Optimising a solvent system for lipid extraction from cyanobacterium Microcystis spp.: future perspective for biodiesel production

Madusanka, D.A.T.; Manage, P.M.

doi:10.4038/jnsfsr.v46i2.8422

Cited by 5 publications

(4 citation statements)

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“…Cyanobacteria provide protection to crops against bacteria, insects, and other organisms due to their antimicrobial, allelochemical, and antioxidant properties (Gonçalves, 2021). Free fatty acids (FFAs) derived from cyanobacteria are extensively explored for biodiesel production (Madusanka and Manage, 2018). Polysaccharides have a preponderant role in the improvement of soil quality, with major properties like soil conditioner, nutrient carrier, and a safe release of agrochemicals.…”

Section: Production Of Secondary Metabolitesmentioning

confidence: 99%

Phytostimulants in sustainable agriculture

Bano

Waqar

Asadullah³

et al. 2022

Front. Sustain. Food Syst.

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The consistent use of synthetic fertilizers and chemicals in traditional agriculture has not only compromised the fragile agroecosystems but has also adversely affected human, aquatic, and terrestrial life. The use of phytostimulants is an alternative eco-friendly approach that eliminates ecosystem disruption while maintaining agricultural productivity. Phytostimulants include living entities and materials, such as microorganisms and nanomaterials, which when applied to plants or to the rhizosphere, stimulate plant growth and induce tolerance to plants against biotic and abiotic stresses. In this review, we focus on plant growth-promoting rhizobacteria (PGPR), beneficial fungi, such as arbuscular mycorrhizal fungi (AMF) and plant growth-promoting fungi (PGPF), actinomycetes, cyanobacteria, azolla, and lichens, and their potential benefits in the crop improvement, and mitigation of abiotic and biotic stresses either alone or in combination. PGPR, AMF, and PGPF are plant beneficial microbes that can release phytohormones, such as indole acetic acid (IAA), gibberellic acid (GA), and cytokinins, promoting plant growth and improving soil health, and in addition, they also produce many secondary metabolites, antibiotics, and antioxidant compounds and help to combat biotic and abiotic stresses. Their ability to act as phytostimulator and a supplement of inorganic fertilizers is considered promising in practicing sustainable agriculture and organic farming. Glomalin is a proteinaceous product, produced by AMF, involved in soil aggregation and elevation of soil water holding capacity under stressed and unstressed conditions. The negative effects of continuous cropping can be mitigated by AMF biofertilization. The synergistic effects of PGPR and PGPF may be more effective. The mechanisms of control exercised by PGPF either direct or indirect to suppress plant diseases viz. by competing for space and nutrients, mycoparasitism, antibiosis, mycovirus-mediated cross-protection, and induced systemic resistance (ISR) have been discussed. The emerging role of cyanobacterial metabolites and the implication of nanofertilizers have been highlighted in sustainable agriculture.

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Section: Production Of Secondary Metabolitesmentioning

confidence: 99%

Phytostimulants in sustainable agriculture

Bano

Waqar

Asadullah³

et al. 2022

Front. Sustain. Food Syst.

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“…It is critical for the biodiesel sector to continually enhance the elements that will enhance the opportunities for stronger market penetration to attempt for the solving of the financial disadvantages. 73 A successful option originated for lipid biodiesel-convertibles is microalgae. Several photosynthetic bacteria that can store large quantities of lipid—up to 50% of dry tissue weight are available in certain species.…”

Section: Applications Of Renewable Energy From Biomass Wastesmentioning

confidence: 99%

Trends and advances in bioenergy production and sustainable solid waste management

Ks¹,

Ramya

Varjani

2019

Energy & Environment

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Renewable energy accounts for 33 percent of the primary energy consumption across the world. Current world faces a major waste and climate change crisis. In many developing countries, over the past two and a half centuries, a variety of renewable power techniques have been actively pursued in distinct fields in the fields of research, growth, demonstration, manufacturing, and implementation. A replacement for fossil fuels using waste biomass is essential and considered as a promising strategy to meet our energy needs. At the same time, the emissions of greenhouse gas and managing municipal solid waste have to become crucial due to growing population demand. Biomass includes the energy stored in the sun and plants. It also serves as a primary energy source. Plants absorb the power of the sun during the process called photosynthesis. When biomass is combusted, chemical energy can be released into biomass as heat that can be used for domestic applications. The use of biomass results in management expenses contributes to climate changes, decrease the risk to lives and assets thereby ensure a safe and competitive energy source for the beneficial impact on the environment and the economy. This paper overviews about various applications of renewable energy sources produced from the municipal wastes and microbes. Prospects for the commercialization of bio-algal fuels, applications, and its challenges are discussed. The role of microbes (microalgae) in the energy production process and to use bioenergy as a future trend for economic development is discussed.

