Microalgal bioremediation of nitrogenous compounds in landfill leachate – The importance of micronutrient balance in the treatment of leachates of variable composition

Paskuliakova, Andrea; McGowan, Ted; Tonry, Steve; Touzet, Nicolas

doi:10.1016/j.algal.2018.03.010

Cited by 36 publications

(14 citation statements)

References 31 publications

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“…and correlate the growth and bioremediation. However, there are studies too where these parameters either show poor correlation or contrary results [34,39]. The inconsistency shows that the mechanism of algal growth is still not properly understood.…”

Section: Scaling-up Challenges and Potential Future Approachmentioning

confidence: 99%

“…However, the study lacked in terms of discussion on the effluent quality of the treated leachate with respect to COD, BOD, pH etc., which is critical for scaling up and final disposal. Paskuliakova et al (2018) [34] studied the growth and nutrient removal capacity of Chlamydomonas sp. strain SW15aRL in six different leachate samples obtained either from different landfill sites or sampled from different location and time within the same site with leachate concentration varying between 10-100%, such that total ammonia nitrogen remained within the range of 30-220 mg L −1 .…”

Section: Lab-scale Studiesmentioning

confidence: 99%

“…It is also noted that in certain cases the nutrients' impact or which of them plays limiting role is not properly understood [34]. Moreover, information on the complete nutrient requirement, their pathways/mechanism of assimilation for a species is also not fully known.…”

Section: Scaling-up Challenges and Potential Future Approachmentioning

confidence: 99%

“…By dilution, the concentration of secondary nutrients such as Fe, Mg, and Zn, etc. which is essential for algal growth is also reduced [34]. Therefore, research should focus on identifying species that can thrive in the leachate media without any significant pretreatment, e.g., Euglena sp.…”

Section: Environmental Footprints Of the Process And Minimization Appmentioning

confidence: 99%

See 3 more Smart Citations

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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Section: Scaling-up Challenges and Potential Future Approachmentioning

confidence: 99%

Section: Lab-scale Studiesmentioning

confidence: 99%

Section: Scaling-up Challenges and Potential Future Approachmentioning

confidence: 99%

Section: Environmental Footprints Of the Process And Minimization Appmentioning

confidence: 99%

See 2 more Smart Citations

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

et al. 2020

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“…Leachates contain four main components: nutrients (namely nitrogen), volatile organic compounds, heavy metals (HM) and toxic organic compounds [48][49][50]. Nitrogen in the form of NH 3 was identified as one of priority substances to be eliminated for the mitigation of leachate toxicity [51][52][53].…”

Section: Composition Of Leachatesmentioning

confidence: 99%

Landfill Impacts on the Environment—Review

2019

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Waste management (WM) is a demanding undertaking in all countries, with important implications for human health, environmental preservation, sustainability and circular economy. The method of sanitary landfilling for final disposal of waste remains a generally accepted and used method but the available scientific evidence on the waste-related environmental and health effects is not conclusive. Comparative studies of various WM methods (landfilling, incineration, composting etc.) show that among the municipal solid waste (MSW) treatment and disposal technological options, sanitary landfilling or open dumping is popular in most countries because of the relative low cost and low-technical requirement. The European Union (EU) Directive on waste landfills has introduced specific goals for reducing the volume of disposed waste and very strict requirements for landfilling and landfill sites. Evaluation of the impact of landfills on the environment is a crucial topic in the literature and has received increased attention recently, given growing environmental concerns. The main goal of this survey was to conduct a comprehensive assessment of possible impacts of MSW landfills on the environment. The main conclusion of the overall assessment of the literature is that the disposal of MSW in landfills entails a number of environmental risks but with respect to the current situation and rich style of living adopted in industrially developed countries, the idea of WM systems functioning without landfilling—at least in the foreseeable future within one generation—seems to be somewhat unreal. The results also provided important information of landfills as a source of environmental risk. Results of this research may have an important impact on landfill management and the disposal of waste. From the literature review, it is evident that even if high levels of waste avoidance, reuse and recycling are achieved, some waste materials will always need to be forwarded for disposal.

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Whey permeate as a phosphorus source for algal cultivation

Nham

Mattsson

Legrand

et al. 2023

Water Environment Research

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Microalgal cultivation for biodiesel and feed requires recycled nutrient resources for a sustainable long‐term operation. Whey permeate (WP) from dairy processing contains high organic load (lactose, oils, and proteins) and nitrogen (resources tested for microalgal cultivation) and organic phosphorus (P) that has not yet been tested as a P source for microalgal cultivation. We explored the potential of green algae strains (brackish) and polyculture (freshwater) in exploiting P from WP added to a medium based on either seawater (7 psu) or landfill leachate. Both strains showed a capacity of using organic P in WP with equal growth rates (0.94–1.12 d−1) compared with chemical phosphate treatments (0.88–1.07 d−1). The polyculture had comparable growth rate (0.25–0.57 d−1) and biomass yield (152.1–357.5 mg L−1) and similar or higher nutrient removal rate in the leachate–WP medium (1.3–6.4 mg L−1 day−1 nitrogen, 0.2–1.1 mg L−1 day−1 P) compared with the leachate–chemical phosphate medium (1.2–4.7 mg L−1 day−1 nitrogen, 0.3–1.4 mg L−1 day−1 P). This study showed that WP is a suitable P source for microalgal cultivation over a range of salinities. To date, this is the first study demonstrating that raw WP can replace mineral P fertilizer for algal cultivation. Practitioners Points Whey permeate is a comparable phosphorus source to standard fertilizers used in algal cultivation. Green algae removed phosphorus effectively from whey permeate. Microalgal cultivation is a good approach for treatment of whey permeate in combination with a nitrogen‐rich wastewater.

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Microalgal bioremediation of nitrogenous compounds in landfill leachate – The importance of micronutrient balance in the treatment of leachates of variable composition

Cited by 36 publications

References 31 publications

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

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

Landfill Impacts on the Environment—Review

Whey permeate as a phosphorus source for algal cultivation

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