Pre-dimensioning of Small-Scale Anaerobic Reactors of Food Waste Through Biochemical Methane Potential Assays and Kinetic Models

Parra-Orobio, Brayan Alexis; Donoso‐Bravo, Andrés; Torres–Lozada, Patricia

doi:10.1007/s12155-021-10291-3

Cited by 8 publications

(4 citation statements)

References 48 publications

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“…Therefore, the S/I ratio should consider both system stability and biogas production efficiency. Studies have shown that the S/I ratios less than 1: 1 (VS basis) are effective in preventing acidification during the AD for easily degradable FW, but this often refers to mesophilic or thermophilic anaerobic digestion, [13][14][15] not to PAD of FW. Therefore, determining the suitable S/I ratio of AD of FW at different temperatures is the key to choosing the treatment mode for FW in plateau areas.…”

Section: Introductionmentioning

confidence: 99%

Effects of temperature mode and the substrate/inoculum ratio on anaerobic digestion of Tibetan food waste

Song

Chen

Yan

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND: The research and applications of anaerobic digestion (AD) in plateau areas are limited by the specific climatic conditions (e.g., low temperature, large temperature difference). To explore feasible and economical strategies of AD in these regions, the effects of different temperature modes (constant mode: 35, 25, 15 °C; stepwise changes mode that simulated daily environmental temperature changes: 35-25 °C, 25-15 °C) and substrate/inoculum (S/I) ratios (1: 1, 1: 2, 1: 4) on Tibetan food waste (FW) digestion performance and microbial community structure were analyzed. Besides this, the energy balance of AD under different conditions was estimated. RESULTS: The methane yields (335-463 mL g −1 VS) of FW at temperature changes mode with less energy consumption could reach the same level or even slightly higher than the methane yields at 35 °C. Kinetic analysis revealed that, compared with 25 °C, methane production performance was not greatly affected by temperature fluctuations around 25 °C. The relative abundance of acetoclastic methanogens (e.g., Methanosaeta) were dominant over hydrogenotrophic methanogens (e.g., Methanobacterium, Methanospirillum) at 35 °C. The opposite was true at 15 °C. CONCLUSION:The decrease in temperature caused the digestion pathway to shift from acetoclastic to the hydrogenotrophic pathway. The effect of temperature on the microbial community structure was more pronounced than the S/I ratio. Energy balance calculations showed that psychrophilic conditions and AD without temperature control were likely to be more economically competitive than mesophilic conditions for small-scale AD in cold regions.

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Section: Introductionmentioning

confidence: 99%

Effects of temperature mode and the substrate/inoculum ratio on anaerobic digestion of Tibetan food waste

Song

Chen

Yan

et al. 2021

J of Chemical Tech & Biotech

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“…The most used methodologies to gauge biodegradability are the biochemical methane potential (BMP) assays [10,11]. These tests may also allow the determination of optimal conditions for the anaerobic process [9,12] and several factors, like pH, temperature, and substrate-inoculum ratio, that affect biogas quality [13]. In addition, the BMP assays are an effective method for selecting potential substrates for anaerobic digestion.…”

Section: Introductionmentioning

confidence: 99%

Biochemical Methane Potential Assays for Organic Wastes as an Anaerobic Digestion Feedstock

Cabrita

Santos

2023

Sustainability

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The anaerobic digestion process is applied worldwide in the treatment of various organic wastes, allowing energy production from biogas and organic recovery from digested sludge. In the evaluation of suitable substrates for anaerobic digestion, Biochemical Methane Potential assays are the most applied, and, despite several efforts to standardize this method, it is observed that there are still several studies that do not apply all the criteria. This current paper’s main goal is to present a review of anaerobic feedstocks, BMP methodologies, experimental conditions, and results of specific methane production from 2008 to 2023. A wide range of anaerobic feedstocks was found, which was divided into five groups: animal manure, sludge, food wastes, energy crops, and other organic wastes. Several parameters were used to characterize the anaerobic feedstocks, like TS, VS, COD, and pH, displaying different value ranges. The number of publications concerning BMP assays increased significantly over the years until 2021, having stabilized in the last two years. This evolution allowed for several attempts to standardize the BMP method with positive developments, but there are still some gaps in the experimental conditions and the determination of specific methane production. All of this makes the comparison of some studies a challenge.

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“…By using this method, several factors that affect the quality of biogas can be tested, such as the substrate-inoculum (S/I) ratio, pH, temperature, etc. [21].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Effect of the Application of Combined Pretreatments and Inoculum with High Alkalinity on Food Residues Through BMP Tests

2022

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The management and control of food waste is currently seen as a growing concern, anaerobic digestion is a promising alternative for the valorization of food waste. This study evaluates the effect of the application of three pretreatments (grinding, pH control, thermal treatment) and organic load control, employing a high alkalinity inoculum for methane production through BMP tests, using a Taguchi L8 experimental design of 4 factors and 2 levels, resulting in the best performance (65.91 NmL •g -1 TVS) with pretreatment conditions of grinding with fine particle size, pH 11, thermal pretreatment at 60 °C and a concentration of 14 g TVS •L -1 ,w h i c h represents an improvement of 34.66% in comparation with the food waste without pretreatments.

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Pre-dimensioning of Small-Scale Anaerobic Reactors of Food Waste Through Biochemical Methane Potential Assays and Kinetic Models

Cited by 8 publications

References 48 publications

Effects of temperature mode and the substrate/inoculum ratio on anaerobic digestion of Tibetan food waste

Effects of temperature mode and the substrate/inoculum ratio on anaerobic digestion of Tibetan food waste

Biochemical Methane Potential Assays for Organic Wastes as an Anaerobic Digestion Feedstock

Evaluation of the Effect of the Application of Combined Pretreatments and Inoculum with High Alkalinity on Food Residues Through BMP Tests

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