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“…Total world energy supply via fossil fuels (oil, coal, and gas) represents 80% of energy sources, followed by renewables and nuclear energy; 18% and 2% respectively (WBA Global Bioenergy Statistics, 2018). Since fossil fuel is non-renewable and finite in quantity, scientists found that fossil fuel reserves of oil, natural gas, and coal will be depleted in approximately 35, 37, and 107 years respectively (Madusanka & Manage, 2018). Therefore, the world is moving towards renewable energies such as biofuel (Madusanka & Manage, 2018), hydropower (Balkhair & Rahman, 2017), wind (Zeng et al 2019), tidal and waves (Niegel, 2018), and Ocean Thermal Energy Conversion (OTEC) (Ahmadi, Dincer & Rosen, 2015), etc.…”

Section: Introductionmentioning

confidence: 99%

“…Since fossil fuel is non-renewable and finite in quantity, scientists found that fossil fuel reserves of oil, natural gas, and coal will be depleted in approximately 35, 37, and 107 years respectively (Madusanka & Manage, 2018). Therefore, the world is moving towards renewable energies such as biofuel (Madusanka & Manage, 2018), hydropower (Balkhair & Rahman, 2017), wind (Zeng et al 2019), tidal and waves (Niegel, 2018), and Ocean Thermal Energy Conversion (OTEC) (Ahmadi, Dincer & Rosen, 2015), etc. due to having lower environmental impacts, Bandara, 2019) carried out in Sri Lanka regarding bioethanol production through the biological pathway and cost-effective processes for converting cellulosic biomass to fuels are yet to be fully realized.…”

Section: Introductionmentioning

confidence: 99%

Isolation and Identification of Cellulase Producing and Sugar Fermenting Bacteria for Second-Generation Bioethanol Production

Weerasinghe

Madusanka

Manage

2021

Int. J. Renew. Energy Dev.

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Over the last decades, the negative impacts of fossil fuel on the environment and increasing demand for energy due to the unavoidable depletion of fossil fuels, has transformed the world’s interests towards alternative fuels. In particular, bioethanol production from cellulosic biomass for the transportation sector has been incrementing since the last decade. The bacterial pathway for bioethanol production is a relatively novel concept and the present study focused on the isolation of potential “cellulase-producing” bacteria from cow dung, compost soil, and termite gut and isolating sugar fermenting bacteria from palm wine. To select potential candidates for cellulase enzyme production, primary and secondary assays were conducted using the Gram’s iodine stain in Carboxy Methyl Cellulose (CMC) medium and the Dinitrosalicylic acid (DNS) assays, respectively. Durham tube assay and Solid-Phase Micro-Extraction (SPME) coupled with Gas Chromatography-Mass Spectrometry (GC-MS) was used to evaluate the sugar fermenting efficiency of the isolated bacteria. Out of 48 bacterial isolates, 27 showed cellulase activity where Nocardiopsis sp. (S-6) demonstrated the highest extracellular crude enzyme activity of endoglucanase (1.56±0.021 U) and total cellulase activity (0.93±0.012 U). The second-highest extracellular crude enzyme activity of endoglucanase (0.21±0.021 U) and total cellulase activity (0.35±0.021 U) was recorded by Bacillus sp. (T-4). Out of a total of 8 bacterial isolates, Achromobacter sp. (PW-7) was positive for sugar fermentation resulting in 3.07% of ethanol in broth medium at 48 h incubation. The results of the study revealed that Nocardiopsis sp. (S-6) had the highest cellulase enzyme activity. However, the highest ethanol percentage was achieved with by having both Bacillus sp. (T-4) and Achromobacter sp. (PW-7) for the simultaneous saccharification and fermentation (SSF) method, as compared to separate hydrolysis and fermentation (SHF) methodologies.

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Optimising a solvent system for lipid extraction from cyanobacterium Microcystis spp.: future perspective for biodiesel production

Cited by 5 publications

References 0 publications

Phytostimulants in sustainable agriculture

Phytostimulants in sustainable agriculture

Trends and advances in bioenergy production and sustainable solid waste management

Isolation and Identification of Cellulase Producing and Sugar Fermenting Bacteria for Second-Generation Bioethanol Production

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