Skip to main content

EMISSIONS FROM COMBUSTION SOURCES AT WASTEWATER TREATMENT PLANTS

Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

Orange County Sanitation District (OCSD) is the third largest wastewater management agency on the West Coast. It owns and operates two large wastewater treatment plants in Southern California. Plant 1 is located in Fountain Valley and currently treats an average 85–90 million gallons perday (MGD) of wastewater. Plant 2 is located in Huntington Beach and currently treats an average 150–160MGD of wastewater. Most of the digester gas produced by the anaerobic digestion of wastewater solids is burned in internal combustion engines that power generators producing the electricity to run the plants. It was shown that combustion processes (internal combustion engines, boilers, flares, emergency diesel generators and turbines) are major sources of criteria pollutants andair toxic emissions at both plants.

Under California's Air Toxics “Hot Spots” Information and Assessment Act (AB 2588), the District is required to provide South Coast Air Quality Management District (SCAQMD) with an Air Toxics Inventory Report (ATIR) and Health Risk Assessment (HRA) to fulfill the mandate of the regulation. In 2003, the ATIR which the District submitted included significant changes to the previously reported emission levels. These changes were due to issues related to source sampling data and methods used for sampling and major upgrades occurring at both plants (Liang, Farrell, Kogan, Ahn, Torres, 2005). The Strategic Plan for reduction of the toxic emissions and the corresponding health risk iscurrently been developed by OCSD staff and their consultants — Malcolm Pirnie, Inc. from White Plains, New York

An updated air toxic inventory from combustion processes at both plants that utilized alternative emissions estimation techniques was developed. Formaldehyde was found to be the compound with the largest mass emissions. These revised emissions were then used to conduct a health risk assessment(HRA). Existing available emission factors and source sampling techniques related to developing the emission inventory were major issues. Formaldehyde, diesel particulate matter and acrolein werefound to be major contributors to health risk (Kogan Ahn, Torres, Liang, Farrell, 2005).

Emissions from combustion sources are generally evaluated based on criteria pollutants standards and air toxics health effects and typically, not included in the evaluation of odor impacts associated with the wastewater treatment plant (WWTP). Some compounds in combustion source emissions, such as acetaldehyde, formaldehyde and sulfur dioxide are extremely odorous (for example, odor detection limit for acetaldehyde is several times lower than that of hydrogen sulfide). Typically, the odorous emissions from the combustion sources are not evaluated in WWTP odor control plan. In addition to providing the results of the air toxics emission inventory, this paper attempts to develop an approach to evaluating the odors associated with the combustion sources at the two WWTPs.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Data/Media
No Metrics

Document Type: Research Article

Publication date: 2006-01-01

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Learn about the many other WEF member benefits and join today
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more