Determining the Biodegradability of Leachate Through XAD-8 Adsorption

Zhang, Yuanyuan; Liu, Jianguo; Li, Rui; Zeng, Xianwei; Yang, Xue; Liu, Juan; Nie, Yong

doi:10.1016/j.proenv.2012.10.002

Cited by 7 publications

(2 citation statements)

References 20 publications

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“…Depending upon both landfill composition and age, leachate contains different organic fractions. In mature landfills, humic and fulvic acids comprise over 60% of the organic matter [46]. These compounds are characterized by their intense dark color.…”

Section: Effect Of Landfill Leachates On Algae Growthmentioning

confidence: 99%

Phycoremediation of Landfill Leachate with Desmodesmus subspicatus: A Pre-Treatment for Reverse Osmosis

Kholomyeva

Vurm

Tajnaiová

et al. 2020

Water

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Reverse osmosis is widely used as one of the most effective and advanced technologies for the treatment of leachate from landfill sites. Unfortunately, high leachate contamination—above all, ammonia nitrogen—affects membrane selectivity and is reflected in permeate quality. Furthermore, iron contained in leachate can facilitate chelates forming, which reduces the membrane anti-fouling capacity. The addition of a pre-treatment step could alleviate the adverse impact of the pollutants. As such, we investigated pollutant removal by phycoremediation. Initial ecotoxicity tests of three algal strains (Scenedesmus obliquus (S. obliquus), Desmodesmus subspicatus (D. subspicatus), and Chlorella vulgaris (C. vulgaris)) identified D. subspicatus as the strain most tolerant to leachate toxicity. Subsequently, D. subspicatus was cultivated in six landfill leachates of different origin and, after the cultivation, removal rates were determined for ammonia nitrogen and iron. Furthermore, the impact of input leachate parameters on remediation efficiency was also investigated. By phycoremediation, the reduction of up to 100% in iron and 83% in ammonia nitrogen load was achieved, which demonstrates the high potential of microalgae to mitigate environmental risks and reduce membrane foulant content.

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Section: Effect Of Landfill Leachates On Algae Growthmentioning

confidence: 99%

Phycoremediation of Landfill Leachate with Desmodesmus subspicatus: A Pre-Treatment for Reverse Osmosis

Kholomyeva

Vurm

Tajnaiová

et al. 2020

Water

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“…The ratio of biological oxygen demand (BOD5) to chemical oxygen demand (COD) is a commonly used indicator of leachate biodegradability [12]. Based on the landfill age, the BOD5/COD ratio can vary from 0.4 in young (less than 5 years old), to < 0.2 in medium (5-10 years old), and 0.1 in old (>10 years old) leachates [13,14].…”

Section: Introductionmentioning

confidence: 99%

Assessment of landfill leachate biodegradability and treatability by means of allochthonous and autochthonous biomasses

et al. 2020

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The biodegradability and treatability of a young (3 years old) municipal landfill leachate was evaluated by means of chemical oxygen demand (COD) fractionation tests, based on respirometric techniques. The tests were performed using two different biomasses: one cultivated from the raw leachate (autochthonous biomass) and the other collected from a conventional municipal wastewater treatment plant after its acclimation to leachate (allochthonous biomass). The long term performances of the two biomasses were also studied. The results demonstrated that the amount of biodegradable COD in the leachate was strictly dependent on the biomass that was used to perform the fractionation tests. Using the autochthonous biomass, the amount of biodegradable organic substrate resulted in approximately 75% of the total COD, whereas it was close to 40% in the case of the allochthonous biomass, indicating the capacity of the autochthonous biomass to degrade a higher amount of organic compounds present in the leachate. The autochthonous biomass was characterized by higher biological activity and heterotrophic active fraction (14% vs 7%), whereas the activity of the allochthonous biomass was significantly affected by inhibitory compounds in the leachate, resulting in a lower respiration rate (SOUR = 13 mg O2 gVSS-1 h-1 vs 37 mg O2 gVSS-1 h-1). The long-term performance of the autochthonous and allochthonous biomasses indicated that the former was more suitable for the treatment of raw landfill leachate, ensuring higher removal performance towards the organic pollutants.

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Numerical modeling and simulation of leachate transport in MSW contaminated soil: Impact on seasonal changes

et al. 2022

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Determining the Biodegradability of Leachate Through XAD-8 Adsorption

Cited by 7 publications

References 20 publications

Phycoremediation of Landfill Leachate with Desmodesmus subspicatus: A Pre-Treatment for Reverse Osmosis

Phycoremediation of Landfill Leachate with Desmodesmus subspicatus: A Pre-Treatment for Reverse Osmosis

Assessment of landfill leachate biodegradability and treatability by means of allochthonous and autochthonous biomasses

Numerical modeling and simulation of leachate transport in MSW contaminated soil: Impact on seasonal changes

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