Valorization of full-scale waste aerobic granular sludge for biogas production and the characteristics of the digestate

Cydzik‐Kwiatkowska, Agnieszka; Bernat, Katarzyna; Zielińska, Magdalena; Gusiatin, Mariusz Z; Wojnowska‐Baryła, Irena; Kulikowska, Dorota

doi:10.1016/j.chemosphere.2022.135167

Cited by 18 publications

(28 citation statements)

References 48 publications

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“…Furthermore, it was found that both co-digestion and increased OLR offered the opportunity to capture the highest CH 4 content at the optimal biogas yield rate. Cydzik-Kwiatkowska et al [60] recorded 66 % methane potential improvement when applying an ultrasound pretreatment on AGS. Palmeiro-Sa ´nchez et al [45] examined the digestibility of granules used to treat brackish wastewater.…”

Section: Anaerobic Stabilization Of Excess Granular Sludgementioning

confidence: 99%

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Aerobic Granular Sludge: Perspectives for Excess Sludge Management and Resource Recovery

Dababat,

Enaime,

Wichern

et al. 2023

Chemie Ingenieur Technik

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Aerobic granular sludge (AGS) technology is gaining increasing interest globally. However, several aspects are still challenging its installation, as the integration into existing municipal wastewater treatment plants. The operation of AGS units in continuous flow mode could facilitate that integration; yet has only been experienced at lab and pilot scales. Further, handling of excess granular sludge constitutes a prominent challenge. Even that, adopting effective strategies for its management holds promising contributions to the circular economy by fostering the reuse and recovery of valuable resources. The recovery of phosphorus and alginate‐like polymers holds significant commercial potential worldwide, with broad applications in agriculture, food, pharmaceuticals, and biotechnology.

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Section: Anaerobic Stabilization Of Excess Granular Sludgementioning

confidence: 99%

“…While subjecting the AGS to a pretreatment stage can shorten the digestion HRT. The co‐digestion reduced the HRT by 30 % 41, and ultrasound pretreatment was able to offer a 25 % reduction in the HRT 60. According to the literature, it can be concluded that the digestibility of AGS is impacted by several factors.…”

Section: Excess Granular Sludge Managementmentioning

confidence: 99%

Aerobic Granular Sludge: Perspectives for Excess Sludge Management and Resource Recovery

Dababat,

Enaime,

Wichern

et al. 2023

Chemie Ingenieur Technik

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“…The productivity growth rate steadily increased with the increase in implementation scale. This phenomenon was attributed to the low production efficiency caused by the low calorific value and C/N ratio of the sewage sludge [11,45,46].…”

Section: Revenue Of By-productsmentioning

confidence: 99%

“…Sewage sludge recycling via energy recovery or resource reuse can improve the neutrality of environmental impacts such as carbon emissions. We introduced a carbon trading mechanism for sludge treatment and recycling systems (STRSs) to contribute to the carbon neutrality of wastewater treatment systems in China [11].…”

Section: Introductionmentioning

confidence: 99%

Environmental and Economic Implication of Implementation Scale of Sewage Sludge Recycling Systems Considering Carbon Trading Price

et al. 2022

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With China’s ongoing economic development and increasing emphasis on environmental protection, the number and treatment capacity of sewage plants is increasing annually. Simultaneously, sludge production is increasing. In recent years, researchers have investigated various approaches to the environmental and economic analysis of sludge treatment and recycling systems (STRS). These investigations did not take the universal law of different capacities for environmental impact and STRS economics into account. The aim of this study was to analyze the scale effect of STRS with different technologies (i.e., incineration, aerobic composting, used in material (brick), anaerobic digestion) on the environment and economy. Moreover, the cost–benefit impact of introducing a carbon- trading mechanism into the STRS to achieve carbon neutrality was analyzed. After reducing carbon emissions through by-products of STRS, the carbon emission quota can be sold, which will generate income. The results show that the break-even scales for incineration, anaerobic composting, used in building material (brick), and anaerobic digestion are 54,899, 6707, 48,775, and 4425 t/y, respectively. The break-even scale of each system decreased after the introduction of the carbon trading system into the STRS. These findings could provide critical technical information for superior decision-making in sewage sludge recycling systems.

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“…For example, aeration efficiency has been extensively studied for CAS systems (Baquero‐Rodríguez et al, 2018) but scarcely for AGS processes (Strubbe et al, 2023). Similarly, the biogas production process from activated sludge has been broadly studied regarding methods and improvements (Uthirakrishnan et al, 2022), but the studies of waste AGS biogas potential are few (Bernat et al, 2017; Cydzik‐Kwiatkowska et al, 2022; Guo et al, 2020; Jahn et al, 2019). Biogas can be produced in anaerobic digestion from the excess sludge, which can positively impact the energy balance (Gude, 2015) and thereby contribute to the sustainability of the WWTP.…”

Section: Introductionmentioning

confidence: 99%

Case study of aerobic granular sludge and activated sludge—Energy usage, footprint, and nutrient removal

Ekholm

Blois²,

Persson

et al. 2023

Water Environment Research

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This study demonstrates a comparison of energy usage, land footprint and volumetric requirements of municipal wastewater treatment with aerobic granular sludge (AGS) and conventional activated sludge (CAS) at a full‐scale wastewater treatment plant characterized by large fluctuations in nutrient loadings and temperature. The concentration of organic matter in the influent to the AGS was increased by means of hydrolysis and bypassing the pre‐settler. Both treatment lines produced effluent concentrations below 5 mg BOD7 L‐1, 10 mg TN L‐1, and 1 mg TP L‐1, by enhanced biological nitrogen‐ and phosphorus removal. In this case study, the averages of volumetric energy usage over one year were 0.22 ± 0.08 and 0.26 ± 0.07 kWh m‐3 for the AGS and CAS, respectively. A larger difference was observed for the energy usage per reduced P.E., which was on average 0.19 ± 0.08 kWh P.E.‐1 for the AGS and 0.30 ± 0.08 kWh P.E.‐1 for the CAS. However, both processes had the potential for decreased energy usage. Over one year, both processes showed similar fluctuations in energy usage, related to variations in loading, temperature, and DO. The AGS had a lower specific area, 0.3 m2 m‐3 d‐1, compared to 0.6 m2 m‐3 d‐1 of the CAS, and also a lower specific volume, 1.3 m3 m‐3 d‐1 compared to 2.0 m3 m‐3 d‐1. This study confirms that AGS at full‐scale can be compact and still have comparable energy usage as CAS.

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Valorization of full-scale waste aerobic granular sludge for biogas production and the characteristics of the digestate

Cited by 18 publications

References 48 publications

Aerobic Granular Sludge: Perspectives for Excess Sludge Management and Resource Recovery

Aerobic Granular Sludge: Perspectives for Excess Sludge Management and Resource Recovery

Environmental and Economic Implication of Implementation Scale of Sewage Sludge Recycling Systems Considering Carbon Trading Price

Case study of aerobic granular sludge and activated sludge—Energy usage, footprint, and nutrient removal

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