Treatment of Landfill Leachates with Combined Acidification/Coagulation and The Fe0/H2O2 Process
Jan Bogacki , Piotr Marcinowski , El-Khozondar Balkess
AbstractOne 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.
|Journal series||Water, ISSN 2073-4441, (N/A 70 pkt)|
|Publication size in sheets||0.8|
|Keywords in English||Landfill leachates; wastewater treatment; advanced oxidation processes; zero‐valent iron; biodegradation|
|ASJC Classification||; ; ;|
|Score||= 70.0, 15-01-2020, ArticleFromJournal|
|Publication indicators||= 2; = 2; = 2.0; : 2017 = 1.007; : 2018 = 2.524 (2) - 2018=2.721 (5)|
|Citation count*||2 (2020-01-26)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.