Phycoremediation of landfill leachate with chlorophytes: Phosphate a limiting factor on ammonia nitrogen removal.

Paskuliakova, Andrea; Tonry, Steven; Touzet, Nicolas

doi:10.1016/j.watres.2016.04.029

Cited by 68 publications

(13 citation statements)

References 32 publications

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“…This indicates a criterion for selecting algal strain based on the waste streams to be treated. [28] evaluated 4 algal strains (Chlamydomonas sp. (strains SW13aLS and SW15aRL) and Scenedesmus sp.…”

Section: Lab-scale Studiesmentioning

confidence: 99%

“…becomes dominant when there is limited light penetration [38] or Galdieria sulphuraria thrives well under extreme acidic pH [43], making them suitable for leachate with high ammonium concentration and without any pH adjustment. The focus should be directed to such species which can grow in the leachate media similar to their natural environment, like algae from bog water can grow in dark conditions with high humic acid content [28]. To overcome high turbidity in leachate media, bioluminescent algal strains can be investigated for their leachate treatment capabilities either as standalone or in a consortium.…”

Section: Environmental Footprints Of the Process And Minimization Appmentioning

confidence: 99%

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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: Lab-scale Studiesmentioning

confidence: 99%

Section: Environmental Footprints Of the Process And Minimization Appmentioning

confidence: 99%

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

et al. 2020

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“…Even though some of these compounds are essential micronutrients in trace concentrations (e.g., metals) and can be obtained from the culture medium, they can have severe toxic effects by metabolic interference if present at high concentrations [19,20]. This sustainable depuration process has proved to be beneficial and efficient by several authors in a variety of test conditions [21,22,23,24,25,26,27] and it is now a growing area of interest in biological wastewater treatment. The fact that precursors of biofuels can be produced with these processes also makes them appealing to the biofuels industries, since they can be used as a sustainable low-cost input source of raw-materials.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen Removal from Landfill Leachate by Microalgae

Pereira

Gonçalves

Moreira

et al. 2016

IJMS

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Landfill leachates result from the degradation of solid residues in sanitary landfills, thus presenting a high variability in terms of composition. Normally, these effluents are characterized by high ammoniacal-nitrogen (N–NH4+) concentrations, high chemical oxygen demands and low phosphorus concentrations. The development of effective treatment strategies becomes difficult, posing a serious problem to the environment. Phycoremediation appears to be a suitable alternative for the treatment of landfill leachates. In this study, the potential of Chlorella vulgaris for biomass production and nutrients (mainly nitrogen and phosphorus) removal from different compositions of a landfill leachate was evaluated. Since microalgae also require phosphorus for their growth, different loads of this nutrient were evaluated, giving the following N:P ratios: 12:1, 23:1 and 35:1. The results have shown that C. vulgaris was able to grow in the different leachate compositions assessed. However, microalgal growth was higher in the cultures presenting the lowest N–NH4+ concentration. In terms of nutrients uptake, an effective removal of N–NH4+ and phosphorus was observed in all the experiments, especially in those supplied with phosphorus. Nevertheless, N–NO3− removal was considered almost negligible. These promising results constitute important findings in the development of a bioremediation technology for the treatment of landfill leachates.

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“…NH 4 + -N removal was below 70% in all the dilutions with 50% TL showing maximum removal 66.27% (Figure 2). NH 4 + -N was not fully removed from the system in all the dilutions tested and irrespective of enough nitrogen present in the medium, it was not taken up by miroalgae (Figure 2), which could be due to phosphorus P limitation, which is recently considered as rate limiting factor for NH 4 + -N removal from leachate [26]. Tam and wong [34] observed the same trend where residual ammonia (50%) gradually increased in the medium with increase in initial nitrogen concentration from 80 mg L -1 .…”

Section: Microalgal Growth and Nitrogen (Nh 4 + -N And No 3 -N) Removmentioning

confidence: 97%

“…Researchers around the world have evaluated LFL as a resource for growing microalgae coupled with nutrient removal (N, P), heavy metals and toxic organics etc. [11,[26][27][28][29]. Due to the variability in composition (nutrient load and toxicity etc.)…”

Section: Introductionmentioning

confidence: 99%

Growing Fresh Water Microalgae in High Ammonium Landfill Leachate

Khanzada¹,

Övez²

2018

AJMA

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Municipal landfills are being employed for the disposal of communities solid waste. The compacted waste in landfills naturally generate leachate (liquid) which contain high concentrations of ammonium-nitrogen NH 4 +-N along with other toxic compounds. NH 4 +-N can be used as a cheap nitrogen source for microalgae biomass production, thereby facilitating tertiary treatment of landfill leachate. Two sets of studies, laboratory scale and pilot scale open raceway pond cultivation, were conducted to evaluate the potential of indigenous fresh water microalgal species to grow in ultra-membrane treated landfill leachate TL and simultaneously remove nutrients (NH 4 +-N-NO 3 etc.). Microalgae growth was better in 50% diluted TL (1.5 gL-1 dry biomass) with 66.27% NH 4 +-N removal in the lab study. Onsite raceway pond cultivation had reduced biomass growth and nutrient removal. Nitrate-nitrogen NO 3-N removal was minimum from both the setups. Microalgal assimilation and nitrification was the main cause of NH 4 +-N removal from both the setups. When lab study duration was extended, NH 4 +-N was found to be released back into the leachate medium. Batch cultures (when prolonged) were observed to be not an effective nutrient removal strategy in terms of NH 4 +-N removal via microalgal system. Further research is needed to optimize microalgal growth and nutrient removal from landfill leachate.

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Phycoremediation of landfill leachate with chlorophytes: Phosphate a limiting factor on ammonia nitrogen removal.

Cited by 68 publications

References 32 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

Nitrogen Removal from Landfill Leachate by Microalgae

Growing Fresh Water Microalgae in High Ammonium Landfill Leachate

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