A new mechanical cutting pretreatment approach towards the improvement of primary sludge fermentation and anaerobic digestion

Wang, Xiaochang C.; Xie, Yili; Qi, Xuefei; Chen, Tiantian; Zhang, Yudi; Gao, Chuyue; Zhang, Anlong; Ren, Wuang

doi:10.1016/j.jece.2022.107163

Cited by 17 publications

(7 citation statements)

References 50 publications

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“…Firmicutes are thought to play an important role in the production of extracellular enzymes and the improvement of cellulose and protein hydrolysis [55]. Firmicutes have the potential to transfer electrons during anaerobic digestion, especially under alkaline conditions, showing a higher RA [56,57].…”

Section: Bacterial Communitiesmentioning

confidence: 99%

Comparison of Anaerobic Co-Digestion of Buffalo Manure and Excess Sludge with Different Mixing Ratios under Thermophilic and Mesophilic Conditions

Zhou

Sheng

et al. 2023

Sustainability

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In this study, the main aim is to evaluate the mixing ratio of co-digestion of buffalo manure (BM) and excess sludge (ES) influenced for methane yield and digestate dewaterability. Five batch experiments with different BM and ES mixing ratios were carried out under thermophilic and mesophilic conditions. The methane yield of co-digestion of BM and ES increased by 10.1–73.5% under thermophilic conditions and 87.9–153.3% under mesophilic conditions, compared with the mono-anaerobic digestion of ES under the same conditions. Shannon and Chao1 indices showed that the bacterial species of the mesophilic digesters were more abundant than that of the thermophilic digesters. With the increase in the BM proportion in the substrate, the normalized capillary suction time (NCST) and total solids (TS) of sediment (centrifugal dewatering) increased. The NCST at thermophilic temperature (8.98–12.54 s∙g−1-TS) was greater than that at the mesophilic temperatures (5.45–12.32 s∙g−1-TS). However, the TS of sediment was not directly related to the digestion temperature. This study has shown that anaerobic co-digestion of BM and ES at the appropriate ratio (BM/ES = 1:1.5) has a significant meaning in a high methane yield.

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Section: Bacterial Communitiesmentioning

confidence: 99%

Comparison of Anaerobic Co-Digestion of Buffalo Manure and Excess Sludge with Different Mixing Ratios under Thermophilic and Mesophilic Conditions

Zhou

Sheng

et al. 2023

Sustainability

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“…Recently, the hydrolysis and acidification of PS was promoted significantly by the mechanical cutting pretreatment (MCP) method [98]. The maximum cumulative biogas production in the pretreatment group was about six times that in the control group.…”

Section: Treatment Processes and Enhancement Of Primary Sludge Anaero...mentioning

confidence: 99%

Enhancing Methane Yield in Anaerobic Co-Digestion of Primary Sewage Sludge: A Comprehensive Review on Potential Additives and Strategies

Sakaveli,

Petala,

Tsiridis

et al. 2024

Waste

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Traditionally, anaerobic digestion has been applied to mixed sludge, combining primary sludge (PS) with secondary sludge. However, recent research has unveiled the advantages of dedicated PS digestion due to its higher energy content. Anaerobic digestion (AD) of primary sewage sludge can offer a sustainable solution for managing sewage sludge while generating renewable energy. The present study provides a comprehensive examination of the current state of knowledge regarding the anaerobic digestion of PS. Co-digestion of PS with organic substrates, including food waste and agro-industrial residues, emerges as a promising approach to boost biogas production. Additionally, the utilization of additives such as glucose and clay minerals has shown potential in improving methane yield. Critical factors affecting AD, such as pretreatment methods, carbon-to-nitrogen (C/N) ratio, temperature, pH, volatile fatty acids (VFAs) levels, organic loading rates (OLR), inoculum-to-substrate ratio (ISR), and the role of additives, have been meticulously studied. Finally, this review consolidates existing knowledge to advance our understanding of primary sewage sludge anaerobic digestion, fostering more efficient and sustainable practices in sludge management and renewable energy generation.

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“…Pretreatments make sludge more susceptible to digestion. Without some kind of pretreatment, the digestion process takes longer and the amount of residual sludge to be disposed of in the end is lower [57]. In addition, it has been found that a higher energy requirement is needed to achieve water removal from sludges with lower water content.…”

Section: Sludge Treatmentmentioning

confidence: 99%

Waste in the Treatment of Textile Wastewater by Pressure-Driven Membrane Processes

Ćurić,

Brezinščak,

Dolar

2023

Solid Waste Management - Recent Advances, New Trends and Applications

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Due to strong globalization and industrialization, water has become a scarce resource. One industry that uses a lot of water and generates a large amount of wastewater is the textile industry. According to the Best Available Techniques reference document, pressure-driven membrane processes have been declared the best methods for the treatment and reuse of textile wastewater. Such processes generate a certain amount of solid waste in addition to excellent permeate quality. This book chapter provides a critical overview of pressure-driven membrane processes (microfiltration, ultrafiltration, nanofiltration, reverse osmosis) and membrane bioreactor (MBR) for the treatment of textile wastewater. Finally, this chapter covers the treatment and disposal of retentate and MBR sludge.

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A new mechanical cutting pretreatment approach towards the improvement of primary sludge fermentation and anaerobic digestion

Cited by 17 publications

References 50 publications

Comparison of Anaerobic Co-Digestion of Buffalo Manure and Excess Sludge with Different Mixing Ratios under Thermophilic and Mesophilic Conditions

Comparison of Anaerobic Co-Digestion of Buffalo Manure and Excess Sludge with Different Mixing Ratios under Thermophilic and Mesophilic Conditions

Enhancing Methane Yield in Anaerobic Co-Digestion of Primary Sewage Sludge: A Comprehensive Review on Potential Additives and Strategies

Waste in the Treatment of Textile Wastewater by Pressure-Driven Membrane Processes

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