Wei-Hsiang Chen 1, Wen-Ben Yang1, Chung-Shin Yuan 1,2, Jun-Chen Yang2, Qing-Liang Zhao2

  • 1 Institute of Environmental Engineering, National Sun Yat-sen University, Kaohsiung 804, Taiwan
  • 2 State Key Laboratory of Urban Water Resources and Environments (SKLUWRE), Harbin Institute of Technology, Harbin 150090, China

Received: May 11, 2012
Revised: July 26, 2012
Accepted: July 26, 2012
Download Citation: ||https://doi.org/10.4209/aaqr.2012.05.0126  

  • Download: PDF


Cite this article:
Chen, W.H., Yang, W.B., Yuan, C.S., Yang, J.C. and Zhao, Q.L. (2013). Influences of Aeration and Biological Treatment on the Fates of Aromatic VOCs in Wastewater Treatment Processes. Aerosol Air Qual. Res. 13: 225-236. https://doi.org/10.4209/aaqr.2012.05.0126


 

ABSTRACT


In this study, a lab-scale bioreactor experiment was conducted to investigate the fates of three aromatic hydrocarbons (benzene, toluene, and xylenes) in wastewater treatment processes, with respect to the differences among the species, together with the effects of aeration and the presence of activated sludge. The concentrations of the volatile organic compounds (VOCs) in the phases of air, water, and activated sludge in the bioreactor were analyzed to determine the respective chemical activities and to predict the possible transferring potentials of the VOCs among the three phases. Given appreciable levels of the VOCs being absorbed from the wastewater treatment plants (WWTPs) and their volatility, the directions of the transfers for these VOCs were from activated sludge to water and from water to air, indicating the importance of volatilization for the fates of VOCs in this reactor. The presence of activated sludge in the bioreactor had a positive effect on the transfers of the VOCs from air to water and from water to sludge, particularly for those VOCs with large octanol-water partition coefficients (KOW). The effect of aeration on the fates of the VOCs was affected by factors including the Henry’s law coefficients and KOW values of the VOCs, and the presence of activated sludge in the system. For the VOCs with large Henry’s law coefficients and small KOW values, aeration reduced the concentration of the VOCs in the air and water phases more significantly, resulting in positive and negative impacts on the volatilization and biosorption/biodegradation of the VOCs in WWTPs, respectively, which was unexpected based on the design of the WWTPs for VOC removal.


Keywords: Aromatic volatile organic compounds; Fates; Wastewater treatment; Aeration; Biological treatment


Share this article with your colleagues 

 

Subscribe to our Newsletter 

Aerosol and Air Quality Research has published over 2,000 peer-reviewed articles. Enter your email address to receive latest updates and research articles to your inbox every second week.

7.3
2022CiteScore
 
 
77st percentile
Powered by
Scopus
 
   SCImago Journal & Country Rank

2022 Impact Factor: 4.0
5-Year Impact Factor: 3.4

Aerosol and Air Quality Research partners with Publons

CLOCKSS system has permission to ingest, preserve, and serve this Archival Unit
CLOCKSS system has permission to ingest, preserve, and serve this Archival Unit

Aerosol and Air Quality Research (AAQR) is an independently-run non-profit journal that promotes submissions of high-quality research and strives to be one of the leading aerosol and air quality open-access journals in the world. We use cookies on this website to personalize content to improve your user experience and analyze our traffic. By using this site you agree to its use of cookies.