Case Studies of POTW Air Toxic Emission Tests and a Proposed Emission Control Strategyby H. Steve McDonald, John Carollo Engineers, Walnut Creek, United States,
Courtney C. Nicholson, John Carollo Engineers, Walnut Creek, United States,
Parivash Dezham, John Carollo Engineers, Walnut Creek, United States,
Abstract: Air toxic emissions and associated human health risk at wastewater treatment plants can be reduced with a phased implementation strategy. An evaluation of major conventional secondary wastewater treatment processes at various Publicly Owned Treatment Works (POTWs) identified the major 'bad actor' air toxic compounds, the priority and rank of wastewater treatment processes according to mass emissions, and the relative human health risk of treatment processes. This evaluation involved four POTWs, ranging from 3 to 34 million gallons per day (mgd) which serve primarily residential and light industrial communities. A phased strategy, to implement the most cost-effective air toxic emission reduction methods available, evolved based on case studies of air toxic emission tests and analyses of several POTWs, relative ranking of potentially high-risk processes, and identification of potential control technologies.
Subject Headings: Emissions | Toxicity | Health hazards | Case studies | Wastewater treatment | Industrial wastes
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