Assessment of dynamic membrane filtration for biological treatment of old landfill leachate

Journal of Environmental Management
Mubbshir SaleemMaria Cristina Lavagnolo

Abstract

This study investigated the behaviour of dynamic membrane (DM) filtration for the treatment of stabilised landfill leachate in a bench-scale pre-anoxic and aerobic submerged dynamic membrane bioreactor (DMBR). Four meshes with different openings (10, 52, 85 and 200 μm) were tested to support the development of DM. Differences were observed among the meshes in supporting the development of the cake layer constituting the DM. The treatment of landfill leachate had an impact on sludge characteristics resulting in deteriorated filtration performance of the DM. Effluent turbidity was often higher than 100 NTU for larger mesh pore size (85 and 200 μm). Low effluent turbidity was achieved with meshes with 10 and 52 μm (13 ± 2 and 26 ± 4 NTU, respectively) although at membrane fluxes lower than 10 L m- 2 h-1. The bioreactor exhibited a moderate organics removal of 50-60% and an ammonia oxidation between 80 and 90%. Incomplete nitrification was observed due to increased concentrations of free ammonia and free nitrous acid, with nitrite effluent concentrations up to 1062 mgNO2--N L-1. Due to the large presence of refractory organic matter in landfill leachate, denitrification was limited resulting in a total nitrogen removal of approxima...Continue Reading

Citations

Nov 11, 2018·Environmental Science and Pollution Research International·Weiming ChenQibin Li
May 14, 2020·Journal of Environmental Health Science & Engineering·Mofizul IslamQiuyan Yuan
Mar 14, 2019·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Gabriela C B BritoWagner G Moravia
Feb 10, 2021·International Journal of Environmental Research and Public Health·Pompilio VergineAlfieri Pollice
Sep 28, 2021·Journal of the Air & Waste Management Association·Salvador VillamizarJoseph Soto

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