Effect of biochar addition on the improvement of the quality parameters of compost used for land reclamation

Raclavská, Helena; Růžičková, Jana; Raclavský, Konstantin; Juchelková, Dagmar; Kucbel, Marek; Švédová, Barbora; Slamová, Karolina; Kacprzak, M.

doi:10.1007/s11356-021-16409-6

Cited by 8 publications

(17 citation statements)

References 85 publications

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“…This effect of different compounds can be observed through the presence of preserved and formed nitrogenous functional groups during pyrolysis, which can conduct electricity due to their electron donation or acceptance capacity in reaction centers. Examples of these groups present in biochar include amines (NH 2 ), imines (NH), nitro groups (NO 2 ), pyridinic, and pyrazinic groups [16,21,27,39,40,44]. The effect of N-rich groups with high EC was evident in our study, especially in CH-derived biochar, which showed lower N loss, i.e., preserved higher N content in the biochar.…”

Section: Discussionmentioning

confidence: 58%

“…The positive relationship between total N and C contents is explained by the presence of pyrolytic carbon, which has a porous structure capable of adsorbing molecules, including nitrogenous compounds produced during pyrolysis [3,16,21,39,40,43,44]. Furthermore, when N is adsorbed onto pyrolytic C, additional polymerization or condensation reactions occur between N and C atoms, creating favorable conditions for the formation of nitrogenous compounds with closed chains, thus preserving N during pyrolysis [3,16,21,39,40,43,44]. Among these N compounds are the formation of pyrazine and pyridine and the formation of other heterocyclic compounds, such as pyrazole (Figure 5) [39,40,44].…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, when N is adsorbed onto pyrolytic C, additional polymerization or condensation reactions occur between N and C atoms, creating favorable conditions for the formation of nitrogenous compounds with closed chains, thus preserving N during pyrolysis [3,16,21,39,40,43,44]. Among these N compounds are the formation of pyrazine and pyridine and the formation of other heterocyclic compounds, such as pyrazole (Figure 5) [39,40,44]. Despite the C and N correlation, obtaining reliable measures of these elements in biochar is expensive and time-consuming.…”

Section: Discussionmentioning

confidence: 99%

“…All statistical analyses were performed using the R software version 4.3.1 with the following packages: stats; base; tidyverse; agricolae; factoextra; FactoMineR; and corrplot [34][35][36][37][38]. The dataset of the total N content, N loss, and EC value was adjusted to different nonlinear mathematical models to show the relationship between these variables and increasing PT [9,39,40]. The following mathematical models were adjusted to the biochar attributes and N content and loss as a function of pyrolysis temperature: Linear model (Equation ( 4)); Quadratic model (Equation ( 5)); Elovich model (Equation ( 6)); power function (Equation ( 7)); and hyperbolic model (Equation ( 8)).…”

Section: Methodsmentioning

confidence: 99%

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Empirical Correlation between Electrical Conductivity and Nitrogen Content in Biochar as Influenced by Pyrolysis Temperature

Morais,

Silva,

Gao

et al. 2024

Nitrogen

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Much progress has been made in understanding the conditions of biochar production related to biochar properties and carbon (C). Still, very little knowledge has been gained regarding the effects on nitrogen (N), one of the most critical nutrients affected by pyrolysis temperature (PT). Analysis of N in biochar is costly, and alternative methods should be developed to estimate the N content in biochar quickly under different pyrolysis conditions. We hypothesized that there was a correlation between biochar N content and its electrical conductivity (EC). We aimed to evaluate total N and the effect of PT through the correlation with EC, a parameter that can be easily measured. Biochar products derived from coffee husk (CH) and chicken manure (CM) produced at increasing PT (300 to 750 °C) were used for the study and measured for total N and EC. The increase in PT caused significant N loss, consequently reducing total N content in biochars, with the highest loss (82%) and lowest total N content (1.2 g kg−1) found in CM biochar pyrolyzed at 750 °C. The lowest N loss (21% for CH biochar and 36% for CM biochar) was observed at a PT of 300 °C. A negative correlation between EC and total N and a positive correlation with N loss were found in both biochar products across the wide range of PT investigated. To preserve the N content in biochars, the PT should not exceed 400 °C. Our results indicate that EC is a fast and accurate biochar proxy attribute capable of predicting the N content and its loss in coffee husk and chicken manure-derived biochars as the pyrolysis temperature increased from 300 °C to 750 °C and could be used as an alternative to predict the N in biochar easily. A more extensive set of biochar samples and pyrolysis conditions should be tested to validate this approach.

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Section: Discussionmentioning

confidence: 58%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Empirical Correlation between Electrical Conductivity and Nitrogen Content in Biochar as Influenced by Pyrolysis Temperature

Morais,

Silva,

Gao

et al. 2024

Nitrogen

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show abstract

“…Hemicellulose undergoes degradation in the temperature range of 170-210°C, while other easily degradable substancendergo decarboxylation. The region of 210-300°C corresponds to the lowtemperature degradation of biodegradable materials and includes the thermal degradation of carbonaceous biomass, the degradation of aliphatic compounds (Raclavska et al 2021), and the slow degradation of some easily degradable aromatic structures. The 300 and 400-450°C corresponds to the organic polymers present in the sample or produced during the curing phase (Diaz et al 2021).…”

Section: )mentioning

confidence: 99%

Optimization of composting methods for efficient use of cassava waste, using microbial degradation

Cong

Gao

et al. 2023

Environ Sci Pollut Res

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With the recent revolution in the green economy, agricultural solid waste resource utilization has become an important project. A small-scale laboratory orthogonal experiment was set up to investigate the effects of C/N ratio, initial moisture content and ll ratio (v cassava residue : v gravel ) on the maturity of cassava residue compost by adding Bacillus subtilis and Azotobacter chroococcum. The highest temperature in the thermophilic phase of the low C/N ratio treatment is signi cantly lower than the medium and high C/N ratios. The C/N ratio and moisture content have a signi cant impact on the results of cassava residue composting, while the lling ratio only has a signi cant impact on the pH value and phosphorus content. Based on comprehensive analysis, the recommended process parameters for pure cassava residue composting are a C/N ratio of 25, an initial moisture content of 60%, and a lling ratio of 5. Under these conditions, the high-temperature conditions can be reached and maintained quickly, the organic matter has been degraded by 36.1%, the pH value has dropped to 7.36, the E4/E6 ratio is 1.61, the conductivity value has dropped to 2.52 mS/cm, and the nal germination index increased to 88%. The thermogravimetry, scanning electron microscope, and energy spectrum analysis also showed that the cassava residue was effectively biodegraded. Cassava residue composting with this process parameter has great reference signi cance for the actual production and application of agriculture.

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Insight to maturity during biogas residue from food waste composting in terms of multivariable interaction

Chen¹,

Zhang²,

Li³

et al. 2022

Environ Sci Pollut Res

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Effect of biochar addition on the improvement of the quality parameters of compost used for land reclamation

Cited by 8 publications

References 85 publications

Empirical Correlation between Electrical Conductivity and Nitrogen Content in Biochar as Influenced by Pyrolysis Temperature

Empirical Correlation between Electrical Conductivity and Nitrogen Content in Biochar as Influenced by Pyrolysis Temperature

Optimization of composting methods for efficient use of cassava waste, using microbial degradation

Insight to maturity during biogas residue from food waste composting in terms of multivariable interaction

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