Effect of high loading on substrate utilization kinetics and microbial community structure in super fast submerged membrane bioreactor

Sözen S., Çokgör E., Teksoy Başaran S., Aysel M., Akarsubaşi A. T., Ergal I., ...Daha Fazla

Bioresource Technology, cilt.159, ss.118-127, 2014 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 159
  • Basım Tarihi: 2014
  • Doi Numarası: 10.1016/j.biortech.2014.02.003
  • Dergi Adı: Bioresource Technology
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.118-127
  • Anahtar Kelimeler: Microbial diversity, Modeling, Process kinetics, Respirometry, Superfast membrane bioreactor
  • Çanakkale Onsekiz Mart Üniversitesi Adresli: Hayır

Özet

The study investigated the effect of high substrate loading on substrate utilization kinetics, and changes inflicted on the composition of the microbial community in a superfast submerged membrane bioreactor. Submerged MBR was sequentially fed with a substrate mixture and acetate; its performance was monitored at steady-state, at extremely low sludge age values of 2.0, 1.0 and 0.5. d, all adjusted to a single hydraulic retention time of 8.0. h. Each MBR run was repeated when substrate feeding was increased from 200. mg. COD/L to 1000. mg. COD/L. Substrate utilization kinetics was altered to significantly lower levels when the MBR was adjusted to higher substrate loadings. Molecular analysis of the biomass revealed that variable process kinetics could be correlated with parallel changes in the composition of the microbial community, mainly by a replacement mechanism, where newer species, better adapted to the new growth conditions, substituted others that are washed out from the system. © 2014 Elsevier Ltd.