Abstract: A water filtration vacuum cleaner that has a modular construction. A motor module fits deep into a central opening of a water tank module so that the center of gravity of the vacuum cleaner is lowered. The water tank module is then placed on top of a trolley module, which has a rotatable arm. When rotated into a substantially vertical position, the arm secures the water tank module and motor module to the trolley module. A vacuum hose connects into the water tank from above. The air path from the hose into the water tank module extends through an upper surface of the water tank module that incorporates the motor module. When activated, motor cooling air is drawn in through the bottom of a central opening in the trolley module.

Abstract: A method for processing recycling mill sludge into pulp, and cellulosic products made from such pulp, is described. The method for forming cellulosic pulp comprises first forming an aqueous composition in a pulper comprising recycling mill sludge, caustic agent, bleaching agent and a chelating agent. The aqueous composition also preferably includes a deinking agent and sodium silicate. The composition is then processed in the pulper for a period of time sufficient to form pulp from recycling mill sludge. The disclosure also describes a method for forming cellulosic products. The method comprises forming a cellulosic pulp from recycling mill sludge, and thereafter forming cellulosic products from the pulp. The method for forming cellulosic products may further comprise forming a pulp mixture comprising from about 1 to about 40 percent pulp from recycled materials and recycling mill sludge, and from about 99 to about 60 percent virgin pulp.