There was no shortage of innovative liquid waste technology at the 29th annual Pumper & Cleaner Environmental Expo International, Feb. 25-28, in Louisville, Ky. And despite concerns about a down economy, the event attracted 8,868 attendees and 3,780 companies. A total 519 exhibitors displayed the latest in vacuum trucks, dewatering technology and treatment systems, upscale restrooms and environmentally friendly deodorizers. Here’s a sampling of what attendees found on the show floor:STAINLESS STEEL TANK TRAILER Dragon Products and Industries displayed its single-compartment 7,000-gallon stainless steel tank trailer. Made of 10-gauge stainless steel, the tank features a 20-inch manhole with six hold-downs.














