Effect of Volume Loading Rate and C/N on Ship Domestic Sewage Treatment by Two Membrane Bioreactors

  • Yuhang Cai College of Power and Energy Engineering, Harbin Engineering University, P.O.Box 150001, Harbin, Heilongjiang Province, China
  • Asad A. Zaidi Department of Engineering Sciences, PN Engineering College, National University of Sciences and Technology, P.O.Box 75350, Karachi, Pakistan
  • Peiqi Sun College of Power and Energy Engineering, Harbin Engineering University, P.O.Box 150001, Harbin, Heilongjiang Province, China
  • Yue Shi College of Power and Energy Engineering, Harbin Engineering University, P.O.Box 150001, Harbin, Heilongjiang Province, China
  • Kun Zhang College of Power and Energy Engineering, Harbin Engineering University, P.O.Box 150001, Harbin, Heilongjiang Province, China
  • Aqiang Lin College of Power and Energy Engineering, Harbin Engineering University, P.O.Box 150001, Harbin, Heilongjiang Province, China

Abstract

Design of ship sewage treatment systems that not only satisfy the use of small space on board but also meets International Maritime Organisation (IMO) latest emission standards is still a challenging problem for ship industry. This study provides a comparative disquisition between two different MBR reactors i.e, air-lift multilevel circulation membrane reactor (AMCMBR) and anaerobic/anoxic/aerobic membrane reactor (AOA-MBR) for domestic sewage treatment. The influence of pollutants volume loading rate (VLR) and C/N on effluent chemical oxygen demand (COD), ammonium nitrogen (NH4+-N) and TN for marine domestic sewage was analyzed. The results revealed that AMCMBR showed better removal efficiencies for COD and TN than AOA-MBR. The volume of AMCMBR was only half of the AOA-MBR. In addition, high average value of mixed liquor volatile suspended solids (MLVSS)/mixed liquid suspended solids (MLSS) (i.e. 0.75) of AMCMBR indicated high biomass and good pollutants removal achieved by this reactor. An interesting phenomenon was found in the study regarding Urease activity for the two reactors. Urease activity for AMCMBR in different working conditions all exceeded AOA-MBR and there exist no clear difference of NR activities between AMCMBR and AOA-MBR except for low C/N ratio (i.e. 6 and 4). This phenomenon proved that AMCMBR has a greater performance for treating ship domestic wastewater.

Keywords: air-lift multilevel circulation membrane reactor, anaerobic/anoxic/aerobic membrane reactor, marine domestic sewage, C/N, pollutants volume loading rate, IMO, Urease
Published online
2019-12-08
How to Cite
[1]
Cai, Y., Zaidi, A., Sun, P., Shi, Y., Zhang, K. and Lin, A. ONLINE. Effect of Volume Loading Rate and C/N on Ship Domestic Sewage Treatment by Two Membrane Bioreactors. Periodica Polytechnica Chemical Engineering. (ONLINE). https://doi.org/10.3311/PPch.14672.
Section
Articles