Abstract: A method of reclaiming usable products from sludge is disclosed. A predetermined level of solvent within an extractor is heated, below atmospheric boiling point, and dried sludge is immersed within the headed solvent. The solvent is a non-polar or polar aprotic solvents, such as heptane. The non-solid products, an oil/solvent mixture are separated from the solids and transferred to at least one evaporator with a concentration of between 2-25% oil in the solvent. The oil and solvent are separated in one or more evaporators to remove approximately 70%-95%, and preferably 85%-99%, of the solvent. The solids are moved to a desolventizer for removal of the residual solvent and are then dried to a moisture content of below 25%, and preferably between 10%-15%.

Abstract: A spring loaded drain cleaning device utilizing both positive and negative pressures to disrupt a clog. The invention is composed of a plastic hollow cylinder ending in an angled base cup having a gasket at its lower extremity, a cap at the top of the cylinder, a reciprocally mounted piston and a rod which permits the user to transmit forces onto the piston, and a biasing spring which acts on the piston. The user depresses the rod, causing the piston to descend down the cylinder resulting in fluidic compression in the drain above the clog, along with compression of the spring. Release of the rod results in a spring biased return of the piston up the cylinder, with an attendant negative fluidic pressure above the clog. The cycle is repeated in rapid succession until the clog clears.