Anaerobic co-digestion of municipal sewage sludge and fruit/vegetable waste: effect of different mixtures on digester stability and methane yield

Arhoun, Brahim; Villén-Guzmán, María; Vereda‐Alonso, Carlos; Rodríguez‐Maroto, José Miguel; Garcı́a-Herruzo, Francisco; Gómez-Lahoz, César

doi:10.1080/10934529.2019.1579523

Cited by 23 publications

(12 citation statements)

References 35 publications

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“…The addition of food waste also indicated an improvement in the diversity and reproducibility of the microbial communities, specifically hydrolytic and fermentative bacteria, syntrophic bacteria, and methanogenic archaea which also improved stability (Orellana et al, 2019). Fruit and vegetable waste co-digested with sludge under mesophilic anaerobic conditions with results indicating a maximum specific methane production of 0.445 m3/kgVS for a fruit and vegetable waste to municipal sludge ratio of 40:60; an increase in the VSS removal from 38.7% to 82% was also noted (Arhoun et al, 2019).…”

Section: Digestionmentioning

confidence: 90%

Residuals, sludge, and biosolids: Advancements in the field

Brisolara

Gentile

Puszykowski

et al. 2020

Water Environment Research

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Advancements in the field of residuals, sludge, and biosolids have been made in 2019. This review outlines the major contributions of researchers that have been published in peer-reviewed journals and conference proceedings throughout 2019 and includes brief summaries from over 125 articles. The review is organized in sections including life cycle and risk assessments; characteristics, quality, and measurement including micropollutants, nanoparticles, pathogens, and metals; sludge treatment technologies including dewatering, digestion, composting, and wetlands; disposal and reuse including adsorbents, land application and agricultural uses, nutrient recovery, and innovative uses; odor and air emissions; and energy issues.

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Section: Digestionmentioning

confidence: 90%

Residuals, sludge, and biosolids: Advancements in the field

Brisolara

Gentile

Puszykowski

et al. 2020

Water Environment Research

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“…Specifically, the digester stability was evaluated using two indicators, namely, the ratio of volatile fatty acid to total alkalinity (TVFA/TA) and the ratio of intermediate to partial alkalinity (IA/PA). In order to maintain the digester stability, the TVFA/TA ratio should be maintained below 0.4-0.5, whereas IA/TA should be kept below 0.3-0.4 [15,26,27]. As shown in Figure 5, the values of both stability indicators were maintained below 0.4 for the first 2 weeks of the trial.…”

Section: Semicontinuous Experimentsmentioning

confidence: 99%

Enzymatic Pretreatment of Byproducts from Soapstock Splitting and Glycerol Processing for Improvement of Biogas Production

Borowski

Cieciura-Włoch

2021

Molecules

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This study investigated acid splitting wastewater (ASW) and interphase (IF) from soapstock splitting, as well as matter organic non glycerol (MONG) from glycerol processing, as potential substrates for biogas production. Batch and semicontinuous thermophilic anaerobic digestion experiments were conducted, and the substrates were preliminary treated using commercial enzymes kindly delivered by Novozymes A/C. The greatest enhancement in the batch digestion efficiency was achieved when three preparations; EversaTransform, NovoShape, and Lecitase were applied in the hydrolysis stage, which resulted in the maximum methane yields of 937 NL/kg VS and 915 NL/kg VS obtained from IF and MONG, respectively. The co-digestion of 68% ASW, 16% IF, and 16% MONG (wet weight basis) performed at an organic loading rate (OLR) of 1.5 kg VS/m3/day provided an average methane yield of 515 NLCH4/kg VSadded and a volatile solid reduction of nearly 95%. A relatively high concentration of sulfates in the feed did not significantly affect the digestion performance but resulted in an increased hydrogen sulfide concentration in the biogas with the peak of 4000 ppm.

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“…In contrast, IA is the difference between TA and PA and corresponds to the buffer capacity of the non-protonated forms of VFAs. Alkalinity titrated down to 5.75 pH value is defined as a PA, whereas TA is titrated to 4.30 [20,26]. Some authors have reported 2000-4000 mg of CaCO 3 L −1 PA values as typical for properly performing digesters under mesophilic conditions and feeding organic solid waste [11,27,28].…”

Section: Ph Alkalinity and Volatile Fatty Acids Concentrationmentioning

confidence: 99%

Anaerobic Digestion of Organic Solid Waste: Challenges Derived from Changes in the Feedstock

Trujillo-Reyes¹,

Cuéllar²,

Jeison³

et al. 2023

Solid Waste and Landfills Management - Recent Advances

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Over the years, research on the anaerobic digestion of solid waste has mainly focused on single feedstocks with a fixed composition. Nevertheless, the impact assessment that drastic changes in the type and composition of feedstock might have on AD process stability has not been investigated in depth. The existence of a wide variety of organic solid waste whose generation and composition are highly dependent on seasonality, just as the possibility of using treatment plant facilities already in operation for treating new waste, makes it necessary to improve our knowledge of transitory states in AD. This chapter aims to provide insight into research on transitory states during the AD process when the type or composition of the feedstock has suffered a change to assess whether the AD process was finally able to adapt to system disturbances. Information about process stability control and microbial population adaptation, among others, derived from the transition states will be addressed.

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Anaerobic co-digestion of municipal sewage sludge and fruit/vegetable waste: effect of different mixtures on digester stability and methane yield

Cited by 23 publications

References 35 publications

Residuals, sludge, and biosolids: Advancements in the field

Residuals, sludge, and biosolids: Advancements in the field

Enzymatic Pretreatment of Byproducts from Soapstock Splitting and Glycerol Processing for Improvement of Biogas Production

Anaerobic Digestion of Organic Solid Waste: Challenges Derived from Changes in the Feedstock

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