The ADS 30-cubic-yard open-top roll-off dewatering unit from AQUA-Zyme Disposal Systems can be filled with 22,000 to 25,000 gallons of liquid waste at 1 to 2 percent solids in about two hours. After draining 24 hours, the unit can be hauled to a landfill or other permitted facility. Volume can be reduced by 80 percent, with reductions to 98 percent in BOD, COD, FOG and TSS. Effluent is clear and sewerable. The unit has few moving parts and includes a roll-over tarp system, side, floor and center screens, 1/4-inch floor plate, seven-gauge side plates, four door binder ratchets, eight drain ports, two inlet ports and a long-handle scraper. Units also available in 15-cubic-yard capacity. 979/245-5656; www.aqua-zyme.com.