raised position between filter plates to clean the same. The carriage may ride along the side bars of the filter press or it may ride along the top of a cake-catching basin located beneath the filter plates.
Abstract:
A METHOD AND APPARATUS IN WHICH A LIQUID TO BE TREATED IS PLACED IN AN ELONGATED AERATION TANK AND AN AERATION DEVICE, ADJUSTABLY MOUNTED ON A BRIDGE EXTENDING ACROSS THE TOP OF THE TANK, IS MOVED IN THE ELONGATED DIRECTION OF THE TANK. ONLY THE LIQUID IN THE AREA BELOW THE DEVICE IS AERATED AND MIXED, THE OTHER AREAS OF THE TANK BEING RELATIVELY QUIESCENT FOR TRHE PROMOTION OF FLOCCULATION. A SLUDGE SCRAPER ATTACHESD TO THE BRIDGE MOVES THEREWITH TO SCRAPE SLUDGE FROM A SECONDARY TANK ADJACENT THE AERATION TANK.
Abstract:
Adjacent filter plates of a filter press are connected by links permitting the plates to close and separate. Some plates have a cam thereon which moves between an operative position and a neutral position, moving to the former position in response to movement of its associated links to a filter plate separated condition. An engaging dog moves along the filter press, engaging an operative cam to move at least one but preferably a group of filter plates to an open, separated condition.