A circular approach for landfill leachate treatment: Chemical precipitation with biomass ash followed by bioremediation through microalgae

Viegas, Catarina; Nobre, Catarina; Mota, André Luís Novais; Vilarinho, Cândida; Gouveia, Luísa; Gonçalves, Margarida

doi:10.1016/j.jece.2021.105187

Cited by 43 publications

(10 citation statements)

References 75 publications

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“…According to a study conducted by Li et al (2020), climate humidity influences the relationship between community biomass and species diversity. Consequently, relative humidity significantly impacts the formation of biomass feedstock resources (Viegas et al, 2021).…”

Section: Identification Of Barriers To Biomass Energy Developmentmentioning

confidence: 99%

Assessment of biomass energy barriers towards sustainable development: Application of Pythagorean fuzzy AHP

Shahzad

Abdul

et al. 2023

Geological Journal

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Biomass has the dual benefit of promoting economic expansion and protecting the environment. Sugarcane bagasse, animal manure, and kitchen waste are some of the sources of biomass waste that are abundant in Pakistan. However, achieving renewable energy goals while relying on Pakistani road plans is riddled with difficulties. In contrast, there is a significant research gap in examining the barriers to biomass energy development using the multiple‐criteria decision‐making technique. This study aims to fill a knowledge gap by applying the Pythagorean fuzzy analytic hierarchy process to the problem of how to overcome the barriers to expanding Pakistan's biomass power generation. The results reveal that the political and policies/institutions are the most noteworthy obstacle with a weight of 0.2281 and follow the economics and financial, meteorological, technology and infrastructure, and cultural and behavioural hurdles stand second to fifth places, respectively. In addition, the analyses demonstrate that political instability is the most important sub‐obstacle, possessing a global weight of 0.0471. According to the study's outcome, it is suggested that decision‐makers, stakeholders, and regulatory agencies coordinate their efforts to ensure the availability of appropriate incentives, boost feedstock supply, and offer locals training to speed up the Pakistan biomass industry's presently sluggish growth.

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Section: Identification Of Barriers To Biomass Energy Developmentmentioning

confidence: 99%

Assessment of biomass energy barriers towards sustainable development: Application of Pythagorean fuzzy AHP

Shahzad

Abdul

et al. 2023

Geological Journal

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“…Besides, it could enable the valorization of treatment residues (i.e. biomass and sludge) through the production of biofuels and add-value materials ( Viegas et al, 2021 ). Figure 1 depicts the performance of different leachate treatment processes according to the landfill age, that is, young, intermediate and mature.…”

Section: Lfl Managementmentioning

confidence: 99%

A review on membrane concentrate management from landfill leachate treatment plants: The relevance of resource recovery to close the leachate treatment loop

Almeida

Porto

Quintaes³

et al. 2022

Waste Manag Res

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Membrane filtration processes have been used to treat landfill leachate. On the other hand, closing the leachate treatment loop and finding a final destination for landfill leachate membrane concentrate (LLMC) – residual stream of membrane systems – is challenging for landfill operators. The re-introduction of LLMC into the landfill is typical; however, this approach is critical as concentrate pollutants may accumulate in the leachate treatment facility. From that, leachate concentrate management based on resource recovery rather than conventional treatment and disposal is recommended. This work comprehensively reviews the state-of-the-art of current research on LLMC management from leachate treatment plants towards a resource recovery approach. A general recovery train based on the main LLMC characteristics for implementing the best recovery scheme is presented in this context. LLMCs could be handled by producing clean water and add-value materials. This paper offers critical insights into LLMC management and highlights future research trends.

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“…After process optimization, microalgae biomass obtained from the remediation of an aquaculture effluent [4] and a landfill leachate [3] were subjected to the co-torrefaction process with lignocellulosic material (0, 50, and 100%) at 250 • C and 60 min, without water addition, that is, with 5% feed moisture. The aquaculture microalgae biomass was produced over 34 days in 1.5 L reactors using un effluent with 9600 mg O 2 L −1 of COD, 3266 mg N L −1 , and 23 mg P L −1 and reaching biomass productivity of 880 mg L −1 d −1 .…”

Section: Biomass Feedstocks Characterizationmentioning

confidence: 99%

“…Microalgae produced in landfill leachate usually have a high amount of ash in their biomass [3]. This occurs because these organisms tend to assimilate minerals from the environment inside their cells and landfill leachate has a high mineral concentration [71].…”

Section: Biochars From Wastewater Microalgae Biomassmentioning

confidence: 99%

“…Microalgae are efficient agents for the bioremediation of animal production effluents due to their high capacity to remove nitrogen and phosphorus, two important contributors to the chemical oxygen demand (COD) of such effluents [1][2][3]. The robustness of microalgae makes them suitable to treat recalcitrant effluents with high levels of organic or inorganic contaminants, that are difficult to remediate with aerobic or anaerobic bacteria [3][4][5]. After bioremediation, the algal biomass must be separated from the treated effluent and ideally valorized as raw material for fuels and/or specialty chemicals.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of Biochar Production by Co-Torrefaction of Microalgae and Lignocellulosic Biomass Using Response Surface Methodology

Viegas

Nobre²,

Correia

et al. 2021

Energies

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Co-torrefaction of microalgae and lignocellulosic biomass was evaluated as a method to process microalgae sludge produced from various effluents and to obtain biochars with suitable properties for energy or material valorization. The influence of four independent variables on biochar yield and properties was evaluated by a set of experiments defined by response surface methodology (RSM). The biochars were characterized for proximate and ultimate composition, HHV, and methylene blue adsorption capacity. HHV of the biochars was positively correlated with carbonization temperature, residence time, and lignocellulosic biomass content in the feed. Co-torrefaction conditions that led to a higher yield of biochar (76.5%) with good calorific value (17.4 MJ Kg−1) were 250 °C, 60 min of residence time, 5% feed moisture, and 50% lignocellulosic biomass. The energy efficiency of the process was higher for lower temperatures (92.6%) but decreased abruptly with the increase of the moisture content of the feed mixture (16.9 to 57.3% for 70% moisture). Biochars produced using algal biomass grown in contaminated effluents presented high ash content and low calorific value. Dye removal efficiency by the produced biochars was tested, reaching 95% methylene blue adsorption capacity for the biochars produced with the least severe torrefaction conditions.

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A circular approach for landfill leachate treatment: Chemical precipitation with biomass ash followed by bioremediation through microalgae

Cited by 43 publications

References 75 publications

Assessment of biomass energy barriers towards sustainable development: Application of Pythagorean fuzzy AHP

Assessment of biomass energy barriers towards sustainable development: Application of Pythagorean fuzzy AHP

A review on membrane concentrate management from landfill leachate treatment plants: The relevance of resource recovery to close the leachate treatment loop

Optimization of Biochar Production by Co-Torrefaction of Microalgae and Lignocellulosic Biomass Using Response Surface Methodology

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