The wastewater produced in certain industries can contain a number of by-products that should not enter the natural water supply. As a result, many of these industries have their own inhouse wastewater treatment plant so that the treatment can be specifically tailored to the contaminants that their process produces. This allows them to comply with any industry-specific regulations. These treatments may include removal of toxic materials, acids and alkalis, treating brine, and removal of various solids. In some facilities, the wastewater may undergo the complete treatment process and be released back into the environment. In others, it may be partially treated, then sent to the municipal wastewater treatment plant. Although the industry and the products to be removed vary and additional steps may be necessary, the general process remains largely the same: filtration followed by aeration. Just as in a municipal wastewater treatment plant, blowers or compressors are used to provide airflow to the aeration tank. However, as the wastewater can contain different and potentially harmful chemicals, there may be different requirements for the blower or compressor, such as corrosion resistance.