Enzymatic treatment of sanitary landfill leachate

Zouboulis, Anastasios; Loukidou, Maria X.; Christodoulou, K.

doi:10.1016/s0045-6535(00)00343-x

Cited by 33 publications

(14 citation statements)

References 8 publications

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“…While the leachate strength (COD: 9095 mg L -1 ; BOD: 3114 mg L -1 ; NH 3 : 1400 mg L -1 ) was on the higher range of those reported in the literature, similar, and at times better, attenuation was achieved, albeit with the relatively lower HRT and SRT. Zouboulis et al (2001) improved the SBR performance by adding enzymes, whereby removal rates of COD, BOD, and NH 3 increased to 40, 70, and 60%, which were still lower than the efficiencies obtained in this study (47,82, and 71.4%, respectively). Although they used a notably lower strength leachate (COD: 1396 vs. 9095 mg L -1 , and NH 3 : 579 vs. 1400 mg L -1 ), Aziz et al (2011) managed to raise the COD removal from 27 to 50% with the application of the double react-settle scenario.…”

Section: Sbr Experimentscontrasting

confidence: 77%

A comparative examination of MBR and SBR performance for the treatment of high-strength landfill leachate

El‐Fadel

Hashisho

2014

Journal of the Air & Waste Management Association

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The management of landfill leachate is challenging, with relatively limited work targeting high-strength leachate. In this study, the performance of the membrane bioreactor (MBR) and sequencing batch reactor (SBR) technologies are compared in treating high-strength landfill leachate. The MBR exhibited a superior performance with removal efficiencies exceeding 95% for BOD5, TN, and NH 3 and an improvement on SBR efficiencies ranging between 21 and 34%. The coupled experimental results contribute in filling a gap toward improving the management of high-strength landfill leachate and providing comparative guidelines or selection criteria and limitations for MBR and SBR applications.Implications: While the sequencing batch reactor (SBR) technology offers some flexibility in terms of cycle time and sequence, its performance is constrained when considering landfill leachate associated with significant variations in quality and quantity. Combining membrane separation and biodegradation processes or the membrane bioreactor (MBR) technology improved removal efficiencies significantly. In the context of leachate management using the MBR technology, more efforts have targeted low-strength leachate with limited attempts at moderate to high strength leachate. In this study, the SBR and MBR technologies were tested under different operating conditions to compare and evaluate their feasibility for the management of high-strength leachate from a full-scale operating landfill. Such a comparison has not been reported for high-strength leachate.

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Section: Sbr Experimentscontrasting

confidence: 77%

A comparative examination of MBR and SBR performance for the treatment of high-strength landfill leachate

El‐Fadel

Hashisho

2014

Journal of the Air & Waste Management Association

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“…They also show the ability to remove BOD 5 and COD. The ability of these enzymes to degrade a variety of industrial pollutants, environ-mental pollutants, and leachate was also supported by the previous studies 4,28 . Ligninolytic enzymes that produced by G. australe are haemoproteins with an exceptional broad substrate spectrum that include organic and inorganic compounds.…”

Section: Discussionsupporting

confidence: 61%

“…Biological treatment is often chosen due to its reliability, simplicity, and high costeffectiveness 3 . In addition, biological processes based upon suspended-growth biomass have been proved to be effective in removing organic carbon and nutrients content 4 . However, some problems have been encountered.…”

Section: Introductionmentioning

confidence: 99%

Treatment of landfill leachate by immobilized Ganoderma australe and crude enzyme

2014

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Landfill leachate is a complex environmental problem. Here, we used immobilized Ganoderma australe and crude enzyme to treat landfill leachate. The treatment by immobilized G. australe achieved 50% and 32% removals for leachate BOD5 and COD, respectively. Totals of 58%, 57%, and 62% of BOD, COD, and NH3-N percentage removal were obtained when the leachate previously treated with immobilized G. australe was continuously treated with crude enzymes. Using a continuous treatment with crude enzymes achieves higher percentages of COD and NH3-N removal.

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“…17,223,262,266 Strong et al 223 bioaugmented atrazine-contaminated soil with a genetically engineered E. coli strain that overproduced the atrazine chlorohydrolase enzyme responsible for dechlorinating atrazine. The researchers chemically killed the genetically engineered microorganisms (GEMs) prior to addition to a field site reducing regulatory concerns.…”

Section: Bioaugmentation With Microbial-derived Materialsmentioning

confidence: 99%