Heterogeneity in the Chemical Composition of Biofertilizers, Potential Agronomic Use, and Heavy Metal Contents of Different Agro-Industrial Wastes

Cajamarca, Sabrina Magaly Navas; Martins, Denise de Souza; Silva, Juscimar da; Fontenelle, M. R.; Guedes, I. M. R.; Figueiredo, Cícero Célio de; Lima, C. E. P.

doi:10.3390/su11071995

Cited by 15 publications

(10 citation statements)

References 60 publications

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“…For the purpose of understanding the relationship between input variables, parameters and the predictive proficiency of the MONICA model, a comprehensive sensitivity analysis was conducted using an improved Morris elementary effects screening method (Fig. C1; Morris, 1991;Campolongo et al, 2007;Pujol, 2009). The algorithm demonstrates the capability to determine the importance of parameters in relatively short computing times (Campolongo et al, 2007;Confalonieri et al, 2010).…”

Section: Screening Of Variables Relevant To Soil Carbon Turnovermentioning

confidence: 99%

Evaluation and optimisation of the soil carbon turnover routine in the MONICA model (version 3.3.1)

Aiteew,

Rouhiainen,

Nendel

et al. 2024

Geosci. Model Dev.

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Abstract. Simulation models are tools commonly used to predict changes in soil carbon stocks. Prior validation is essential, however, for determining the reliability and applicability of model results. In this study, the process-based biogeochemical model MONICA (Model of Nitrogen and Carbon dynamics on Agro-ecosystems) was evaluated with respect to soil organic carbon (SOC), using long-term monitoring data from 46 German agricultural sites. A revision and parameterisation of equations, encompassing crop- and fertiliser-specific C contents and the abiotic factors of soil temperature, soil water and clay content, were undertaken and included in the model. The modified version was also used for a Morris elementary effects screening method, which confirmed the importance of environmental and management factors to the model's performance. The model was then calibrated by means of Bayesian inference, using the Metropolis–Hastings algorithm. The performance of the MONICA model was compared with that of five established carbon turnover models (CCB, CENTURY, C-TOOL, ICBM and RothC). The original MONICA model systematically overestimated SOC decomposition rates and produced on average a ∼17 % greater mean absolute error (MAE) than the other models. The modification and calibration significantly improved its performance, reducing the MAE by ∼30 %. Consequently, MONICA outperformed CENTURY, CCB and C-TOOL, and produced results comparable with ICBM and RothC. Use of the modified model allowed mostly adequate reproduction of site-specific SOC stocks, while the availability of a nitrogen, plant growth and water submodel enhanced its applicability when compared with models that only describe carbon dynamics.

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Section: Screening Of Variables Relevant To Soil Carbon Turnovermentioning

confidence: 99%

Evaluation and optimisation of the soil carbon turnover routine in the MONICA model (version 3.3.1)

Aiteew,

Rouhiainen,

Nendel

et al. 2024

Geosci. Model Dev.

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“…This increase usually occurs up to 700 °C, at which P losses start due to volatilization [14]. Compared with biochar from multiple feedstocks [19] and with other types of soil amendments [20], SSB has higher P levels, with great potential for use as a P fertilizer. Increases of Ca, Mg, S and micronutrients levels have also been reported in previous studies with SSB at 300ºC [8,17,21].…”

Section: Physical and Chemical Characteristicsmentioning

confidence: 99%

Pyrolysis of Sewage Sludge: Physical, Chemical, Morphological and Mineralogical Transformations

Fachini

Figueiredo

2022

Braz. arch. biol. technol.

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The sewage sludge (SS) use in agriculture has been limited by the Brazilian legislation to a few situations, mainly as a precautionary measure due to inorganic pollutants and pathogens. Thus, a large amount of SS has been accumulated in landfills, with no prospect of use, generating great concern for governments and society. Thermal treatment via pyrolysis has stood out as an option for SS recycling, transforming it into a carbon-rich product known as SS biochar (SSB). Biochar from SS showed good potential to be used for agricultural and environmental purposes. The present study aimed to evaluate the influence of pyrolysis at 300°C on the physical, chemical, morphological and mineralogical characteristics of SSB. In general, pyrolysis increased total carbon, total nitrogen, macro and micronutrient contents, except potassium. Pyrolysis also increased heavy metals (HMs) concentration in SSB. However, HMs values remained below the maximum limits allowed according to the legislation on SS agricultural use. X-ray analysis showed that both SS and SSB present silica (SiO2) as the main mineral. Pyrolysis also increased the SS surface area (SA) and porosity. In general, results of the present study prove showed that pyrolysis is a technological alternative to enable SS use as a sustainable input in agriculture.

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“…The amount of N, P, and K is nearly 0.45, 0.81 and 2.93 g kg −1 in biofertilizers. Rice‐husk ash, CC, and PSA contain a small amount of calcium, potassium, magnesium, etc., and eggshell powder also contains calcium, which could be an alternative source of the minerals in biofertilizers 125. Omatola and Onojah126 concluded that agricultural wastes such as rice husk can be used as chemical fertilizers, insecticides, pesticides, and so forth.…”

Section: Direct Utilization Of Agro‐wastesmentioning

confidence: 99%

Biomass as a sustainable resource for value‐added modern materials: a review

Sharma

Kaur

Punj

et al. 2020

Biofuels Bioprod Bioref

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Over the past century, the world's population has increased greatly. The growth in the population has increased the global food demand, so the food sector has increased its production. As a result of the increased production and consumption, a huge amount of agro-food waste is being generated yearly. Rice husk, wheat straw, sugarcane bagasse, corn husk, peanut shell, eggshell, are just a few examples of agro-food wastes. As these agro-food wastes and their by-products are left unused and unattended, their amount is increasing globally. It is imperative to find ways to put these wastes to environmentally viable use. These wastes find direct uses in biofertilizers, mud houses, animal feed, biofuel, and heat generation in small-scale industries, etc. After heat generation, ashes are considered as a secondary by-product, which can be used as a sustainable and renewable resource for synthesizing value-added products for various applications. This article presents a review of the traditional and advanced methods of utilizing these wastes in household applications, animal feed, fertilizers, fuel generation, pyrolysis, and for the removal of toxic metals from polluted water. These secondary resources can also be used in construction materials and for the synthesis of glasses and glass-ceramics, which can be used in bioengineering, optical, and dielectric materials. Agrofood wastes can be used as resource materials to develop modern materials with better properties instead of using minerals. This not only reduces the environment-and management-related problem of the wastes but also provides a sustainable alternative way to produce cost-effective value-added materials for the benefit of society.

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Heterogeneity in the Chemical Composition of Biofertilizers, Potential Agronomic Use, and Heavy Metal Contents of Different Agro-Industrial Wastes

Cited by 15 publications

References 60 publications

Evaluation and optimisation of the soil carbon turnover routine in the MONICA model (version 3.3.1)

Evaluation and optimisation of the soil carbon turnover routine in the MONICA model (version 3.3.1)

Pyrolysis of Sewage Sludge: Physical, Chemical, Morphological and Mineralogical Transformations

Biomass as a sustainable resource for value‐added modern materials: a review

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