Co-composting of sewage sludge as an effective technology for the production of substrates with reduced content of pharmaceutical residues

Vráblová, Martina; Smutná, Kateřina; Chamrádová, Kateřina; Vrábl, Daniel; Koutník, Ivan; Rusín, Jiří; Bouchalová, Markéta; Gavlová, Anna; Sezimová, Hana; Navrátil, Martin; Chalupa, Richard; Tenklová, Barbora; Pavlíková, Jitka

doi:10.1016/j.scitotenv.2023.169818

Cited by 2 publications

(1 citation statement)

References 75 publications

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“…In order to optimise moisture content and aeration, it is advisable to use bulking agents to simultaneously improve the quality of the final product [Vráblová et al, 2024]. Some added substrates are considered as bulking agents because they only act on the physical structure of the compost, but in most cases these substrates also have a direct or indirect impact on other composting parameters and can be considered as additives [Villasenor et al, 2011].…”

Section: Introductionmentioning

confidence: 99%

Properties of Organic Matter in Composts Based on Sewage Sludge

Myszura-Dymek

2024

J. Ecol. Eng.

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The aim of the research was to assess the quality of organic matter contained in sewage sludge composting products and their co-composting with fly ash and mineral wool. The object of the research were composts produced using stabilized sewage sludge from the municipal sewage treatment plant (SS_1C) and sewage sludge with the addition of 20% (SSF_2C) and 30% (SSF_3C) of fly ash and 5% (SSW_4C) and 10% (SSW_5C) of mineral wool. Selected physicochemical properties, fractional composition of humic compounds, and the degree and rate of humification were determined in compost samples taken after 180 days of composting. The reaction of the evaluated composts was close to optimal for mature composts. Co-composting of sewage sludge with mineral wool and ash increased the sorption capacity in composts compared to SS_1C. Due to the content of available P and Mg, the discussed composts formed the SS_1C>SSF_2C and SSF_3C>SSW_4C and SSW_5C series. However, in terms of available K content: SSF_2C and SSF_3C>SSW_4C and SSW_5C>SS_1C. In the SS_1C compost the organic carbon (TOC) content was slightly higher, but no statistically significant effect of the addition of fly ash and mineral wool on the TOC content in mature composts was confirmed. The addition of ash and mineral wool significantly increased the total nitrogen content. Due to the humification index, the composts formed the series: SSW_4C > SSW_5C > SSF_2C > SS_1C > SSF_3C. The values of the C-KH/C-KF ratio in SS_1C were typical for good quality soils, while in the remaining composts the C-KH/C-KF values were slightly lower. The degree of humification of the assessed composts was characterized by poorly humified organic materials, with the highest values of this indicator found in composts with the addition of mineral wool. The assessed quality indicators of organic matter indicate that the organic matter of composts from sewage sludge with the addition of mineral wool and 100% sludge was of the highest quality.

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Section: Introductionmentioning

confidence: 99%

Properties of Organic Matter in Composts Based on Sewage Sludge

Myszura-Dymek

2024

J. Ecol. Eng.

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Wastewater Treatment Sludge and Agricultural Wastes: Management by Composting Process

Ucaroglu,

Atalay

2024

Water Air Soil Pollut

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This study aimed to investigate the compostability of wastewater treatment sludge and evaluate the effects on compost quality of adding cotton gin waste and peanut shell. For this purpose, treatment sludge was mixed with cotton gin waste in the ratios of 60:40 in M1 reactor and 80:20 in M2 reactor, while in M3 and M4 reactors, treatment sludge was mixed with peanut shell in the same proportions. The highest temperatures were reached in reactors M2 (65.2 °C) and M4 (68.7 °C) where 80% treatment sludge was added. These reactors also experienced the highest organic matter losses of 42.2% and 31.5%, respectively. It can be stated that a faster microbial decomposition and stabilization occurred in these reactors. It can be said that the composting process may be a preferable method for the management of treatment sludge and agricultural wastes. Furthermore, the outcomes of the study can serve the food industry and agriculture sector through effective bioconversion of organic waste. Graphical Abstract

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Co-composting of sewage sludge as an effective technology for the production of substrates with reduced content of pharmaceutical residues

Cited by 2 publications

References 75 publications

Properties of Organic Matter in Composts Based on Sewage Sludge

Properties of Organic Matter in Composts Based on Sewage Sludge

Wastewater Treatment Sludge and Agricultural Wastes: Management by Composting Process

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