Airashell from Anua is a modular biofilter with a small footprint. The air treatment system removes a wide variety of noxious odor compounds, including more than 99 percent hydrogen sulfide, and can handle high variability in compound concentrations, according to the maker. It is prepackaged with recycled seashells, which protects the environment while reducing solid waste. The seashell media acts as a host for biological activity and a catalyst for pH neutralization. Chemicals are not required, operation is easy and life cycle costs are low. Applications include manholes, lift stations, wastewater treatment plants, sludge processing facilities, manufacturing facilities and solid waste or composting operations. 336/547-9338;

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