Butanol, ether, toluene, and hexane, which have Henry's constants ranging from 0.0005 to 53, were used to investigate the effects of substrate solubility or availability on the removal of volatile organic compounds (VOCs) in trickle-bed biofilters. Results from this study suggest that, although removal of a VOC generally increases with a decrease in its Henry's constant, an optimal Henry's cons...

Although in water-deficient regions, agricultural runoff, drainage water or surplus irrigation is often used, there are constraints related to its quality be considered (salinity, nutrients and pollutants). Thus, it necessary treat considering the low-energy supply systems available farmers. This work focuses on a nature-based treatment system consisting of two prototypes anaerobic bioreactors ...

Biofilters are an effective air pollution control technology to break down gaseous contaminants and produce innocuous end products. This laboratory study aimed evaluate a biofilter media, mainly composed by tomato waste, as packing material reduce NH3, N2O, CO2 CH4 losses from stored pig slurry. Three mixtures of materials, with without oxalic acid, were arranged in treatments, namely: mixture ...

Biofiltration was used to eliminate volatile organic compounds from air streams in bench-scale reactors inoculated with an adapted consortium. Organic and inert supports were tested on 100 days of operation. The supports were: peat, vermiculite, a mixture of vermiculite and activated carbon, tree bark and, porous glass Rashig rings. A mixture of benzene, toluene and xylene vapors with a load of...

Nitrate in water from tile drained corn (Zea mays L.) and soybean [Glycine max (L.) Merr.] fields in the U.S. Midwest contributes to nitrate contamination of surface waters. Denitrification-based biofilters are a promising strategy for reducing nitrate concentrations, but these systems require an external carbon supply to sustain denitrification. The ability of four organic materials to serve a...