Anaerobic co-digestion of sewage sludge with other organic wastes: A comprehensive review focusing on selection criteria, operational conditions, and microbiology

Azarmanesh, R.; Qaretapeh, M. Zarghami; Zonoozi, M. Hasani; Ghiasinejad, Hossein; Zhang, Y.

doi:10.1016/j.ceja.2023.100453

Cited by 25 publications

(5 citation statements)

References 182 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, during the experiment, a decline was observed of hydrogenothophic methanogens of the Halobacterota and Euryarchaeota phylums, e.g., the Methanocorpusculum and Methanobrevibacter genera, until their almost complete disappearance on the last day of the third HRT (Figure 7). The development of an acetoclastic methanogen classified as Methanosarcina genus was promoted for all digesters from in the inoculum at zero time to the last day of the second HRT, which would explain the drastic decrease in VFAs at the beginning of the experiment, as well as the stability in methane production (Figures 1-3) [34]. Furthermore, the drastic decrease in methanogens was reflected in a decrease in methane production at the end of the experiment (Figure 7).…”

Section: Discussionmentioning

confidence: 91%

Microbial Population Dynamics during Unstable Operation of a Semicontinuous Anaerobic Digester Fed with a Mild-Treated Olive Mill Solid Waste

Cubero-Cardoso,

Fernández-Prior,

Ramiro-Garcia

et al. 2023

Processes

View full text Add to dashboard Cite

This research evaluates process instability together with microbial population dynamics of the startup of an anaerobic digestion of a mild pretreated solid olive oil waste. The pretreatment consisted of a mild thermal treatment called thermo-malaxation and a subsequent dephenolized process of the olive mill solid waste. The anaerobic digestion process of the mild pretreated and partially dephenolized biomass was studied for three Hydraulic Retention Times (HRTs), with 21 days each HRT, with an organic load rate of 1 g VS/L d, carried out at mesophilic temperature (35 ± 1 °C). The average value of methane yield decreased from 204 ± 9 mL CH4/g VS d on day 21, the last day of the first HRT, to 87 ± 24 mL CH4/g VS d on day 60, the last day of the third HRT. The alkalinity decreased drastically, indicating instability of the anaerobic digestion process. Although phenolic compounds were partially extracted in the pretreatment, the observed increase in phenolic compounds during reactor operation might be contributed to the methane production decay. Interestingly, volatile fatty acids decreased with time, indicating that not only the methanogenic stage but also the hydrolysis stage was affected. Indeed, the microbial analysis showed that the abundance of hydrolytic bacteria decreased over time. It is also worth noticing that hydrogenotrophic methanogens, while present during the first two HRTs, were not observed at the end of the last HRT. This observation, together with the increase in the relative abundance of acetoclastic methanogens, showed a shift in the methane production pathway from hydrogenotrophic methanogenesis to acetotrophic methanogenesis.

show abstract

Section: Discussionmentioning

confidence: 91%

Microbial Population Dynamics during Unstable Operation of a Semicontinuous Anaerobic Digester Fed with a Mild-Treated Olive Mill Solid Waste

Cubero-Cardoso,

Fernández-Prior,

Ramiro-Garcia

et al. 2023

Processes

View full text Add to dashboard Cite

show abstract

“…Protein-rich substrates, mainly derived from animal manure, milk and meat processing industries, and slaughterhouse waste, possess high biological oxygen demand, high nitrogen concentration, and yield a greater methane potential [ 91 , 92 ]. However, the microbial degradation of this substrate type often leads to ammonia buildup, which can impede methanogenic activity at values up to 4 g/l, destabilize the fermentation, and even lead to process failure [ [93] , [94] , [95] ]. AcoD with carbohydrate-rich substrates (e.g., lignocellulosic residues, food wastes, and vegetable wastes) is one of the most efficient tactics to prevent such problems.…”

Section: Valorization Of Agricultural Wastesmentioning

confidence: 99%

Valorization of crop residues and animal wastes: Anaerobic co-digestion technology

Adnane,

Taoumi,

Elouahabi

et al. 2024

Heliyon

View full text Add to dashboard Cite

“…The topic of optimizing the methanogenesis of waste from the agri-food industry is increasingly being discussed in the scientific literature. In most cases, this is related to creating compositions of various materials for the co-digestion of slaughterhouse waste, as the process is problematic for logistical, economic, and environmental reasons [13][14][15][16]. This is because waste is usually created in places where there is no access to structure-forming materials or materials with a broad C:N ratio.…”

Section: Introductionmentioning

confidence: 99%

The Impact of Biochar Additives and Fat-Emulsifying Substances on the Efficiency of the Slaughterhouse Waste Biogasing Process

Kuboń,

Komorowska,

Niemiec

et al. 2024

Energies

View full text Add to dashboard Cite

Waste management in the agri-food industry is an important technological and environmental problem. Slaughterhouse waste is particularly problematic, as it contains significant amounts of proteins and lipids, neither of which constitute a good substrate for methane production. The physical properties of mixtures of fat and polar solvents inhibit the methanogenesis process. The aim of this research was to assess the impact of the addition of fat emulsifiers and biochar on the amount of biogas produced and the level of carbon conversion per unit of waste weight. The assumed goal was achieved based on a laboratory experiment using static methane fermentation, carried out in accordance with the methodology of the DIN 38414/S8 standard. The results of the experiment indicate that the addition of fat emulsifiers increased the biogas yield from slaughterhouse waste from approximately 370 to 430 dm3 per 2 kg dry weight of waste. Each technological variant resulted in an increase in the amount of carbon that was transformed in the methanogenesis process. Although the level of carbon transformation in the methanogenesis process increased by approximately 20% in objects with emulsifier addition, the use of biochar and fat emulsifiers did not change the amount of methane production. Within the assumed system limits, therefore, the use of fat emulsifiers and biochar seems to be pointless. However, the use of the developed technology can improve the efficiency of biogas production by up to 18% and shorten the process by 5 days. Assuming the continuous operation of the biogas plant, the use of the developed technology will increase the efficiency of biogas production from slaughterhouse waste in the long term by over 30% without the need to modify the infrastructure in the biogas plant.

show abstract

Anaerobic co-digestion of sewage sludge with other organic wastes: A comprehensive review focusing on selection criteria, operational conditions, and microbiology

Cited by 25 publications

References 182 publications

Microbial Population Dynamics during Unstable Operation of a Semicontinuous Anaerobic Digester Fed with a Mild-Treated Olive Mill Solid Waste

Microbial Population Dynamics during Unstable Operation of a Semicontinuous Anaerobic Digester Fed with a Mild-Treated Olive Mill Solid Waste

Valorization of crop residues and animal wastes: Anaerobic co-digestion technology

The Impact of Biochar Additives and Fat-Emulsifying Substances on the Efficiency of the Slaughterhouse Waste Biogasing Process

Contact Info

Product

Resources

About