Stripping/flocculation/membrane bioreactor/reverse osmosis treatment of municipal landfill leachate.
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 4.0mg/l at SRT of 30 days.
Hasar
Halil
H
Department of Environmental Engineering, Faculty of Engineering, Firat University, 23119 Elazig, Turkey. hhasar@firat.edu.tr
Unsal
Sezahat A
SA
Ipek
Ubeyde
U
Karatas
Serdar
S
Cinar
Ozer
O
Yaman
Cevat
C
Kinaci
Cumali
C
D000641:Ammonia / Q000737:chemistry*; D018533:Biomass; D019149:Bioreactors; D005427:Flocculation; D006863:Hydrogen-Ion Concentration; D008567:Membranes, Artificial; D009584:Nitrogen / Q000737:chemistry; D009995:Osmosis; D010100:Oxygen / Q000737:chemistry; D012037:Refuse Disposal; D013997:Time Factors; D014865:Waste Disposal, Fluid; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods
D008567:Membranes, Artificial; D014874:Water Pollutants, Chemical; D000641:Ammonia; D009584:Nitrogen; D010100:Oxygen