Environmental C&C Inc. (Scotia, N.Y.) has introduced to the composites manufacturing industry a fluid bed concentrator (FBC) system designed to remove styrene and other volatile organic compounds (VOCs) from shop air. In the system, process air from odor sources is directed to a fluidized bed adsorber. The air passes through adsorber sieve trays, fluidizing beaded activated carbon (BAC) adsorbent distributed on the trays. The mixing of beads with the contaminated air enables transfer of VOCs and odors to the adsorbent pores. The orientation of the multiple sieve trays provides counter-current VOC removal, thus optimizing efficiency. Clean air exits the adsorber top, while spent BAC collects in the bottom hopper. Heat is applied by one of several options to vaporize and separate VOCs from the adsorbent. As VOCs are released in highly concentrated form (desorbed), a low flow of carrier gas conveys the concentrate out to a final treatment device. The system reportedly is mechanically simple, with a small footprint and low weight. Features include high VOC concentration ratios that result in low energy use during final treatment as well as discrete adsorption and desorption sections that eliminate thermal cycling and energy waste. Further, the unit is compatible with existing VOC-control systems, making it simpler to expand current capacity.