Enhanced energy and nutrient recovery via hydrothermal carbonisation of sewage sludge: Effect of process parameters

Rathika, K.; Kumar, Sunil; Yadav, Bholu Ram

doi:10.1016/j.scitotenv.2023.167828

Cited by 8 publications

(2 citation statements)

References 84 publications

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“…The water content should be significantly decreased so that the sludge can be used for energy recovery. Sewage sludge can be considered a fuel because of its high heating value (10-14 MJ) and volatile content [5,54,73].…”

Section: Thermal Treatment Of Sewage Sludgementioning

confidence: 99%

Conversion of Sewage Sludge into Biofuels via Different Pathways and Their Use in Agriculture: A Comprehensive Review

Kowalski,

Makara,

Kulczycka

et al. 2024

Energies

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The valorisation of sewage sludge for sustainable agricultural use and biofuel production proposes an effective and beneficial management of sewage sludge in a closed-loop cycle. The management of sewage sludge biowaste is a rising problem due to increasing waste storage expenses. In this sense, the use of circular economy principles in sewage sludge management creates opportunities to develop new technologies for processing. The biorefinery model allows the application of wasteless technologies via sewage sludge valorisation in terms of agricultural use and biofuel production, especially with the hydrothermal carbonisation method. Applying hydrothermal carbonisation in the treatment of biosolid sewage sludge has numerous benefits due to processing highly hydrated organic waste into carbon hydro char, a high-quality solid biofuel. The direct use of sewage sludge in the soil does not allow for full use of its functional properties. However, the hydrothermal carbonisation of sewage sludge results in biocarbon pellets, making it a viable approach. This work also discusses the barriers (legal, chemical, biological, and technical) and possibilities related to sewage sludge biorefining processes.

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Section: Thermal Treatment Of Sewage Sludgementioning

confidence: 99%

Conversion of Sewage Sludge into Biofuels via Different Pathways and Their Use in Agriculture: A Comprehensive Review

Kowalski,

Makara,

Kulczycka

et al. 2024

Energies

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“…Sewage sludge (SS) is a ubiquitous side-product of municipal and industrial wastewater treatment plants. Sludge treatment in municipal wastewater plants is a complex operation with possible environmental implications whose cost can exceed half of the total operational cost of the unit [1,2]. SS consists of organic chemicals, inorganic compounds, nutrients, pathogens, and large amounts of water [3,4].…”

Section: Introductionmentioning

confidence: 99%

Optimizing the Extraction of Sugars from Sewage Sludge Using Ultrasound Combined with Thermal–Alkali

Fan,

Li,

Fonseca

et al. 2024

Water

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The extraction and utilization of sugars from readily available and cost-effective sewage sludge increases the economic potential of this residue, contributing to sustainable urban development. The work presented here presents a novel method in which sugars can be directly extracted from sewage sludge following an ultrasound + thermal–alkali pretreatment. The best results indicated that by subjecting the sludge to a 240 W ultrasound for 20 min, followed by alkali digestion using 6 mL of a 2 M NaOH solution at 48 °C for 60 min, it was possible to maximize the yield of crude sugar (34.22 wt.% dry) with the purity of crude sugar at 46.80%, reaching an extraction efficiency of 99.84%. Response surface methodology was used to optimize the crude sugar yields based on experimental data, reaching a value of 34.67 wt.% dry when employing an ultrasound exposure time of 12.5 min and 6 mL of the NaOH solution for a digestion time of 57.5 min; these results were considered consistent with the experimental data.

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Turning Solid Waste into Catalysts: A Path for Environmental Solutions

Rautela,

Sharma,

Prakash Ranjan

et al. 2024

ChemPlusChem

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Waste, often overlooked, stands out as a prime source of valuable products, meeting the demand for natural resources. In the face of environmental challenges, this study explores the crucial role of waste‐derived catalysts in sustainable practices, emphasizing the transformative potential of solid waste materials. Carbon‐based catalysts sourced from agricultural, municipal, and industrial waste streams can be transformed into activated carbon, biochar, and hydrochar which are extensively used adsorbents. Furthermore, the paper also highlights the potential of transition metal‐based catalysts derived from spent batteries, electronic waste, and industrial byproducts, showcasing their efficacy in environmental remediation processes. Calcium‐based catalysts originating from food waste, including seashells, eggshells, bones, as well as industrial and construction waste also find an extensive application in biodiesel production, providing a comprehensive overview of their promising role in sustainable and eco‐friendly practices. From mitigating pollutants to recovering valuable resources, waste‐derived catalysts exhibit a versatile role in addressing waste management challenges and promoting resource sustainability. By transforming waste into valuable catalysts, this study champions a paradigm shift towards a more sustainable and resource‐efficient future.

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Enhanced energy and nutrient recovery via hydrothermal carbonisation of sewage sludge: Effect of process parameters

Cited by 8 publications

References 84 publications

Conversion of Sewage Sludge into Biofuels via Different Pathways and Their Use in Agriculture: A Comprehensive Review

Conversion of Sewage Sludge into Biofuels via Different Pathways and Their Use in Agriculture: A Comprehensive Review

Optimizing the Extraction of Sugars from Sewage Sludge Using Ultrasound Combined with Thermal–Alkali

Turning Solid Waste into Catalysts: A Path for Environmental Solutions

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