Evaluation of Stability Factors in the Anaerobic Treatment of Slaughterhouse Wastewater

doi:10.4172/2155-6199.1000114

Cited by 16 publications

(17 citation statements)

References 14 publications

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“…In GluEF, the methane yield was 288.0 mL CH 4 /g COD r , which was less than the AcEF. Glucose in GluEF can be fermented by acidogenic fermentation bacteria (AFB) to produce the intermediates, such as acetate and hydrogen Reactions (8) and (9). The intermediates can be converted to methane by acetoclastic or syntrophic acetate oxidation pathways and hydrogenotrophic methanogens Reactions (2)-(4):…”

Section: Methane Yield and Electron Balancementioning

confidence: 99%

“…In addition, the physiological properties of acidogenic bacteria, such as their growth rate and susceptibility to environmental conditions, are different from those of the methanogenic archaea [4,6,7]. Therefore, the anaerobic digestion process can easily be destabilized by the imbalance between the IIET steps, even with a small external shock [7,8].…”

Section: Introductionmentioning

confidence: 99%

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Electric Field-Driven Direct Interspecies Electron Transfer for Bioelectrochemical Methane Production from Fermentable and Non-Fermentable Substrates

Song

Bae

et al. 2020

Processes

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The bioelectrochemical methane production from acetate as a non-fermentable substrate, glucose as a fermentable substrate, and their mixture were investigated in an anaerobic sequential batch reactor exposed to an electric field. The electric field enriched the bulk solution with exoelectrogenic bacteria (EEB) and electrotrophic methanogenic archaea, and promoted direct interspecies electron transfer (DIET) for methane production. However, bioelectrochemical methane production was dependent on the substrate characteristics. For acetate as the substrate, the main electron transfer pathway for methane production was DIET, which significantly improved methane yield up to 305.1 mL/g chemical oxygen demand removed (CODr), 77.3% higher than that in control without the electric field. For glucose, substrate competition between EEB and fermenting bacteria reduced the contribution of DIET to methane production, resulting in the methane yield of 288.0 mL/g CODr, slightly lower than that of acetate. In the mixture of acetate and glucose, the contribution of DIET to methane production was less than that of the single substrate, acetate or glucose, due to the increase in the electron equivalent for microbial growth. The findings provide a better understanding of electron transfer pathways, biomass growth, and electron transfer losses depending on the properties of substrates in bioelectrochemical methane production.

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Section: Methane Yield and Electron Balancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electric Field-Driven Direct Interspecies Electron Transfer for Bioelectrochemical Methane Production from Fermentable and Non-Fermentable Substrates

Song

Bae

et al. 2020

Processes

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“…The AD of proteins such as blood is characterized by increased alkalinity. Blood protein releases free NH 3 , which forms ammonium bicarbonate when it reacts with CO 2 released by the anaerobic bioreactions (Equations ( 12) and ( 13)); ammonium bicarbonate increases the alkalinity [122,123]. Cuetos et al [13] observed that blood contributes to the buffering capacity when digested with a carbohydrate-rich substrate such as OFMSW.…”

Section: Strategies Attempted For Blood Anaerobic Digestionmentioning

confidence: 99%

Anaerobic Digestion of Blood from Slaughtered Livestock: A Review

et al. 2021

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Blood from livestock slaughtering imposes a high organic pollution load and risks. If it is discharged untreated to sewer systems, it increases the organic pollution load on wastewater treatment plants by 35–50%. This paper reviews blood anaerobic digestion. It analyzes the quantities, composition, methane potential reported, microbiology, biochemical pathways of blood protein degradation, environmental and health issues, and strategies suggested to manage them during livestock blood anaerobic digestion. Although challenging, anaerobic digestion of blood as a mono-substrate is possible if the culture-reactor system is controlled based on a complete characterization and understanding of the microbial community and its metabolic activities. Co-digestion of blood and other feedstock proceeds well if the mixtures are well designed. Generally, the specific methane yield from digesting blood alone ranges between zero and 0.45 m3 kg−1 protein, whereas for co-digesting blood and other substrates, the yield varies between 0.1 and 0.7 m3 kg−1 volatile solids. More research is required for microbiology and kinetics, the role of adsorbents, reactor configuration, and culture adaptation during anaerobic digestion of blood to better control the process.

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“…El componente orgánico se refiere a materias generalmente biodegradables conducentes a la aparición y crecimiento de microorganismos con potencial patógeno (Ocampo-Vélez;Rodríguez-Montes, 2011). Por su parte, el componente inorgánico se refiere, principalmente, al uso de químicos utilizados para limpieza y desinfección de alojamientos avícolas, así como de equipos y maquinaria industrial, que deterioran la calidad física y química del agua (Padilla-Gasca;López-López;Gallardo-Valdez, 2011).…”

Section: Introductionunclassified

Elaboración de un modelo neuronal artificial para la estimación de turbiedad y proposición de dosificaciones en el tratamiento de aguas residuales de la industria avícola

Salcedo

Nuñez

2019

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Evaluation of Stability Factors in the Anaerobic Treatment of Slaughterhouse Wastewater

Cited by 16 publications

References 14 publications

Electric Field-Driven Direct Interspecies Electron Transfer for Bioelectrochemical Methane Production from Fermentable and Non-Fermentable Substrates

Electric Field-Driven Direct Interspecies Electron Transfer for Bioelectrochemical Methane Production from Fermentable and Non-Fermentable Substrates

Anaerobic Digestion of Blood from Slaughtered Livestock: A Review

Elaboración de un modelo neuronal artificial para la estimación de turbiedad y proposición de dosificaciones en el tratamiento de aguas residuales de la industria avícola

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