Short-Term Decomposition and Nutrient-Supplying Ability of Sewage Sludge Digestate, Digestate Compost, and Vermicompost on Acidic Sandy and Calcareous Loamy Soils

Uzinger, Nikolett; Szécsy, Orsolya; Szűcs-Vásárhelyi, Nóra; Padra, István; Sándor, Dániel; Lončarić, Zdenko; Draskovits, Eszter; Rékási, Márk

doi:10.3390/agronomy11112249

Cited by 5 publications

(1 citation statement)

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“…Anaerobic digestion (AD) is a biochemical process conducted in an anaerobic digester, wherein a diverse community of microorganisms converts complex organic matter (OM) into biogas and digestate under controlled conditions without the presence of oxygen [1]. AD serves as a widely employed technique for effectively diminishing the volume of various biomass sources, including the organic fraction of industrial waste, energy crops, agricultural residues, and forestry remnants, while simultaneously recovering renewable energy [2,3]. Despite being recognized as a highly favorable waste treatment technology, particularly from an environmental standpoint, AD does not achieve complete waste stabilization [4].…”

Section: Introductionmentioning

confidence: 99%

Disinfection of Digestate Effluents Using Photocatalytic Nanofiltration

Chioti¹,

Sarikaki²,

Tsioni³

et al. 2023

Fermentation

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The disinfection properties of photocatalysis on liquid digestate derived from biogas plants have been investigated for the first time. The study presents the physiological characteristics of liquid digestate retrieved from various biogas plants based in northern Greece, revealing the heterogeneity of this matrix. Preliminary photocatalysis experiments conducted on inoculated liquid digestate samples showed that disinfection was possible when a pre-treated digestate underwent a combination of centrifuge–flocculation–μfiltration after 5.5 h with 0.7 g/L suspended TiO2 under UVA illumination. To explore the feasibility of an industrial application based on this concept, a novel design photocatalytic nanofiltration reactor was implemented for disinfection experiments on pre-treated liquid digestate. The synergistic action of photocatalysis during nanofiltration alleviated the leakage phenomena, and both the retentate and permeate effluents had lower concentrations of pathogens by approximately 1–2 log10 cfu/mL. This work sets out the basis for the efficient operation and engineering application of collaborative technology, with photocatalysis as the final step for liquid digestate sanitation and reusable water recovery.

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Section: Introductionmentioning

confidence: 99%

Disinfection of Digestate Effluents Using Photocatalytic Nanofiltration

Chioti¹,

Sarikaki²,

Tsioni³

et al. 2023

Fermentation

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Soil fertility and plant nutrition in an organic olive orchard after 5 years of amendment with compost, biochar or their blend

Fornes,

Lidón,

Belda

et al. 2024

Sci Rep

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The agronomic use of compost and biochar as soil amendments may exhibit contrasting results in terms of soil fertility and plant nutrition. The effects of the biennial application of biochar, compost and a blend of compost:biochar (90:10; % dw:dw) on the agronomical performance of an organically managed and well established 25-year-old olive orchard was assessed 5 years after the initial application. The agronomical evaluation was based on the assessment of the soil physical, chemical, and biological characteristics, and the assessment of the soil fertility by both crop production and nutritional status of the orchard, and the bioassay with olive plantlets. Biochar mainly benefited the physical properties (bulk density, total porosity, aeration, water retention capacity) of soil, especially in the top 0–5 cm. Compost and its blend with biochar improved microbial activity, soil nutritional status (increasing the content of soluble organic C, N, and P) and favoured the formation of aggregates in soil. The bioassay conducted with young plantlets confirmed the enhanced soil fertility status in the three amended treatments, particularly in the case of biochar and its blend with compost. However, this effect was not significantly observed in the adult plants after 5 years of application, reflecting the slow response of adult olive trees to changes in fertilization. Based on these results, alongside the desirable long-residence time of biochar in soil and the ready availability of compost, the blend of biochar with compost assayed in this study is defined as a valid strategy for preparing high quality soil organic amendments.

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Disinfection of Digestate Effluents Using Photocatalytic Nano-Filtration

Chioti¹,

Sarikaki²,

Tsioni³

et al. 2023

Preprint

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The physiological characteristics of liquid digestate retrieved from various biogas plants based in northern Greece are presented. Preliminary photocatalysis experiments on inoculated liquid di-gestate sampled showed that disinfection is possible when pre-treated digestate with a combination of centrifuge-flocculation-μFiltration after 5.5 hours of 0.7g/L suspended TiO2 under UVA illumination for the experimental conditions is used. A novel design photocatalytic nanofiltration reactor was implemented for disinfection experiments on pre-treated liquid digestate, giving promising results. This work sets the basis for the efficient operation and engineering application of technology collaboration with photocatalysis as the final step for liquid digestate sanitation and reusable water recovery.

show abstract

Short-Term Decomposition and Nutrient-Supplying Ability of Sewage Sludge Digestate, Digestate Compost, and Vermicompost on Acidic Sandy and Calcareous Loamy Soils

Cited by 5 publications

References 50 publications

Disinfection of Digestate Effluents Using Photocatalytic Nanofiltration

Disinfection of Digestate Effluents Using Photocatalytic Nanofiltration

Soil fertility and plant nutrition in an organic olive orchard after 5 years of amendment with compost, biochar or their blend

Disinfection of Digestate Effluents Using Photocatalytic Nano-Filtration

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