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- Title
Performances of various hybrids systems coagulation–ultrafiltration/ nanofiltration-reverse osmosis in the treatment of stabilized landfill leachate.
- Authors
Elfilali, Nawal; Elazhar, Fatima; Dhiba, Driss; Elmidaoui, Azzedine; Taky, Mohamed
- Abstract
To assist resolve issues associated with landfills which may pose a potential environmental threat via discharge of high strength polluted wastewater known as leachate, because of the huge amount of municipal solid waste dumped into landfills. A chain of processes for treating stabilized leachate or landfill leachate (LFL) at laboratory-scale and low costs will be investigated. The treatment system consists of the integration of ultrafiltration (UF) membrane process with coagulation method (Coag-UF) as pretreatment step for treating LFL using a dual nanofiltration (NF) and reverse osmosis (RO) system with the main objective to achieve the Moroccan discharge limits. The results show that the combination of Coag-UF, using ferric chloride FeCl3 as a coagulant, has allowed a significant reduction of LFL pollutants, namely 62% for chemical oxygen demand, 89% for total suspended solids and 62% for iron (Fe) while reducing the fouling phenomena. Also, the results indicate that the Coag-UF/NF/RO hybrid system is able to produce quality water according to directive FAO and water reuse standard for irrigation, land watering in Morocco, with an overall water recovery up to 57.2%, a salt rejection reaches 99% and a low energy cost (0.0019 US $/m3) compared to the two others hybrid systems Coag-UF/RO and Coag-UF/NF which their energy cost are 0.0044 and 0.0032 US $/m3, respectively.
- Subjects
MOROCCO; REVERSE osmosis; HYBRID systems; LEACHATE; LANDFILLS; REVERSE osmosis process (Sewage purification); TOTAL suspended solids; OSMOSIS
- Publication
Desalination & Water Treatment, 2022, Vol 257, p55
- ISSN
1944-3994
- Publication type
Article
- DOI
10.5004/dwt.2022.28360