Removal of naphthalene and phenanthrene using aerobic membrane bioreactor

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• 作者：Petia Mijaylova Nacheva ; Alberto Esquivel Sotelo
• 刊名：Biodegradation
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：27
• 期：2-3
• 页码：83-93
• 全文大小：573 KB
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Soil Science and Conservation
  Geochemistry
  Terrestrial Pollution
  Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
  Waste Management and Waste Technology
  
• 出版者：Springer Netherlands
• ISSN：1572-9729
• 卷排序：27

文摘

The removal of polycyclic aromatic hydrocarbons by membrane bioreactor (MBR) under aerobic conditions had been studied using naphthalene (NAP) and phenanthrene (PHE) as model compounds. Three MBRs with submerged ultra-filtration hollow fiber membranes were operated applying different operational conditions during 6.5 months. Complete NAP and PHE removal was obtained applying loads of 7 gNAP kgTSS−1 day−1 and 0.5 gPHE kgTSS−1 day−1, while the organic loading rate was adjusted to 0.26 kgCOD kgTSS−1 day−1, with the biomass concentration being 6000 mgTSS L−1, the hydraulic retention time (HRT) 8 h and the solids retention time (SRT) 30 days. Load increases, as well as HRT and SRT reductions, affected the NAP and PHE removals. Biodegradation was found to be the major NAP and PHE removal mechanism. There was no NAP accumulation in the biomass. Low PHE quantities remain sorbed in the biomass and the contribution of the sorption in the removal of this compound was estimated to be less than 0.01 %. The volatilization does not contribute to the PHE removal in MBRs, but the contribution of NAP volatilization can reach up to 0.6 % when HRT of 8 h is applied.KeywordsMembrane bioreactor (MBR)NaphthalenePhenanthrenePolycyclic aromatic hydrocarbons