Document Type : Research Paper
Quan Cheng Environment Initiatives Sdn Bhd, Lot 1254, Jln Seelong, Felda Ulu Tebrau, Seelong, 81400 Senai, Johor, Malaysia
Universiti Teknologi Malaysia
Enviro Pioneer Solutions, 8B, Jln Seri Orkid 1, Tmn Seri Orkid, 81300 Skudai, Johor, Malaysia
Poor landfill management is always associated with environmental problems such as the discharge of leachate that does not comply with environmental regulations. In this work, we carried out a comprehensive assessment of the quality of leachate treated by four different types of commercial polymeric membranes according to the local environmental quality regulations. Our findings revealed that although the microfiltration (MF) and ultrafiltration (UF) membranes were able to exhibit significantly higher water permeability compared to the reverse osmosis (RO) and nanofiltration (NF) membranes during leachate treatment, the properties of the treated landfill leachate in terms of biochemical oxygen demand (BOD5), chemical oxygen demand (COD), color and ammoniacal nitrogen (AN) is far below the water treated by the NF/RO membranes. Furthermore, the NF/RO membranes were able to achieve a lower concentration of metallic elements as well as other parameters such as fluoride and sulfide in their permeates compared to the loose MF/UF membranes. Owing to the smallest pore size of the RO membrane, the quality of the permeate produced was the best among the membranes tested. However, a proper pretreatment process is still required before the RO membrane in order to comply with the stringent regulations of BOD5 (≤20 mg/L) and AN (≤5 mg/L).