Landfill leachate treatment as measured by nitrogen transformations in stabilization ponds

Martins, Cláudia Lavina; Fernandes, Heloísa; Costa, Rejane Helena Ribeiro da

doi:10.1016/j.biortech.2013.08.085

Cited by 34 publications

(15 citation statements)

References 22 publications

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“…18 as TWW replaced BG11 medium. It is consistent with the findings mentioned in another section regarding nitrogen rich medium [27][28][29] . Intracellular sugar presented high content in TWW with KWE compared to TWW without modification.…”

Section: Chlorophylls and Carbohydratessupporting

confidence: 93%

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Utilization of tannery wastewater for biofuel production: New insights on microalgae growth and biomass production

Nagi

et al. 2020

Sci Rep

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Microalgae cultivation on tannery wastewater (tWW) has been examined in some studies as a possible biological application to reduce contamination load and discharge effluents safely. However, Growth aspects, different tolerate strains and enriching the medium were not well investigated. In our study we applied Scenedesmus sp., Chlorella variabilis and Chlorella sorokiniana with different TWW concentrations. C. sorokiniana and C. variabilis cell density, chlorophyll, and sugar content grew substantially as compared to control. C. sorokiniana biomass and total lipids folded three and two times in 25% and 40% TWW, respectively as compared to control. Scenedesmus sp. showed longer lag phase and lower performance compared to the other two strains. Kelp waste extract (KWE) was added to balance the nutrients supply for C. sorokiniana, of which growth and effluents indicators were then greatly promoted in all concentrations. As the lag phase was shortened from 8 to 4 days in 60% concentration, subsequently, chlorophyll, carbohydrates, biomass and total lipids appreciated by 184%, 400%, 162% and 135%, respectively. Furthermore, the COD and ammonium removals improved by 51% and 45%, respectively. These outcomes emphasize the suitability of using TWW for microalgae cultivation with the suitable concentration while adding kelp waste extract for further enhancement.

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Section: Chlorophylls and Carbohydratessupporting

confidence: 93%

“…It was observed in ref. 28 that when nitrogen is sufficient the protein content and carbohydrates is increasing and lower lipids content are gained. The same direction confirmed in ref.…”

Section: Chlorophylls and Carbohydratesmentioning

confidence: 99%

Utilization of tannery wastewater for biofuel production: New insights on microalgae growth and biomass production

Nagi

et al. 2020

Sci Rep

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“…For nitrogen (Table 2), the pilot system removed TKN (82%) and NH 4 þ -N (84%) efficiently during period 1, with residual concentrations of TKN and NH 4 þ -N amounting to 242 and 166 mg/L, respectively. According to previous results (Martins et al, 2013), the main processes of nitrogen transformation during this period were biomass settling (64-79%), ammonia volatilization (17-27%) and algae assimilation (1-6%). Applying the artificial aeration (period 2), it was possible to obtain TKN and NH 4 þ -N removal efficiencies of 95 and 96%, respectively.…”

Section: Resultssupporting

confidence: 64%

Biodegradation and Detoxification of Sanitary Landfill Leachate by Stabilization Ponds System

Costa

Martins

Fernandes

et al. 2017

Water Environment Research

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The performance of a pilot stabilization ponds system was evaluated for the treatment of sanitary landfill leachate, focusing on effluent detoxification. Three serial ponds (anaerobic-P1, facultative-P2, and maturation-P3) were evaluated during two different operational conditions: natural condition (period 1) and 24 hours of artificial aeration in P2 (period 2). The ponds system exhibited removal efficiencies of 53% for soluble chemical oxygen demand (SCOD), 81% for filtered biochemical oxygen demand (FBOD), and 84% for NH4+-N during period 1 and 70% for SCOD, 80% for FBOD, and 96% for -N during period 2. Most metals (Fe, Cu, Cd, Zn, Cr, Ni, and Pb) and organic compounds in the leachate were significantly reduced in the treatment system, with greater reductions during period 2. Moreover, toxicity tests demonstrated the capacity of the system to reduce the toxicity of the raw leachate (up to 89% toxicity reduction).

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“…Martins et al (2013) [40] studied a pilot-scale landfill leachate treatment system utilizing a wild consortium of bacteria and microalgae where a series of three ponds and a rock filter was operated for 111 weeks with a continuous flow rate of leachate as 200 L per day. The study reported three different operation phases (I: conventional operation, II: aeration and III: aeration/recirculation) where COD removal and ammonia removal varied between 35-82% and 75-99%, respectively.…”

Section: Pilot-scale Studiesmentioning

confidence: 99%

A Review of Landfill Leachate Treatment by Microalgae: Current Status and Future Directions

et al. 2020

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Solid waste generation has been projected to increase worldwide. Presently, the most applied methodology to dispose of solid waste is landfilling. However, these landfill sites, over time release a significant quantity of leachate, which can pose serious environmental issues, including contamination of water resources. There exist many physicochemical and biological landfill leachate treatment schemes with varying degrees of success. With an increasing focus on sustainability, there has been a demand for developing eco-friendly, green treatment schemes for landfill leachates with viable resource recovery and minimum environmental footprints. Microalgae-based techniques can be a potential candidate for such a treatment scenario. In this article, research on microalgae-based landfill leachate treatments reported in the last 15 years have been summarized and critically reviewed. The scale-up aspect of microalgae technology has been discussed, and the related critical factors have been elucidated. The article also analyzes the resource recovery potential for microalgal techniques with respect to leachate treatment and explores possible methodologies to minimize the environmental footprints of the microalgae-based treatment process. The future research potential in the area has been identified and discussed.

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Landfill leachate treatment as measured by nitrogen transformations in stabilization ponds

Cited by 34 publications

References 22 publications

Utilization of tannery wastewater for biofuel production: New insights on microalgae growth and biomass production

Utilization of tannery wastewater for biofuel production: New insights on microalgae growth and biomass production

Biodegradation and Detoxification of Sanitary Landfill Leachate by Stabilization Ponds System

A Review of Landfill Leachate Treatment by Microalgae: Current Status and Future Directions

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