Effect of low microwave temperature on the physical and chemical properties of waste activated sludge
Ali Alhraishawi 1 2 * , Sukru Aslan 3
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1 Graduate School of Natural and Applied Sciences, Sivas Cumhuriyet University, Sivas, TÜRKİYE2 Department of Civil Engineering, College of Engineering, Misan University, Amara, IRAQ3 Department of Environmental Engineering, Sivas Cumhuriyet University, Sivas, TÜRKİYE* Corresponding Author

Abstract

In this study, the effect of microwave (MW) irradiation at a target temperature of 80 °C with a heating rate of two °C/min and a holding time of five minutes on the physicochemical properties of activated sludge was studied. The results showed that subjecting biosludge to MW pretreatment resulted in a reduction in particle size to 14.5, 44.6, and 72.8 for d10, d50, and d90, respectively and an increase in the specific surface area of the biosludge to 235.9 m2/kg. Pretreatment resulted in an increase in soluble oxygen demand, sugar, and protein concentrations to 2,380.0 mg/L, 66.5 mg/L, and 1.81 g/L, respectively. A slight increase in the release of inorganic compounds, especially NH4-N and PO4-P, was observed in the disintegrated biosludge. While there was an increase in release of K and Zn, a decrease in concentrations of Na, Ca, Mg, and Al in the liquid was observed after MW irradiation. It was determined that the dewatering property deteriorated after biosludge disintegration, as it increased from raw sludge to disintegrated sludge by 21-fold.

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Article Type: Research Article

EUR J SUSTAIN DEV RES, 2024, Volume 8, Issue 2, Article No: em0255

https://doi.org/10.29333/ejosdr/14461

Publication date: 11 Apr 2024

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Article Downloads: 148

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