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Assessing an Integral Treatment for Landfill Leachate Reverse Osmosis Concentrate

Catalysts, 2020-12, Vol.10 (12), p.1389 [Peer Reviewed Journal]

2020. This work is licensed under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;ISSN: 2073-4344 ;EISSN: 2073-4344 ;DOI: 10.3390/catal10121389

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Title:
Assessing an Integral Treatment for Landfill Leachate Reverse Osmosis Concentrate
Author: Tejera, Javier ; Hermosilla, Daphne ; Miranda, Ruben ; Gascó, Antonio ; Alonso, Víctor ; Negro, Carlos ; Blanco, Ángeles
Subjects: Aluminum ; Art exhibits ; Biochemical oxygen demand ; Biodegradability ; Catalysts ; Chemical oxygen demand ; Chemical reactions ; Chloride ; Coagulation ; Color ; Efficiency ; Ferric chloride ; Flocculation ; Food waste ; Hydrogen peroxide ; Integrals ; Iron chlorides ; Landfill ; landfill leachate ; Landfills ; Leachates ; LED ; Light emitting diodes ; lime precipitation ; Magnesium ; Manganese ; Mercury (metal) ; Mercury lamps ; Mercury vapor ; Organic matter ; Oxidation ; photo-Fenton ; Pollutants ; Power consumption ; Reverse osmosis ; reverse osmosis concentrate ; Silicon ; Ultraviolet absorption ; Vacuum distillation ; Zinc
Is Part Of: Catalysts, 2020-12, Vol.10 (12), p.1389
Description: An integral treatment process for landfill leachate reverse osmosis concentrate (LLROC) is herein designed and assessed aiming to reduce organic matter content and conductivity, as well as to increase its biodegradability. The process consists of three steps. The first one is a coagulation/flocculation treatment, which best results were obtained using a dosage of 5 g L−1 of ferric chloride at an initial pH = 6 (removal of the 76% chemical oxygen demand (COD), 57% specific ultraviolet absorption (SUVA), and 92% color). The second step is a photo-Fenton process, which resulted in an enhanced biodegradability (i.e., the ratio between the biochemical oxygen demand (BOD5) and the COD increased from 0.06 to 0.4), and an extra 43% of the COD was removed at the best trialed reaction conditions of [H2O2]/COD = 1.06, pH = 4 and [H2O2]/[Fe]mol = 45. An ultra violet-A light emitting diode (UVA-LED) lamp was tested and compared to conventional high-pressure mercury vapor lamps, achieving a 16% power consumption reduction. Finally, an optimized 30 g L−1 lime treatment was implemented, which reduced conductivity by a 43%, and the contents of sulfate, total nitrogen, chloride, and metals by 90%. Overall, the integral treatment of LLROC achieved the removal of 99.9% color, 90% COD, 90% sulfate, 90% nitrogen, 86% Al, 77% Zn, 84% Mn, 99% Mg, and 98% Si; and significantly increased biodegradability up to BOD5/COD = 0.4.
Publisher: Basel: MDPI AG
Language: English
Identifier: ISSN: 2073-4344
EISSN: 2073-4344
DOI: 10.3390/catal10121389
Source: DOAJ Directory of Open Access Journals
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Assessing an Integral Treatment for Landfill Leachate Reverse Osmosis Concentrate

2020. This work is licensed under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;ISSN: 2073-4344 ;EISSN: 2073-4344 ;DOI: 10.3390/catal10121389

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