Exploring algal technologies for a circular bio-based economy in rural sector

Vishwakarma, Rashi; Dhaka, Vidushi; Ariyadasa, Thilini U.; Pant, Kamal K.

doi:10.1016/j.jclepro.2022.131653

Cited by 33 publications

(15 citation statements)

References 159 publications

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“…This contributes to a more viable way that respects the principles of the circular economy and makes microalgae industrial production feasible due to the use of reusable resources as a culture medium. The circular bio-economy process will gain value from an integrated strategy that combines CO 2 reduction, wastewater treatment, and biofertilizer generation to boost the sustainability and cost-effectiveness of microalgal farming [ 119 ].…”

Section: The Circular Economy Of Waste To Microalgae-based Biofertili...mentioning

confidence: 99%

Microalgae-Based Biotechnology as Alternative Biofertilizers for Soil Enhancement and Carbon Footprint Reduction: Advantages and Implications

et al. 2023

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Due to the constant growth of the human population and anthropological activity, it has become necessary to use sustainable and affordable technologies that satisfy the current and future demand for agricultural products. Since the nutrients available to plants in the soil are limited and the need to increase the yields of the crops is desirable, the use of chemical (inorganic or NPK) fertilizers has been widespread over the last decades, causing a nutrient shortage due to their misuse and exploitation, and because of the uncontrolled use of these products, there has been a latent environmental and health problem globally. For this reason, green biotechnology based on the use of microalgae biomass is proposed as a sustainable alternative for development and use as soil improvers for crop cultivation and phytoremediation. This review explores the long-term risks of using chemical fertilizers for both human health (cancer and hypoxia) and the environment (eutrophication and erosion), as well as the potential of microalgae biomass to substitute current fertilizer using different treatments on the biomass and their application methods for the implementation on the soil; additionally, the biomass can be a source of carbon mitigation and wastewater treatment in agro-industrial processes.

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Section: The Circular Economy Of Waste To Microalgae-based Biofertili...mentioning

confidence: 99%

Microalgae-Based Biotechnology as Alternative Biofertilizers for Soil Enhancement and Carbon Footprint Reduction: Advantages and Implications

et al. 2023

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“…188 The high costs of nutrients, harvesting, and downstream processing of a single-product-oriented model of algae-derived bioenergy cannot be the choice of a global entrepreneur. 12,189 The cost analysis of different bioenergy forms using microalgal species has been provided in Table 2. The cost of biodiesel alone produced from C. vulgaris is ∼20 times higher than the acceptable market price of petroleum-based diesel.…”

Section: Novel Routes For Integrated Production Of Bioenergy and Valu...mentioning

confidence: 99%

“…The numerous forms of algal bioenergy offers tremendous opportunities, but challenges of economic viability deter the commercial dissemination . The high costs of nutrients, harvesting, and downstream processing of a single-product-oriented model of algae-derived bioenergy cannot be the choice of a global entrepreneur. , The cost analysis of different bioenergy forms using microalgal species has been provided in Table . The cost of biodiesel alone produced from C.…”

Section: Novel Routes For Integrated Production Of Bioenergy and Valu...mentioning

confidence: 99%

Microalgal-Based Bioenergy: Strategies, Prospects, and Sustainability

2022

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The fuel crisis with the slumping reserves of fossil fuels and the exponential increase in the demand of energy necessitate a paradigm shift to a more sustainable and eco-friendly energy system. Microalgal biofuel has been recognized as one of the most prominent and versatile alternative renewable energy sources because it can be converted into a wide array of biofuels, such as biodiesel, bioethanol, bioelectricity and biogases such as syngas, methane, hydrogen, and hythane etc., with a lower carbon emission profile. To attain the economic viability of algal fuels, a collective biorefinery approach addressing both the operational and technical limitations is quintessential. The current review critically analyzes and categorizes energy aspects of microalgae through various direct and indirect approaches with the perspective of a circular economy. These approaches include complicated thermochemical and biochemical processes integrating the recovery of a wide range of value-added products apart from biofuels, thus defining a cascading approach for a multiproduct-based biorefinery model. A glimpse of recent technological advancements comprising hybrid cultivation systems, prospects of co-culturing, and the role of automated/modeling approaches in the industrial-scale production of "algal-based bioenergy" is also discussed in detail. Further, the review has also scrutinized and highlighted the developments and bottlenecks in genetic and molecular aspects of strain improvement for bioenergy production. Furthermore, the study also correlated the socioeconomic and environmental impacts of producing this green energy by evaluating the prospects and pitfalls to obtain a holistic picture on this alternative fuel for a bio-based sustainable economy.

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“…The circular bio-based economy target to reuse all types of sustainable sourced biomass and degradable waste from Frontiers in Chemical Engineering frontiersin.org many sectors and transforming it into a wide-spectrum of high value products including biofuels, biomaterials, bioactive compounds, among others (Vishwakarma et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Sustainable production of biofuels and bioderivatives from aquaculture and marine waste

et al. 2023

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The annual global fish production reached a record 178 million tonnes in 2020, which continues to increase. Today, 49% of the total fish is harvested from aquaculture, which is forecasted to reach 60% of the total fish produced by 2030. Considering that the wastes of fishing industries represent up to 75% of the whole organisms, the fish industry is generating a large amount of waste which is being neglected in most parts of the world. This negligence can be traced to the ridicule of the value of this resource as well as the many difficulties related to its valorisation. In addition, the massive expansion of the aquaculture industry is generating significant environmental consequences, including chemical and biological pollution, disease outbreaks that increase the fish mortality rate, unsustainable feeds, competition for coastal space, and an increase in the macroalgal blooms due to anthropogenic stressors, leading to a negative socio-economic and environmental impact. The establishment of integrated multi-trophic aquaculture (IMTA) has received increasing attention due to the environmental benefits of using waste products and transforming them into valuable products. There is a need to integrate and implement new technologies able to valorise the waste generated from the fish and aquaculture industry making the aquaculture sector and the fish industry more sustainable through the development of a circular economy scheme. This review wants to provide an overview of several approaches to valorise marine waste (e.g., dead fish, algae waste from marine and aquaculture, fish waste), by their transformation into biofuels (biomethane, biohydrogen, biodiesel, green diesel, bioethanol, or biomethanol) and recovering biomolecules such as proteins (collagen, fish hydrolysate protein), polysaccharides (chitosan, chitin, carrageenan, ulvan, alginate, fucoidan, and laminarin) and biosurfactants.

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Exploring algal technologies for a circular bio-based economy in rural sector

Cited by 33 publications

References 159 publications

Microalgae-Based Biotechnology as Alternative Biofertilizers for Soil Enhancement and Carbon Footprint Reduction: Advantages and Implications

Microalgae-Based Biotechnology as Alternative Biofertilizers for Soil Enhancement and Carbon Footprint Reduction: Advantages and Implications

Microalgal-Based Bioenergy: Strategies, Prospects, and Sustainability

Sustainable production of biofuels and bioderivatives from aquaculture and marine waste

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