Life cycle assessment of fish oil substitute produced by microalgae using food waste

Bartek, Louise; Strid, Ingrid; Henryson, Kajsa; Junne, Stefan; Rasi, Saija; Eriksson, Mattias

doi:10.1016/j.spc.2021.04.033

Cited by 48 publications

(22 citation statements)

References 90 publications

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“…They have a high value in nutrition and serve as a replacement of fish oil and fish meal. Such a process can, beside the value addition, represent a more sustainable production of these compounds for food and feed application (Bartek et al, 2021). Nevertheless, research and development to increase the cost-efficiency of coupled systems and reduce efforts for separation is a pre-requisite so that such process combinations will be applied in industrial scale.…”

Section: Discussionmentioning

confidence: 99%

Phase Separation in Anaerobic Digestion: A Potential for Easier Process Combination?

et al. 2021

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The flexibilization of bioenergy production has the potential to counteract partly other fluctuating renewable energy sources (such as wind and solar power). As a weather-independent energy source, anaerobic digestion (AD) can offer on-demand energy supply through biogas production. Separation of the stages in anaerobic digestion represents a promising strategy for the flexibilization of the fermentative part of biogas production. Segregation in two reactor systems facilitates monitoring and control of the provision of educts to the second methanogenic stage, thus controlling biogas production. Two-stage operation has proven to reach similar or even higher methane yields and biogas purities than single-stage operation in many different fields of application. It furthermore allows methanation of green hydrogen and an easier combination of material and energy use of many biogenic raw and residual biomass sources. A lot of research has been conducted in recent years regarding the process phase separation in multi-stage AD operation, which includes more than two stages. Reliable monitoring tools, coupled with effluent recirculation, bioaugmentation and simulation have the potential to overcome the current drawbacks of a sophisticated and unstable operation. This review aims to summarize recent developments, new perspectives for coupling processes for energy and material use and a system integration of AD for power-to-gas applications. Thereby, cell physiological and engineering aspects as well as the basic economic feasibility are discussed. As conclusion, monitoring and control concepts as well as suitable separation technologies and finally the data basis for techno-economic and ecologic assessments have to be improved.

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Section: Discussionmentioning

confidence: 99%

Phase Separation in Anaerobic Digestion: A Potential for Easier Process Combination?

et al. 2021

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“…By opting for recovery solutions that require few refining steps and where preferably all available material can be reused, and not only certain nutrients, a more cost-efficient side-stream valorisation process could be achieved. In terms of sustainable development, it is important that policy makers and industry do not allow short-term economic aspects to overshadow the potential environmental benefits of food waste resource recovery [46,47]. On the contrary, food waste valorisation and integrated biorefining systems are predicted to pose as key components of a circular economy and sustainable food supply chain in the 21st century [6,7].…”

Section: Discussionmentioning

confidence: 99%

“…On the contrary, food waste valorisation and integrated biorefining systems are predicted to pose as key components of a circular economy and sustainable food supply chain in the 21st century [6,7]. Producing value-added products from food waste that lower the environmental burden could justify a higher production and investment cost, especially as it also enables the transition towards more circular bioeconomy and efficient use of resources [46]. Ultimately, an efficient utilisation of agro-industrial residues and horticultural side streams could reduce both the economic and environmental impact of the food supply chain [47,48], provided that sustainable solutions are adapted and supported by policy makers, industry and consumers.…”

Section: Discussionmentioning

confidence: 99%

Environmental Assessment of Upgrading Horticultural Side Streams—The Case of Unharvested Broccoli Leaves

Eriksson

Bartek

Löfkvist³

et al. 2021

Sustainability

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To facilitate transition to a sustainable food system, it is necessary to address food losses. A large proportion of waste occurs during primary production, with large quantities of edible crop parts left in the field at harvest. One such product is broccoli, where normally only around one-third of the edible parts of the plant are harvested in Sweden. Much of the broccoli plant consists of edible leaves and this side stream represents an unused resource with great potential. This study assessed the potential environmental savings that can be achieved by utilising broccoli side streams as a powder in soups and bread. Consequential and attributional life cycle assessments were conducted, based on scenarios relevant for growers in southern Sweden. The results showed that the scenario with the largest saving potential was to process the broccoli side streams into a powder for use in broccoli soup. The main saving was due to substitution of imported broccoli powder, which was assumed to be produced from broccoli florets using a more fossil-based energy mix. The second best scenario was to use the side-stream broccoli powder as a wheat substitute in bread but, since wheat flour is less resource-demanding than imported broccoli powder, the emission savings were lower in this case. However, replacing wheat flour with a vegetable-based product could provide additional health benefits that are important in achieving a healthy, locally available, and environmentally friendly diet suitable for a sustainable food system.

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“…Few studies have reported the extraction of EPA+DHA from caught fish. Bartek et al [19] reported that environmental impacts of EPA+DHA production from microalgae are lower compared to that extracted from caught fish. In the present study, the EPA+DHA extraction from fish was considered from farmed fish rather than caught fish.…”

Section: Life Cycle Impact Assessmentmentioning

confidence: 99%

“…Depra et al [18] performed a comparative life cycle analysis of EPA+DHA production from photoautotrophic and heterotrophic modes of nutrition. Bartek et al [19] performed a life cycle assessment of DHA production from microalgae cultivated on food waste. Furthermore, the authors compared the environmental impacts of DHA production from microalgae to conventional fish oils.…”

Section: Introductionmentioning

confidence: 99%

Comparative Life Cycle Assessment of EPA and DHA Production from Microalgae and Farmed Fish

Chandra

Padamati

2021

Clean Technol.

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The present study aims at comparing the life cycle environmental impacts of polyunsaturated fatty acids production (PUFA) from microalgae and farmed fish. PUFA production from microalgae cultivated via heterotrophy and photoautotrophy was assessed and compared. The primary energy demand (PED) and environmental impacts (EI) of PUFA production from microalgae via heterotrophy were significantly lower compared to PUFA produced via photoautotrophy. Furthermore, PED and EI of PUFA production from fish farmed in marine net pens were assessed. The results indicated that the PED and EI of PUFA production from farmed fish are higher than that produced from microalgae cultivated via heterotrophy. Therefore, the results suggest that PUFA produced from microalgae via heterotrophy could substitute fish oil from an environmental perspective. Furthermore, life cycle analysis results indicate that PUFA derived from microalgae could potentially replace fish oil in the fish feed, thus reducing the pressure on oceans.

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Life cycle assessment of fish oil substitute produced by microalgae using food waste

Cited by 48 publications

References 90 publications

Phase Separation in Anaerobic Digestion: A Potential for Easier Process Combination?

Phase Separation in Anaerobic Digestion: A Potential for Easier Process Combination?

Environmental Assessment of Upgrading Horticultural Side Streams—The Case of Unharvested Broccoli Leaves

Comparative Life Cycle Assessment of EPA and DHA Production from Microalgae and Farmed Fish

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