Abstract: An automated apparatus for introducing a mixed liquid base (lime) in a first container or tank (106, 106A) into a biological sludge in a second container (110, 110A and 110B) is described. The second container is used to house the sludge for a short period of time (2 to 12 hours) and then the liquid sludge is sent to a storage tank (112) for a longer period of time (6 months). The system (100) enables flushing of the lime supply conduits (108, 108A and 108B) with water to prevent clogging. The treated sludge is applied to soil as a fertilizer.

Abstract: A sludge scraper (10) for scraping sludge (107) from the bottom of a reservoir (100) is disclosed herein. The scraper includes a main frame (11) that provides for the mounting of a pair of skids (15), a scraper blade (17), and a pair of wheels (25). A first tow line (27) is connected between the frame and a first winch (109) mounted on a first shore (103) of the reservoir. A second tow line (41) is connected between the skids and a second winch (111) mounted on a second shore (105) of the reservoir. The first winch moves the plow over the bottom to plow sludge towards the first shore. The second winch causes the apparatus to rotate about the wheels so that the scraper blade is lifted off the bottom of the reservoir and the skids contact the bottom of the reservoir to facilitate movement of the apparatus toward the second shore for another pass.

Abstract: A sludge scraper apparatus for scraping a sludge sediment from an earthen bottom of a sludge reservoir, is described. The scraper apparatus is comprised of a main frame that provides for mounting a pair of skids, a scraper blade and a pair of wheels mounted on the apparatus. A first tow line is connected between the frame and a first winch, mounted on a first shore of the reservoir. A second tow line is connected between the skids and a second winch, mounted on a second shore of the reservoir. The first winch then moves the scraper apparatus over the earthen bottom of the reservoir from a starting position adjacent the second shore of the reservoir by spooling up the first tow line. This causes the scraper apparatus to move in a pass over the bottom of the reservoir, with the scraper blade plowing loose sludge sediment towards the first shore. Then, the second winch is used to move the sludge scraper back towards the second shore and the starting position by spooling up the second tow line.