Decreasing environmental impact of landfill leachate treatment by MBR, RO and EDR hybrid treatment
| Autor: | Irene Jubany, José Jorge Espí, Judit Ribera-Pi, Marina Badia-Fabregat, Xavier Martínez-Lladó, F. Clarens |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Osmosis
Waste management 0208 environmental biotechnology Membranes Artificial 02 engineering and technology General Medicine 010501 environmental sciences Environment 01 natural sciences 020801 environmental engineering Pilot plant Bioreactors Environmental Chemistry Environmental science Treatment strategy Environmental impact assessment Leachate Reverse osmosis Waste Management and Disposal Filtration Water Pollutants Chemical 0105 earth and related environmental sciences Water Science and Technology |
| Zdroj: | Environmental technology. 42(22) |
| ISSN: | 1479-487X |
| Popis: | A prototype pilot plant testing for a novel complete treatment strategy for landfill leachate aimed to decrease its environmental impact was studied. Pre-treatment of leachate was performed by means of a membrane biore-actor (MBR) decreasing inorganic carbon concentration by 92 ± 8% and achieving N removals of 85%. Suspended solids removal in the MBR99.9% conditioned leachate for the next membrane step. Spiral-would reverse osmosis (RO) regenerated membranes were used to treat the MBR effluent. This RO unit achieved a global recovery of 84% along with operation and rejections of95% for most of the analyzed compounds. Since RO permeate did not meet discharge standards, promising results were obtained after a second RO pass was applied. The RO brine produced was further concentrated by an electrodialysis reversal (EDR) unit, achieving an averaged recovery of 67% throughout the operation. The average recovery of the whole pilot plant system was90%. The reduction of global brine volume together with the use of regenerated membranes are key to the environmental impact of the process and contribute to closing the loop of the circular economy. Life Cycle Assessment (LCA), performed according to ILCD Handbook guidelines, demonstrated that proposed new treatment had lower environmental impact than conventional treatments currently used in landfill facilities. Concretely, for the nine impact categories evaluated, the proposed treatment presented an average impact reduction of 93% compared to an advanced oxidation system and an average reduction of 26% when compared to a conventional RO treatment. |
| Databáze: | OpenAIRE |
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