Mitigation of external costs of inorganic fertilizers with liquid fraction digestate

Aso, Sammy N.

doi:10.1007/s13399-022-02497-y

Cited by 3 publications

(5 citation statements)

References 143 publications

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“…Microbial-based fertilizers offer a solution to mitigate the environmental harm caused by excessive or improper use of chemical fertilizers, enhancing both direct and indirect plant uptake of macro-and micro-nutrients (Atieno et al, 2020). Moreover, chemical fertilizers can adversely affect the quality and safety of water, soil, and air resources, not only through their application in agriculture but also as a result of their production processes (Yin et al, 2022;Aso, 2024).…”

Section: Introductionmentioning

confidence: 99%

The potential use of brewers' spent grain-based substrates as horticultural bio-fertilizers

Bianco,

Melito,

Garau

et al. 2024

Front. Sustain. Food Syst.

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IntroductionBrewers' spent grain (BSG) is the most important by-product of breweries. Currently, the primary method of recycling BSG is through its use in livestock feed production, due to its high fiber content, non-degradable protein, and water-soluble vitamins. Nonetheless, composting, vermicomposting, and biochar production pathways offer promising alternatives for managing this organic byproduct.MethodsBSG-based substrates were evaluated as bio-fertilizers for use during the transplantation of Lactuca sativa L. and without additional fertilization at the end of the crop cycle. Biochar (B), vermicompost (V), compost (CP), and compost enriched with a microbial consortium (CPE), each mixed at 2 and 4% with peat, were compared with two control treatments: 100% peat (C1) and peat with ternary chemical fertilizer (C2). The experiment was designed with six replicates, half of which were inoculated with Sclerotinia sclerotiorum mycelium during transplantation to assess the contribution of different substrates to pathogen resistance.ResultsOverall, it was found that the control treatment C2 was the most effective, yielding the greatest plant height at the seedbed stage and the best results across all parameters at harvest. The V 4%, CP 4%, and CPE 4% treatments showed similar results without significant differences compared to the control. At the end of the seedbed phase, plants treated with CP 4% and CPE 4% exhibited the most substantial root development, with statistically significant differences from all other treatments. Moreover, the CPE 4% treatment demonstrated superior performance, resulting in statistically significant differences (p < 0.05) in the chlorophyll content (α and β) and carotenoid parameters when compared to the control treatment C2. The interaction between the treatment and the pathogen was statistically significant only for the carotenoid content in the CPE 4% treatment and for the flavonoid content in most of the treatments.DiscussionThe most promising results were obtained at the nursery phase, highlighting the potential use of processed BSG-based substrates as bio-fertilizers. These products provided plants with both a growth substrate and nutrients, effectively contributing to waste recycling and aligning with the principles of a circular economy. Additional studies are required to investigate the potential use of brewer's spent grain as bio-fertilizers in other vegetable crop species.

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Section: Introductionmentioning

confidence: 99%

The potential use of brewers' spent grain-based substrates as horticultural bio-fertilizers

Bianco,

Melito,

Garau

et al. 2024

Front. Sustain. Food Syst.

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“…Approaches of IRA and AD were discussed. AD is a wise way to recycle resources of land, nutrients (e.g., N, P, K), carbon, water, and sunlight [83,101,102,108,109,115,153,158,167,182,183]. AD converts organic matter into valuable energy carriers (e.g., biogas, biomethane, electricity, and biofertilizer) for beneficial domestic and industrial applications.…”

Section: Discussionmentioning

confidence: 99%

“…"Waste" from one process is "resource" and "input" for another. Circular bioeconomy was described as embracing wasteless design, and management tactics that recycle so-called wastes into useful goods [83,84]. One study estimated the menace imposed by linear methods on nature's worth at over one-half of global GDP (≈ US$44 trillion).…”

Section: Circular Bioeconomy To the Rescuementioning

confidence: 99%

“…Digestate is rich in plant growth macronutrients; with their quantities and micronutrients contents related to the quality of the feedstock [98,99]. Digestate attributes, AD's technical feasibilities, types of feedstocks utilized (virtually all organic matter), limitations, advantages, benefits, applications, and much more have been presented in the literature [83,96,98,[100][101][102]. AD may be now considered a mature technology that could help humanity decarbonize industries, supplant inorganic fertilizers, and address waste management shortcomings.…”

Section: Anaerobic Digestion (Ad) Technologymentioning

confidence: 99%

“…Substitution with digestate biofertilizer generated from AD operations indicated viability. In cassava root production, a liquid fraction of CPR digestate could supplant up to 28% nitrogen, 11% phosphorus, and 38% potassium sourced from chemical fertilizers for cassava root production [83]. Digestate biofertilizer, therefore, seems to be a climate change mitigator.…”

Section: Production Of Biofertilizermentioning

confidence: 99%

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Dialing Back the Doomsday Clock with Circular Bioeconomy

N. Aso

2024

From Biomass to Biobased Products

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Present day status of planet earth is perilous. In January 2023, the “Doomsday Clock” (a serving global indicator for worldwide catastrophe) crept up to 90 seconds before midnight. According to the bulletin of atomic scientists, the Doomsday Clock aims to designate humanity’s closeness to annihilation; with midnight being the instance of ignition and thus, the point of no return from Armageddon. Because 90 seconds is the closest the clock has ever been to midnight, the year 2023 is therefore, planet earth’s nearest to Armageddon. But why is planet earth perilously close to extinction? The bulletin of atomic scientists cited threats from War; Disease; Climate change; and Disruptive technologies as major contributors. In the context of climate change mitigation, this chapter attempts to present contributions of the circular bioeconomy paradigm that could help humanity to dial back the Doomsday Clock. Anaerobic digestion (AD), integrated regenerative agriculture (IRA), controlled ecological life support system (CELSS), bioregenerative life support system (BLSS), note by note cuisine (NNC), circularity, and molecular pharming are some of the solutions isolated.

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Circular economy use of biomass residues to alleviate poverty, environment, and health constraints

Aso,

Osuji,

Iwe

et al. 2023

Recycling and Sustainable Development

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Inadequate energy and water resources supply are major constraints contributing to poverty and poor health outcomes in developing economies. Low-income countries lack ready access to modern necessities such as electricity and potable water. On one hand, the scarcity of electricity and other clean energies compel reliance on traditional biomass for domestic fuels. On the other hand, harvesting firewood to meet energy needs leads to deforestation and environmental degradation. Furthermore, burning the wood for heat creates ecosystem perturbators such as toxicants, greenhouse gasses, and particulate matter. These pollutants portend adverse health concerns, including premature mortality. Globally, fine particulate matter air pollution alone causes about 3.3 million deaths annually. The contribution of this paper is to offer how circular economy targeted technologies could come to the rescue. In particular, utilizing biomass residues and wastes for briquette and pellet creation is highlighted. These densified fuel products could serve as green energies in domestic and industrial applications; and thus, help to attenuate poverty, and the adverse environmental and health consequences of traditional biomass.

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Mitigation of external costs of inorganic fertilizers with liquid fraction digestate

Cited by 3 publications

References 143 publications

The potential use of brewers' spent grain-based substrates as horticultural bio-fertilizers

The potential use of brewers' spent grain-based substrates as horticultural bio-fertilizers

Dialing Back the Doomsday Clock with Circular Bioeconomy

Circular economy use of biomass residues to alleviate poverty, environment, and health constraints

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