Stripping/flocculation/membrane bioreactor/reverse osmosis treatment of municipal landfill leachate

Hasar H., Unsal S. A., Ipek U., Karatas S., Cinar O., Yaman C., ...More

JOURNAL OF HAZARDOUS MATERIALS, vol.171, pp.309-317, 2009 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 171
  • Publication Date: 2009
  • Doi Number: 10.1016/j.jhazmat.2009.06.003
  • Journal Name: JOURNAL OF HAZARDOUS MATERIALS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.309-317
  • Keywords: Leachate, Ammonia toxicity, Pretreatment, Aerobic/anoxic MBR, Reverse osmosis, BIOLOGICAL NITROGEN REMOVAL, COAGULATION-FLOCCULATION, SLUDGE PRODUCTION, AMMONIUM REMOVAL, NUTRIENT REMOVAL, WASTE-WATER, PRETREATMENT, NITRIFICATION, REACTOR, OXIDATION
  • Yıldız Technical University Affiliated: No

Abstract

This study presents a configuration for the complete treatment of landfill leachate with high organic and ammonium concentrations. Ammonia stripping is performed to overcome the ammonia toxicity to aerobic microorganisms. By coagulation-flocculation process, COD and suspended solids (SS) were removed 36 and 46%, respectively. After pretreatment, an aerobic/anoxic membrane bioreactor (Aer/An MBR) accomplished the COD and total inorganic nitrogen (total-N(i)) removals above 90 and 92%, respectively, at SRT of 30 days. Concentrations of COD and total-N(i) (not considering organic nitrogen) in the Aer/An MBR effluent decreased to 450 and 40 mg/l, respectively, by significant organic oxidation and nitrification/denitrification processes. As an advanced treatment for the leachate, the reverse osmosis (RO) was applied to the collected Aer/An MBR effluents. Reverse osmosis provided high quality effluent by reducing the effluent COD from MBR to less than 4.0 mg/l at SRT of 30 days. (C) 2009 Published by Elsevier B.V.