Treatment of landfill leachates with biological pretreatments and reverse osmosis

Izabela Anna Tałałaj , Paweł Biedka , Izabela Bartkowska

Abstract

Landfill leachates from municipal landfills are usually heavily contaminated and thus require treatments before direct discharge into natural waters. Selecting the appropriate technology for leachate treatment is still a major challenge for operations in municipal landfills. Biodegradation is effective for treating young leachates, whereas old leachates require processes such as chemical oxidation, coagulation–flocculation, chemical precipitation, ozonation, activated carbon adsorption, and reverse osmosis. Recently, the combination of biological pretreatments followed by physico-chemical processes has been shown to be very efficient. Here we review the efficiency of biological treatment in combination with reverse osmosis to clean landfill leachates. We studied in particular processes including a membrane bioreactor, activated sludge, a rotating biological contactor, and up-flow anaerobic sludge blanket treatments, followed by reverse osmosis. We found a 99–99.5% removal of the chemical oxygen demand (COD), and a 99–99.8% removal of N–NH4+ using reverse osmosis and activated sludge. Using reverse osmosis with a rotating biological contactor, we observed 99% removal of COD, biochemical oxygen demand and N–NH4 +. The combination of reverse osmosis, activated sludge and rotating biological contactor removed 98–99.2% of Cl−and 99–99.7% of Pb. Total suspended solids are best removed, up to 99%, by either a combination of reverse osmosis with membrane bioreactor, or reverse osmosis with activated sludge.
Author Izabela Anna Tałałaj (FCEE / DTSEE)
Izabela Anna Tałałaj,,
- Department of Technologies and Systems in Environmental Engineering
, Paweł Biedka (FCEE / DTSEE)
Paweł Biedka,,
- Department of Technologies and Systems in Environmental Engineering
, Izabela Bartkowska (FCEE / DTSEE)
Izabela Bartkowska,,
- Department of Technologies and Systems in Environmental Engineering
Journal seriesEnvironmental Chemistry Letters, ISSN 1610-3653, (N/A 100 pkt)
Issue year2019
Vol17
Pages1-17
Publication size in sheets0.8
Keywords in EnglishBiological pretreatment, Landfill, Leachate, Removal effect, Reverse osmosis
ASJC Classification2304 Environmental Chemistry
DOIDOI:10.1007/s10311-019-00860-6
URL https://link.springer.com/content/pdf/10.1007%2Fs10311-019-00860-6.pdf
Internal identifier000045033
Languageen angielski
Score (nominal)100
Score sourcejournalList
ScoreBUT score = 36.0, 17-06-2019, manual
Ministerial score = 100.0, 12-02-2020, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.2; WoS Impact Factor: 2018 = 4.617 (2) - 2018=4.522 (5)
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