Treatment of Landfill Leachates with Combined Acidification/Coagulation and The Fe0/H2O2 Process

Jan Bogacki , Piotr Marcinowski , El-Khozondar Balkess

Abstract

One of the major environmental concerns associated with waste disposal is the large amount of generated landfill leachates (LL), which are considered a type of wastewater with a complex composition. There is an urgent need to find an effective LL treatment method. LL were subjected to pretreatment followed by the Fe0/H2O2 process. Pretreatment efficiency was coagulation at pH 6.0 >> coagulation at pH 9.0 > acidification at pH 3.0. Coagulation at pH 6.0 in an optimal Fe3+ dose of 1000 mg/L decreased total organic carbon (TOC) from the initial concentration of 1061 mg/L to 491 mg/L while acidification to pH 3.0 decreased TOC to 824 mg/L. After acidification, the Fe0/H2O2 process with 8000/9200 mg/L Fe0/H2O2 reagent doses decreased TOC to 499 mg/L after a processing time of 60 min. Performance of the Fe0/H2O2 process after coagulation at pH 6.0 for optimal Fe0/H2O2 8000/5540 mg/L reagent doses decreased TOC to 268 mg/L (75% TOC removal). Treatment of landfill leachates with combined process coagulation and Fe0/H2O2 also increased their susceptibility to biodegradation, expressed as the biochemical oxygen demand/chemical oxygen demand (BOD5/COD) ratio from 0.13 to 0.43, allowing LL to be considered as susceptible to biodegradation. Fe0/H2O2 process kinetics was described. A statistical analysis confirmed the obtained results. The proposed method can be successfully applied for LL treatment.
Author Jan Bogacki (FEE / DISEQR)
Jan Bogacki,,
- Department of Informationa Science and Environment Quality Research
, Piotr Marcinowski (FEE / DISEQR)
Piotr Marcinowski,,
- Department of Informationa Science and Environment Quality Research
, El-Khozondar Balkess
El-Khozondar Balkess,,
-
Journal seriesWater, ISSN 2073-4441, (A 30 pkt)
Issue year2019
Vol11
No2, 194
Pages1-17
Publication size in sheets0.8
Keywords in EnglishLandfill leachates; wastewater treatment; advanced oxidation processes; zero‐valent iron; biodegradation
ASJC Classification2312 Water Science and Technology; 1104 Aquatic Science; 3305 Geography, Planning and Development; 1303 Biochemistry
DOIDOI:10.3390/w11020194
URL https://www.mdpi.com/2073-4441/11/2/194
Languageen angielski
Score (nominal)30
ScoreMinisterial score = 30.0, 26-04-2019, ArticleFromJournal
Ministerial score (2013-2016) = 30.0, 11-03-2019, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2017 = 1.007; WoS Impact Factor: 2017 = 2.069 (2) - 2017=2.25 (5)
Citation count*1 (2019-08-16)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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