Enhanced Methanization of Long-Chain Fatty Acid Wastewater at 20°C in the Novel Dynamic Sludge Chamber–Fixed Film Bioreactor

Singh, Suniti; Holohan, B. Conall; Mills, Simon; Castilla-Archilla, Juan; Kokko, Marika; Rintala, Jukka; Lens, Piet N.L.; Collins, Gavin; O’Flaherty, Vincent

doi:10.3389/fenrg.2020.00166

Cited by 12 publications

(5 citation statements)

References 62 publications

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“…Henze et al (2008) emphasized that fat or LCFA-containing substrates typical of dairy wastewater results in high COD removal efficiencies, but not equivalent CH 4 production rates leading to considerable COD balance gaps (Henze et al, 2008). Singh et al (2019), Singh et al (2020) found that this occurrence could be explained by lipid and/or LCFA accumulation in the granules which is also associated with granules flotation and occasional wash out. Entrapment or accumulation of slowly biodegradable polymeric, colloidal and residual particulate COD in the sludge blanket have a similar effect on the COD balance (Zhang et al, 2018).…”

Section: Methane Productionmentioning

confidence: 99%

Effect of Low Temperature and Municipal Wastewater Organic Loading on Anaerobic Granule Reactor Performance

Safitri¹,

Kaster²,

Kommedal³

2022

SSRN Journal

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Section: Methane Productionmentioning

confidence: 99%

Effect of Low Temperature and Municipal Wastewater Organic Loading on Anaerobic Granule Reactor Performance

Safitri¹,

Kaster²,

Kommedal³

2022

SSRN Journal

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“…According to Singh et al. (2020), these are important intermediates formed during the anaerobic digestion of dairy fatty residues.

{Oleate}^{-} + 1.5 {normalH}_{2} \to {stearate}^{-}

{Oleate}^{-} + 2 {normalH}_{2} O \to {palmitate}^{-} + {acetate}^{-} + {normalH}_{2} + {normalH}^{+}

{Oleate}^{-} + 16 {normalH}_{2} O \to 9 {acetate}^{-} + 15 {normalH}_{2} + 8 {normalH}^{+}

{Palmitate}^{-} + 14 {normalH}_{2} O \to 8 {acetate}^{-} + 14 {normalH}_{2} + 7 {normalH}^{+}

{Stearate}^{-} + 16 {normalH}_{2} O \to 9 {acetate}^{-} + 16 {normalH}_{2} + 8 {normalH}^{+}

…”

Section: Resultsmentioning

confidence: 99%

“…The use of biogas to replace nonrenewable fuels may especially benefit rural populations that suffer most from a lack of electricity, due to socioeconomic and environmental issues. In this sense, countries like India (Singh et al., 2020; Usmani, 2020), Venezuela (López‐gonzález et al., 2019; Pietrosemoli & Rodríguez‐Monroy, 2019), Myanmar (Pode et al., 2016; Sovacool, 2013), Afghanistan (Ahmadzai & Mckinna, 2018; Rostami et al., 2017), and Azerbaijan (Vidadili et al., 2017) could benefit from using the studied process. Research evaluating low‐cost reactor configurations or the use of rural biodigesters for the anaerobic degradation of the presently studied wastes could contribute to the dissemination of the process in these countries.…”

Section: Resultsmentioning

confidence: 99%

Methane production from anaerobic digestion of dairy grease trap waste: Effect of sugarcane bagasse addition

Bueno

Henao

Rabelo

et al. 2021

Environmental Quality Mgmt

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Lipids are attractive substrates for anaerobic digestion due to their high methane production yield. However, high concentrations of lipids may cause problems in anaerobic processes. Typically, grease trap waste is mechanically removed and discharged, both generating environmental issues and wasting a potential energy source. In this study, grease trap waste from a dairy wastewater treatment plant was subjected to anaerobic digestion. Untreated and pretreated sugarcane bagasse was evaluated as fat adsorbents to reduce the inhibitory effect of the fatty waste. The bagasse pretreated by the organosolv method was the condition that most contributed to increased methane production (82%) from anaerobic digestion of dairy fatty waste at 0.5 g COD.g–1TVS concentration. Untreated bagasse provided the second‐best condition, followed by hydrothermally treated bagasse, presenting no statistical difference. The obtained results showed the potential of using sugarcane bagasse as a strategy to reduce the inhibitory effect of the fatty waste from the dairy grease trap, making this waste another possible source for generating biogas.

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“…AD of lipids at low temperatures (12–20 °C) remains seldom studied. Recently, Singh et al − showed the potential of mesophilic sludge to produce methane from a synthetic dairy wastewater containing LCFA (33% in COD) at low temperatures (10 and 20 °C) over a 150 day bioreactor trial. Petropoulos et al .…”

Section: Ad Of Lipids: a Historical Perspectivementioning

confidence: 99%

Principles, Advances, and Perspectives of Anaerobic Digestion of Lipids

Holohan

Duarte

Szabo-Corbacho

et al. 2022

Environ. Sci. Technol.

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Several problems associated with the presence of lipids in wastewater treatment plants are usually overcome by removing them ahead of the biological treatment. However, because of their high energy content, waste lipids are interesting yet challenging pollutants in anaerobic wastewater treatment and codigestion processes. The maximal amount of waste lipids that can be sustainably accommodated, and effectively converted to methane in anaerobic reactors, is limited by several problems including adsorption, sludge flotation, washout, and inhibition. These difficulties can be circumvented by appropriate feeding, mixing, and solids separation strategies, provided by suitable reactor technology and operation. In recent years, membrane bioreactors and flotation-based bioreactors have been developed to treat lipid-rich wastewater. In parallel, the increasing knowledge on the diversity of complex microbial communities in anaerobic sludge, and on interspecies microbial interactions, contributed to extend the knowledge and to understand more precisely the limits and constraints influencing the anaerobic biodegradation of lipids in anaerobic reactors. This critical review discusses the most important principles underpinning the degradation process and recent key discoveries and outlines the current knowledge coupling fundamental and applied aspects. A critical assessment of knowledge gaps in the field is also presented by integrating sectorial perspectives of academic researchers and of prominent developers of anaerobic technology.

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Enhanced Methanization of Long-Chain Fatty Acid Wastewater at 20°C in the Novel Dynamic Sludge Chamber–Fixed Film Bioreactor

Cited by 12 publications

References 62 publications

Effect of Low Temperature and Municipal Wastewater Organic Loading on Anaerobic Granule Reactor Performance

Effect of Low Temperature and Municipal Wastewater Organic Loading on Anaerobic Granule Reactor Performance

Methane production from anaerobic digestion of dairy grease trap waste: Effect of sugarcane bagasse addition

Principles, Advances, and Perspectives of Anaerobic Digestion of Lipids

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