Sludge Mate container filters from Flo Trend Systems can dewater a variety of materials such as alum, ferric, lagoon and digested sludge; septic tank, grease trap and slaughterhouse waste; wastewater residuals; and sump bottoms. The closed-system design provides total odor control, weather protection and no spillage. Units have 10-gauge reinforced walls and a seven-gauge carbon steel floor. Options include peaked roofs with gasketed bolted-down access hatches, drainage ports, inlet manifolds, floor filters and side-to-side rolling tarps. Units are available as roll-offs or trailer and tipping-stand mounted. Capacities range from 5 to 40 cubic yards. 713/699-0152; www.flotrend.com.