Fungal and enzymatic treatment of mature municipal landfill leachate

Kalčíková, Gabriela; Babič, Janja; Pavko, Aleksander; Gotvajn, Andreja Žgajnar

doi:10.1016/j.wasman.2013.12.017

Cited by 52 publications

(29 citation statements)

References 25 publications

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“…In the case of raw leachate, the maximum value of MnP of 1.92 ± 1.4 U/L was similar to the activity reported by Kalčikova et al [3] in 100% mature landfill leachate. Although peroxidases have been described as the major enzymes involved in the decolorisation of leachate [10], the values observed were not positively associated with the spectra reduction of 49%.…”

Section: Discussionsupporting

confidence: 88%

“…Since humic acid and tannic acid are considered part of leachate natural recalcitrant fraction [24,25], the lack of evident COD decreases, due to a degradative process in humic treatment, is in accordance with the pattern observed in raw leachate trials. The high removal detected in tannic acid trials could be explained considering that tannic acid is an hydrolysable tannin, which would start degrading in the early phase of leachate lifecycle where the biodegradable organic matter is also utilized by microorganisms [3]. Since the landfill leachate used in this study presents the typical characterization of mature landfill leachate with the low BOD 5 /COD ratio [2], it is reasonable to expect that the concentration of refractory condensed tannins was higher than that of hydrolysable ones.…”

Section: Discussionmentioning

confidence: 84%

“…Although high variability was found in landfill leachate composition, the chemical characterization of the leachate used in this study is typical of mature and high refractory landfill leachate [3].…”

Section: Discussionmentioning

confidence: 94%

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Recalcitrant Compounds Removal in Raw Leachate and Synthetic Effluents Using the White-Rot Fungus Bjerkandera adusta

Bardi

Yuan

Tigini

et al. 2017

Water

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Recalcitrant compounds limit the efficiency of conventional biological processes for wastewater treatment, representing one of the major issues in the field. This study focused on the treatment of three effluents with White-Rot-Fungus (WRF) Bjerkandera adusta MUT 2295 in batch tests, with biomass cultivated in attached form on polyurethane foam cubes (PUFs) to test its efficiency in the removal of the target effluents' recalcitrant fraction. Treatment efficiency of B. adusta was evaluated on landfill leachate (Canada) and two solutions containing synthetic recalcitrant compounds, which were prepared with tannic and humic acid. Chemical Oxygen Demand (COD) and color removal, the production of manganese peroxidases, and the consumption of a co-substrate (glucose) were monitored during the experiment. Biological Oxygen Demand (BOD 5 ) and fungal dry weight were measured at the beginning and at the end of the experiment. After co-substrate addition, effluent COD was 2300 ± 85, 2545 ± 84, and 2580 ± 95 (mg/L) in raw leachate and tannic and humic acids, respectively. COD removal of 48%, 61%, and 48% was obtained in raw leachate and in the synthetic effluents containing tannic and humic acids, respectively. Color removal of 49%, 25%, and 42% was detected in raw leachate and in tannic and humic acid solutions, respectively. COD and color removals were associated with the increase of fungal dry weight, which was observed in all the trials. These results encourage the use of the selected fungal strain to remove tannic acid, while further investigations are required to optimize leachate and humic acid bioremediation.

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Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 84%

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Recalcitrant Compounds Removal in Raw Leachate and Synthetic Effluents Using the White-Rot Fungus Bjerkandera adusta

Bardi

Yuan

Tigini

et al. 2017

Water

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“…The flask is then incubated at 28 °C in an incubator. Usually, after 6-7 days, a dense mycelial mass is formed and the mycelial suspension is ready for further use [45]. Mycelia suspension can be used directly in the leachate treatment process or can be added to the fungi immobilization media.…”

Section: Mycelial Suspensionmentioning

confidence: 99%

Fungi in Landfill Leachate Treatment Process

Ren¹,

Yuan²

2015

Biodegradation and Bioremediation of Polluted Systems - New Advances and Technologies

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The landfill leachate has high concentration of COD, ammonia and other recalcitrant composition compounds. The amount of eachwhich is mainly largely dependent on the age of the landfill. The conventional leachate treatments can be classified as chemical-physical treatments and biological treatments. Using fungi to treat leachate is an emerging research topic. Fungi, with their excellent recalcitrant compound degradability, have been used to treat industrial wastewater that contains toxic or recalcitrant compound. Due to the complex composition and toxicity of landfill leachate, fungi have showed shown better removal efficiency in terms of COD, toxicity and color removal than the conventional leachate treatment. White rot fungi species and yeast are so far the two species that have been studied in treating landfill leachate.Future research should be extended to the other fungi species as well asand also on the impact of ammonia in landfill leachate on the fungi treatment process.

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“…Several options have been implemented to treat leachate, presenting varying degrees of efficiency. 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 .…”

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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Fungal and enzymatic treatment of mature municipal landfill leachate

Cited by 52 publications

References 25 publications

Recalcitrant Compounds Removal in Raw Leachate and Synthetic Effluents Using the White-Rot Fungus Bjerkandera adusta

Recalcitrant Compounds Removal in Raw Leachate and Synthetic Effluents Using the White-Rot Fungus Bjerkandera adusta

Fungi in Landfill Leachate Treatment Process

Treatment of landfill leachate by immobilized Ganoderma australe and crude enzyme

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