Optimization of orange peel waste ensiling for sustainable anaerobic digestion

Calabrò, Paolo S.; Fazzino, Filippo; Sidari, Rossana; Zema, Demetrio Antonio

doi:10.1016/j.renene.2020.03.047

Cited by 32 publications

(24 citation statements)

References 36 publications

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“…Poveda et al (2019) reported that the microbial composition of frass depends on the diets that the mealworm T. molitor was feeding on. In contrast to the studies that reported the antimicrobial effect of specific compounds, such as phenolics in orange peels and beetroot wastes (Ruiz and Flotats, 2014;Calabrò et al, 2020), significantly higher MBC was recorded in OrF and OrBrF than the control and AD.…”

Section: Microbial Biomass and Enzyme Activitiescontrasting

confidence: 98%

The Impacts of Black Soldier Fly Frass on Nitrogen Availability, Microbial Activities, C Sequestration, and Plant Growth

Gebremikael

Wickeren

Hosseini

2022

Front. Sustain. Food Syst.

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Using insects, notably black soldier fly (BSF), is becoming one of the emerging technologies to valorize agrifood waste into high-value products, such as proteins for animal feed. Its market is expected to grow more rapidly following the new European legislation extending larvae protein use in poultry farming. The anticipated increase in larvae protein also results in a parallel increase in frass, a residue leftover after rearing the larvae and selling as a biofertilizer. Little is known about the impacts of frass made from different feedstocks used for raising the larvae on plant growth and soil quality. We set up an incubation and pot experiment to understand their effect on plant growth and soil quality and tested seven frass fertilizers made from various types of food waste and anaerobic digestate and potato pulp as reference materials using maize as a test plant. We found that the effect of frass on N availability and soil microbial quality significantly (p < 0.05) varied depending on the feedstock used for rearing the BSF larvae. N immobilization occurred up to more than 70 days, and 4–20% net N was released at the end of the 103-day-long experiment. In line with N availability dynamics, most of the frass treatments did not significantly increase the plant growth. All frasses significantly increased the microbial biomass C and enzyme activities. About 56–70% of the applied C in frass is estimated to be stable in the soil. Our data confirm that frass is a valuable product to improve soil quality but need to be applied with N sources that are readily available to avoid nutrient shortage during plant growth.

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Section: Microbial Biomass and Enzyme Activitiescontrasting

confidence: 98%

The Impacts of Black Soldier Fly Frass on Nitrogen Availability, Microbial Activities, C Sequestration, and Plant Growth

Gebremikael

Wickeren

Hosseini

2022

Front. Sustain. Food Syst.

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“…The theoretical CH4 content (expressed as a proportion of biogas volume) of butyric acid, propionic acid and ethanol are 0.63, 0.58 and 0.75 respectively [45]. Hence increased concentrations of compounds like ethanol [46] and butyric [44] are able to produce higher specific CH4 yield.…”

Section: Fermentation Profilementioning

confidence: 99%

Ensiling for anaerobic digestion: A review of key considerations to maximise methane yields

Villa

Rodriguez

Fenech

et al. 2020

Renewable and Sustainable Energy Reviews

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“…Calabrò et al (2020) examined the possibility to increase the viability of the anaerobic digestion of OPW through ensiling and subsequent treatments. It was confirmed that biomass storage allows, in the case of OPWs, the extraction of d-Limonene (with significant VS reductions) [31].…”

Section: Introductionmentioning

confidence: 79%

The Influence of the Process of Sugar Beet Storage on Its Biochemical Methane Potential

et al. 2020

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The manner of storage of sugar beets largely influences their physical and chemical properties, which may subsequently determine their biochemical methane potential. In this study, samples of fresh sugar beets as well as beets stored in two ways—in airtight conditions and in an open-air container—were tested. In both cases, measurements were taken on specific dates, i.e., after 4, 8, 16 and 32 weeks of storage. A decrease in pH was observed in all samples, with the lowest decrease occurring in hermetically stored samples. The lowest pH value of 3.71 was obtained for sugar beets stored in an open-air container after 32 weeks of storage. During storage, a gradual decrease in total solids was also recorded along with accompanying losses of organic matter, more significant in the case of storage in an open-air container. In subsequent storage periods, the biogas/methane production efficiency differed slightly for both methods. The highest volume of biogas was obtained for fresh sugar beets—148.23 mL·g−1 fresh matter (FM)—and subsequently in the 8th and 16th weeks of storage: 139.35 mL·g−1 FM (H—airtight conditions) and 144.14 mL·g−1 FM (O—open-air container), and 147.58 H mL·g−1 FM (H) and 148.22 mL·g−1 FM (O), respectively. The storage period affected the time of anaerobic decomposition of the organic matter—fresh sugar beets took the longest to ferment (26 days), while the material stored for 32 weeks took the shortest to ferment. In the experiment, the content of selected organic compounds in individual samples, i.e., sugar, methanol, ethanol, lactic acid and acetic acid, was also analysed. Within these results, significant differences were found between the samples stored using the two different methods. A high content of sugar, methanol, ethanol and other chemical compounds in the “O” materials showed the hydrolysis and acidogenesis processes taking place in an open-air container, with the participation of catalytic microorganisms.

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Optimization of orange peel waste ensiling for sustainable anaerobic digestion

Cited by 32 publications

References 36 publications

The Impacts of Black Soldier Fly Frass on Nitrogen Availability, Microbial Activities, C Sequestration, and Plant Growth

The Impacts of Black Soldier Fly Frass on Nitrogen Availability, Microbial Activities, C Sequestration, and Plant Growth

Ensiling for anaerobic digestion: A review of key considerations to maximise methane yields

The Influence of the Process of Sugar Beet Storage on Its Biochemical Methane Potential

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