Air pollution from industrial sources is one of the most important environmental challenges in many countries. Among known industrial sources, wastewater treatment plants (WWTPs) are one of these sources that are commonly associated with emissions of greenhouse gases (GHG) including non-methane volatile organic compounds (nMVOC), bioaerosols (pathogenic microorganisms), endotoxins, odours, and dust particles, which are all of a great concern for both the occupational workers and the nearby communities. It has been found that these pollutants can easily move to air and have direct or indirect impacts on human health as well as negative effects on the environment. Epidemiological studies also demonstrated that the occurrences of hypersensitivity diseases are often associated with exposure to the high concentration of odour and bioaerosols. Recently, it has also been reported that WWTPs are emitting up to 23% more greenhouse gas than previously thought because of fossil fuel used in the wastewater treatment process. Thus, the risk of infections, contribution to global warming potential, and deterioration of air quality that associated with WWTPs have become of importance over the last decade. Therefore, this research topic focus on 1) the emissions of GHG, odour and bioaerosols occurring in various wastewater treatment processes; 2) providing emphasis on source apportionment characterization and measurement, 3) understanding on air emission release principle, air dispersion model, and quantitative risk assessment approach.

Keywords: greenhouse gases, volatile organic compounds, bioaerosols, odours, dust particles

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