Carbon Mineralization in a Soil Amended with Sewage Sludge-Derived Biochar

Figueiredo, Cícero Célio de; Coser, Thais Rodrigues; Moreira, Túlio Nascimento; Leão, Tairone Paiva; Vale, Ailton Teixeira do; Paz‐Ferreiro, Jorge

doi:10.3390/app9214481

Cited by 17 publications

(4 citation statements)

References 44 publications

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“…This result is in line with other studies ( Boyle and Paul, 1989 ; Stark and Clapp, 1980 ), which report that the total mineralized N increases with the dose of organic N applied with the sludge. Since sludge contributes most of the N in organic forms ( Figueiredo et al., 2019 ; Yoneyama and Yoshida, 1978 ), increasing the sludge dose increases the soil mineralized N. The most significant fraction of sum N_min in this study is in the plant N and lowest in the residual mineral N in soils at harvest. The low concentrations of residual mineral N could be explained by sequential mineralization, which allows crops to meet their N needs by leaving low amounts of mineral N in the soil ( Andrade et al., 2000 ).…”

Section: Resultsmentioning

confidence: 64%

Biomass production, metal and nutrient content in sorghum plants grown on soils amended with sewage sludge

Arló

Beretta²,

Szögi

et al. 2022

Heliyon

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Sludge generation from wastewater treatment plants in Uruguay has increased in recent years. Agricultural soils may be a final destination. A greenhouse experiment was conducted to quantify the effect of this sludge on 1) plant biomass production and nutrient concentration of sorghum ( Sorghum bicolor var. vulgare); 2) the chemical properties of amended soils; and 3) assess whether heavy metal concentrations in sludge are appropriate according to environmental regulations. Two soils (S1 and S2) were amended with pure sludge (PS) and limed sludge (LS), with low dose (LD) of 16.0 and 17.3 Mg ha −1 and high dose (HD) of 32.0 and 34.6 Mg ha −1 , respectively. Sludge treatments increased plants' nutrient absorption and dry matter production. The LS treatments incremented plant biomass production, depending on soil pH and nutrient availability. The effect of sludge treatments on elemental concentration in aboveground biomass depended on the element, treatments, and soil type. Mineralized nitrogen (N) and plant available phosphorus (P-Bray 1) values increased with sludge addition without exceeding Uruguay's critical soil level of P-Bray 1 for the sorghum crop. The PS did not increase metal concentration in soils. The LS slightly decreased soil Pb and slightly increased Cr and Zn soil concentration; levels were according to Uruguayan environmental guidelines. Therefore, agriculture soils are a viable final destination for PS and LS. Land applied sludge has acceptable levels of metals and promotes crop development.

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Section: Resultsmentioning

confidence: 64%

Biomass production, metal and nutrient content in sorghum plants grown on soils amended with sewage sludge

Arló

Beretta²,

Szögi

et al. 2022

Heliyon

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“…The content of available P could be affected also with the pyrolysis temperature. It has been observed that the total P content increased with pyrolysis temperature, and highest available P contents were observed from biochar prepared at temperatures not exceeding 300 °C [66]. BC prepared for experiments presented in this study did not exceed 250 °C.…”

Section: Biochar Characteristicsmentioning

confidence: 53%

Microwave pyrolyzed sewage sludge: influence on soil microbiology, nutrient status, and plant biomass

Lónová

Holátko

Hammerschmiedt

et al. 2022

Chem. Biol. Technol. Agric.

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Background Sewage sludge (SS) has been considered a potent source of soil nutrients. However, its direct application to agricultural soils have been discouraged owing to its toxic nature. Therefore, conversion and modification of SS to decrease its toxicity has resulted in advanced methods. Co-pyrolysis of SS with other amendments is an ideal treatment resulting in an environmentally safe and nutrient rich final products with additional properties to sequester carbon. In the present study, a novel biochar was produced through the microwave pyrolysis of SS mixed with zeolite and sawdust. The pyrolysis product was thus characterized for elemental composition, polycyclic aromatic hydrocarbons, via Fourier Transform Infrared Spectroscopy (FTIR), and for its effects on soil microbial characteristics, soil health and plant biomass after soil application. Results Results revealed that, the SS modification resulted in stable product with higher nutrients which further depend on the type and ratio of feedstock used. Its application to soil significantly improved soil chemical and microbiological properties and altered lettuce biomass. Conclusions We concluded that sawdust feedstock promoted nutrient availability in the resulting biochar and induced higher activity of nutrient mineralizing enzymes, whereas zeolite slowed down the release of nutrients from soil and putatively immobilized enzymes. This joint effect of sewage sludge biochar, sawdust and zeolite benefited the plant acquisition of nutrients in comparison with the microbial nutrient uptake. We thus conclude that microwave pyrolyzed SS could be used as a soil enhancer. Graphical Abstract

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“…Through chemical analysis, Berg and Mcclaugherty [37] found that due to the activity of soil microorganisms, macromolecular organics were mineralized, and the soil gradually released nitrogen from the organic matter in the form of the ammonium ion (NH 4+ ) [38,39]. This transformation process is shown in Figure 4 [40]. Broadbent and Nakashima [41] verified the "flow" process of nitrogen after the death of barley plants using the isotope marking process.…”

Section: Effect Of Thymolmentioning

confidence: 99%

Controlling Conditions of the One-Dimensional Consolidation Test on Peat Soil

et al. 2021

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This paper studies the changes in the loss on ignition (LOI), total nitrogen content (TN), and strain in a one-dimensional consolidation test on peat soil. The effects of small-range fluctuations in the ambient temperature and changes in the sample height on the consolidation process of peat soil are proposed and verify the inhibitory effect of thymol on the decomposition of organic matter. The results show that when the ambient temperature fluctuates in a small range, the consolidation rate is significantly affected. Under a low load, the ambient temperature increases by 1–2 °C, and the consolidation rate can be increased by up to 10 times. This study presents the changes in loss on ignition (LOI) and total nitrogen content (TN) during consolidation, which proves that soaking the samples with a thymol solution can effectively control the decomposition of organic matter in peat soil. The strain of peat soil at a height of 30 mm is greater than or equal to that of other height samples, while that of mucky soil is 20 mm. Therefore, 30mm is the recommended sample height for peat soil for the one-dimensional consolidation test.

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Carbon Mineralization in a Soil Amended with Sewage Sludge-Derived Biochar

Abstract: Biochar has been presented

Cited by 17 publications

References 44 publications

Biomass production, metal and nutrient content in sorghum plants grown on soils amended with sewage sludge

Biomass production, metal and nutrient content in sorghum plants grown on soils amended with sewage sludge

Microwave pyrolyzed sewage sludge: influence on soil microbiology, nutrient status, and plant biomass

Controlling Conditions of the One-Dimensional Consolidation Test on Peat Soil

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