Effects of partial maize silage substitution with microalgae on viscosity and biogas yields in continuous AD trials

Gruber-Brunhumer, M.R.; Montgomery, L.F.R.; Nussbaumer, M.; Schoepp, T.; Zohar, E.; Muccio, M.; Ludwig, Iziar A.; Bochmann, Günther; Fuchs, Werner; Drosg, B.

doi:10.1016/j.jbiotec.2019.02.004

Cited by 9 publications

(2 citation statements)

References 23 publications

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“…These values are comparable to maize silage (340-360 Nm 3 t −1 VS), a commonly used feedstock for biogas production [83]. The digestion of microalgae together with other substrates (co-digestion) has been investigated in various studies [82,84,85], and positive synergies are formed (e.g., improved C/N ratio, reduced viscosity) [82,84]. However, there are seasonal variations in the availability and composition of microalgal biomass and co-substrates that affect biogas yield.…”

Section: Bioenergy Productionmentioning

confidence: 88%

Digestate as Sustainable Nutrient Source for Microalgae—Challenges and Prospects

et al. 2021

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The interest in microalgae products has been increasing, and therefore the cultivation industry is growing steadily. To reduce the environmental impact and production costs arising from nutrients, research needs to find alternatives to the currently used artificial nutrients. Microalgae cultivation in anaerobic effluents (more specifically, digestate) represents a promising strategy for increasing sustainability and obtaining valuable products. However, digestate must be processed prior to its use as nutrient source. Depending on its composition, different methods are suitable for removing solids (e.g., centrifugation) and adjusting nutrient concentrations and ratios (e.g., dilution, ammonia stripping). Moreover, the resulting cultivation medium must be light-permeable. Various studies show that growth rates comparable to those in artificial media can be achieved when proper digestate treatment is used. The necessary steps for obtaining a suitable cultivation medium also depend on the microalgae species to be cultivated. Concerning the application of the biomass, legal aspects and impurities originating from digestate must be considered. Furthermore, microalgae species and their application fields are essential criteria when selecting downstream processing methods (harvest, disintegration, dehydration, product purification). Microalgae grown on digestate can be used to produce various products (e.g., bioenergy, animal feed, bioplastics, and biofertilizers). This review gives insight into the origin and composition of digestate, processing options to meet requirements for microalgae cultivation and challenges regarding downstream processing and products.

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Section: Bioenergy Productionmentioning

confidence: 88%

Digestate as Sustainable Nutrient Source for Microalgae—Challenges and Prospects

et al. 2021

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“…Biogas from wastes or energy crops to produce electricity or thermal heat is an alternative to reduce anthropogenic fossil fuel born CO 2 emissions [9].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Biological Degradability of the Waste Produced by Food Industry

Samešová

Poništ

Hybská

et al. 2021

Ecological Chemistry and Engineering S

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Organic waste from production processes is unutilised potential for the production of energy from renewable sources. The submitted paper studies the conditions of anaerobic degradation of selected waste from food industry (diary and distillery) when biogas is produced. Both types of organic waste have low pH values. Ash form municipal incineration as a material for the treatment of pH of waste was used. Except for the pH increase during anaerobic degradation, ash also serves as a source of macroelements for inoculum microorganisms. Kinetics of anaerobic biological digestion of organic material based on the change of pressure and biogas production depending on the ash addition (change of pH) of input samples was observed. Beside these tests, degradability of the waste was assessed by limiting biologically degradable ratio, BR and specific speed of degradability, q. pH values were adjusted with different amounts of ash (0.5; 1.8; 2.7 g/g of dry matter of organic material). Results of the research confirmed that the addition of optimum amount of ash has a positive effect on anaerobic degradation of organic materials.

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Biogas from Microalgae: Production Approaches and Strategies for Process Optimization

Costa

Bezerra

Moreira

et al. 2022

Role of Microbes in Industrial Products and Processes

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Effects of partial maize silage substitution with microalgae on viscosity and biogas yields in continuous AD trials

Cited by 9 publications

References 23 publications

Digestate as Sustainable Nutrient Source for Microalgae—Challenges and Prospects

Digestate as Sustainable Nutrient Source for Microalgae—Challenges and Prospects

Assessment of Biological Degradability of the Waste Produced by Food Industry

Biogas from Microalgae: Production Approaches and Strategies for Process Optimization

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