Semi full-scale thermophilic anaerobic digestion (TAnD) for advanced treatment of sewage sludge: Stabilization process and pathogen reduction

Lloret, Eva; Cháfer, Amparo; Pradas, Pilar; Pascual, José Antonio

doi:10.1016/j.cej.2013.07.062

Cited by 36 publications

(19 citation statements)

References 34 publications

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“…Furthermore, some spore-forming pathogens e.g. Clostridium and Bacillus species with high resistance to acute stresses can survive after mesophilic or even thermophilic anaerobic digestion, therefore creating a hygienic problem when biosolid is spread (Dixit et al, 2005;Guzmán et al, 2007;Lloret et al, 2013). For example, biosolids produced from thermophilic AD could not meet the requirements by Directive of the European Parliament and of the Council for spreading of sludge on land due to the presence of C. perfringens spores (e.g.…”

Section: Bacterial Pathogens Parasites and Virusmentioning

confidence: 99%

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Is anaerobic digestion a reliable barrier for deactivation of pathogens in biosludge?

Zhao

Liu

2019

Science of The Total Environment

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Editor: Huu Hao NgoAs World Health Organization advocates, the global burden of sanitation related disease and access to safely managed sanitation and safely treated wastewater should be monitored strictly. However, the spread of pathogens through various agricultural applications or direct discharge of sewage sludge generated in municipal wastewater treatment plants poses a serious challenge on the environment and public health. Anaerobic digestion (AD), the principal method of stabilizing biosolids, can efficiently and largely deactivate viable pathogens, including parasite, virus, and the pathogens harboring antibiotic resistance genes. This review aims to provide a critical overview regarding the deactivation of sludge-associated pathogens by AD, through which a serious concern on the effectiveness and rationality of AD towards sludge pathogens control was raised. Meanwhile, the underlying deactivation mechanisms and affecting factors were all discussed, with the focus on pathogen-associated modeling, engineering design and technological aspects of AD. Lastly, a matric method incorporating the operating strategy of AD with the risk assessment was proposed for evaluating the reliability of AD-based pathogen deactivation, while the research agenda forward was also outlined.

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Section: Bacterial Pathogens Parasites and Virusmentioning

confidence: 99%

“…For example, biosolids produced from thermophilic AD could not meet the requirements by Directive of the European Parliament and of the Council for spreading of sludge on land due to the presence of C. perfringens spores (e.g. 9.6 × 104 CFUs mL −1 ) (Lloret et al, 2013).…”

Section: Bacterial Pathogens Parasites and Virusmentioning

confidence: 99%

Is anaerobic digestion a reliable barrier for deactivation of pathogens in biosludge?

Zhao

Liu

2019

Science of The Total Environment

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“…Besides aiding methanogenesis through increased hydrolysis rate, TAD also decreases the level of pathogens. This reduces the potential health hazards for the biogas plant operators as well as ensures safe disposal of the digestate after process completion [36].…”

Section: Introductionmentioning

confidence: 99%

Thermophilic Anaerobic Digestion: Enhanced and Sustainable Methane Production from Co-Digestion of Food and Lignocellulosic Wastes

et al. 2018

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Abstract:This article aims to study the codigestion of food waste (FW) and three different lignocellulosic wastes (LW) (Corn stover (CS), Prairie cordgrass (PCG), and Unbleached paper (UBP)) for thermophilic anaerobic digestion to overcome the limitations of digesting food waste alone (volatile fatty acids accumulation and low C:N ratio). Using an enriched thermophilic methanogenic consortium, all the food and lignocellulosic waste mixtures showed positive synergistic effects of codigestion. After 30 days of incubation at 60 • C (100 rpm), the highest methane yield of 305.45 L·kg −1 volatile solids (VS) was achieved with a combination of FW-PCG-CS followed by 279.31 L·kg −1 VS with a mixture of FW-PCG. The corresponding volatile solids reduction for these two co-digestion mixtures was 68% and 58%, respectively. This study demonstrated a reduced hydraulic retention time for methane production using FW and LW.

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“…Therefore, optimization of management and disposal alternatives for sewage sludge has gained much attention worldwide [2]. This is especially true for waste activated sludge (WAS) derived from the secondary sedimentation basin which needs to be stabilized prior to final disposal in order to reduce its organic content to mitigate odor and pathogen issues [3].…”

Section: Introductionmentioning

confidence: 99%

A simple kinetic modeling approach for aerobic stabilization of real waste activated sludge

Bahar

Çığgın

2016

Chemical Engineering Journal

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Semi full-scale thermophilic anaerobic digestion (TAnD) for advanced treatment of sewage sludge: Stabilization process and pathogen reduction

Cited by 36 publications

References 34 publications

Is anaerobic digestion a reliable barrier for deactivation of pathogens in biosludge?

Is anaerobic digestion a reliable barrier for deactivation of pathogens in biosludge?

Thermophilic Anaerobic Digestion: Enhanced and Sustainable Methane Production from Co-Digestion of Food and Lignocellulosic Wastes

A simple kinetic modeling approach for aerobic stabilization of real waste activated sludge

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