| Includes | mechanical, chemical, thermal, or biological means of controlling emission of gases and recovering vapors. 44 13 10 through 44 13 19 includes equipment employing absorption with or without chemical reaction to collect gaseous pollutants. 44 13 20 includes equipment for vacuum extraction of pollutants from an exhaust gas stream. 44 13 30 through 44 13 39 includes equipment employing adsorption with or without chemical reaction to collect gaseous pollutants. 44 13 50 through 44 13 59 includes equipment that promotes chemical oxidation of pollutants. 44 13 70 through 44 13 79 includes equipment that promotes chemical reduction (e.g., SCR for controlling emissions of nitrous oxides) reactions of pollutants. 44 13 80 through 44 13 89 includes equipment that collects gaseous pollutants by temperature reduction or pressure increase to promote condensation. 44 13 90 through 44 13 99 includes equipment that removes pollutants through biological reaction. |
| Alternate Terms/Abbreviations | selective catalytic reduction: SCR. |
| See | 43 10 00 for fans and blowers. 43 30 00 for gas purification equipment used in industrial processes. 43 32 00 for gas purification equipment associated with industrial process applications. 43 32 59 for gas purification scrubbers used in industrial applications. 44 11 00 for particulate control equipment. 44 31 21 for biological odor control equipment, including odor control biofilters and biotrickling filters. 44 31 41 for odor control vapor combustion equipment. 46 31 26 for emergency gas treatment systems associated with gas chemical feed systems. 46 53 00 for equipment for biological treatment of wastewater, including trickling filters. 46 78 00 for afterburners associated with sludge incineration. 46 78 46 for regenerative thermal oxidizers used in wastewater residuals treatment. |