Preliminary screening of agricultural feedstocks for anaerobic digestion

Palchetti, Enrico; Calamai, Alessandro; Verdi, Leonardo; Masoni, Alberto; Marini, Lorenzo; Chiaramonti, David

doi:10.13128/ahs-23633

Cited by 2 publications

(2 citation statements)

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“…Solid-separate digestate (SD) was confirmed to have a neutral-slightly alkaline pH. However, SD showed a slightly lower pH value with respect to the range from 7.3 to 8.7 reported in literature, probably due to the different digested feedstock and the adopted process parameters [30,31]. Both tested biochar types were also alkaline, in agreement with Dominugues et al [18], who observed pH values higher than 8 when using biochar derived from wood and nutrient-rich residues pyrolyzed at a temperature above 450 • C. These data confirmed biochar's ability to correct soil acidity [9].…”

Section: Effect Of Amendment Application On Soil Propertiesmentioning

confidence: 90%

“…Moreover, digestate is a nutrient-rich byproduct of the biogas anaerobic-fermentation process that is usually used as fertilizer for supplying nutrients. It can be mechanically separated into liquid (80%-90%) and solid fractions (10%-20%) in order to facilitate storage, handling, transport, and distribution [31]. Overall, studies suggested that solid-digestate-fraction application to the soil showed poor short-term fertilization effects due to the relatively slow mineralization rate, which mainly depends on the NH 4 -N pool [56,57].…”

Section: Amendment Influence On Maize Growthmentioning

confidence: 99%

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Short-Term Effects of Organic Amendments on Soil Properties and Maize (Zea maize L.) Growth

Calamai

Chiaramonti

Casini³

et al. 2020

Agriculture

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In recent years, the application of biochar as soil amendment has generated a huge interest for the preservation of soil fertility by improving the physicochemical and biological properties of soil, and for the reduction of the negative effects of greenhouse emissions (climate-change adaptation). In this study, we investigated the effect of three soil amendments, namely, biochars derived from wood (BC), solid digestate (SD), and biochar derived from solid digestate (BSD), on soil parameters and their influence in maize-growth performance. The experiment was conducted in a greenhouse where organic amendments were applied to the soil control (C) at different application rates: 0%, 1%, 2%, and 3% w/w (equivalent at 0, 10, 20, and 30 t ha−1, respectively). The results indicated that all applications of organic amendments significantly enhanced soil parameters such as pH and electrical conductivity, while only BSD and SD showed a significant increase in secondary macro-(i.e., Ca, Mg) and micronutrient-element content (i.e., Na, Fe, Mn and Zn). The best maize performance (i.e., plant height, stem diameter, biomass dry weight, seed number, and weight per ear) was observed while using BSD, while plant growth in BC had reduced results, probably due to the low presence of elemental content and the relatively high volatile-matter (VM) content, which may have altered nitrogen dynamics.

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Section: Effect Of Amendment Application On Soil Propertiesmentioning

confidence: 90%

Section: Amendment Influence On Maize Growthmentioning

confidence: 99%

Short-Term Effects of Organic Amendments on Soil Properties and Maize (Zea maize L.) Growth

Calamai

Chiaramonti

Casini³

et al. 2020

Agriculture

Self Cite

View full text Add to dashboard Cite

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Available Pathways for Operationalizing Circular Economy into the Olive Oil Supply Chain: Mapping Evidence from a Scoping Literature Review

et al. 2021

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Circular economy (CE) is increasingly seen as a promising paradigm for transitioning agri-food systems towards more sustainable models of production and consumption, enabling virtuous and regenerative biological metabolisms based on strategies of eco-efficiency and eco-effectiveness. This contribution seeks to provide a theoretical and empirical framework for operationalizing the CE principles into the olive oil supply chain, that plays a central role in the agroecological systems of the Mediterranean region. A scoping literature review has been conducted in order to identify the available pathways so far explored by scholars for reshaping the olive oil supply chain from a circular perspective. The analyzed literature has been charted on the base of the circular pathway examined, and according to the supply chain subsystem(s) to which it refers. Results are discussed highlighting the main issues, the technology readiness level of the available pathways, the prevailing approaches and knowledge gaps. A synthetic evidence map is provided, framing visually the scrutinized pathways into the Ellen MacArthur Foundation’s CE ‘butterfly’ graph. The work is intended to be a valuable baseline for inquiring how circularity can be advanced in the specific supply chain of olive oil, and which are the strategic opportunities, as well as the barriers to overcome, in order to foster the transition.

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Preliminary screening of agricultural feedstocks for anaerobic digestion

Cited by 2 publications

References 0 publications

Short-Term Effects of Organic Amendments on Soil Properties and Maize (Zea maize L.) Growth

Short-Term Effects of Organic Amendments on Soil Properties and Maize (Zea maize L.) Growth

Available Pathways for Operationalizing Circular Economy into the Olive Oil Supply Chain: Mapping Evidence from a Scoping Literature Review

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