Importance of storage time in mesophilic anaerobic digestion of food waste

Lü, Fan; Xu, Xiaoguang; Shao, Liming; He, Pinjing

doi:10.1016/j.jes.2015.11.019

Cited by 34 publications

(15 citation statements)

References 29 publications

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“…Compared to Nilsson Påledal et al [16] and Lü et al [17], the effect of storage on BMP was quite different. In the case of Nilsson Påledal et al [16], BMP values of stored FW remained stable along the experiment when the storage occurred in plastic bags or at 6 °C.…”

Section: Biomethane Potentialscontrasting

confidence: 58%

“…The average values and standard deviations were 148 ± 9, 157 ± 11 and 159 ± 12 g/kg ww for trials 10 L-FW1, 10 L-FW 2 and 300 L-FW 2 , respectively. Lü et al [17] observed different results when studying FW storage. After 12 days, TS and VS contents were significantly higher than at the beginning of the experiment with respective values of 241.3 and 212.9 g/kg ww initially and 281.5 and 249.0 g/kg ww at the end of the experiment.…”

Section: Solid Phasementioning

confidence: 99%

“…The collection frequency of these systems ranges between once a day to twice a month depending on the city considered [15,16] implying a nonavoidable storage period of the FW. After being delivered to the treatment plant FW is usually stored on site before AD for a time ranging between few hours and ten days [17]. Therefore, several storage steps occur from FW generation to valorization, and the spontaneous degradation of the initial waste [5] may affect the AD process.…”

Section: Introductionmentioning

confidence: 99%

“…In this case, BMP value decreased from 135 to 75 NmL CH4 /g of fresh FW, a trend that was linked to the loss of water and volatile solid contents during storage. Lü et al [17] also studied the effect of storage time (0-12 days) on BMP performances with FW stored at 35 °C in small polystyrene centrifuge tubes (50 mL), without bags nor lids, but covered by perforated Parafilm to mimic anoxic conditions. In this study, a significant increase in BMP values was observed after 12 days of storage (from 285 NmL CH4 /g-VS added for unstored FW to 639 NmL CH4 /g-VS added ).…”

Section: Introductionmentioning

confidence: 99%

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Storage of Food Waste: Variations of Physical–Chemical Characteristics and Consequences on Biomethane Potential

Degueurce¹,

Picard²,

Peu³

et al. 2019

Waste Biomass Valor

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Food waste (FW) storage influences its physical-chemical characteristics and anaerobic digestion (AD) performance. In this work we present the results of two weeks long experiment where two types of FW were stored in dedicated cells (10 L and 300 L). Air was evenly flushed on the top surface of the substrates and then analyzed to identify and quantify possible gaseous emissions. Solid and liquid fractions were also periodically sampled and analyzed for total solid, volatile solid, ammonia and VFA contents. Results showed that storage initiated a hydrolysis process that modified the physical structure of FW, leading to the production of gases (CH 4 , CO 2 and ethanol) and a partly liquefied FW. Depending on experimental conditions, a fraction between 61 and 70% of the initial substrate remained solid at the end of the storage period. In the liquid phase, a large proportion of lactic acid was measured with maximum contents of 5.9 and 14.8 g/kg vs for the small-scale experiments with two different FW types and 3.0 g/kg vs for the large-scale experiment, leading to inhibition of the biomethane potential (BMP) tests. In conclusion, this work showed that when storage of FW is needed before AD, the optimal time recommended to keep a high methane yield is one week.

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Section: Biomethane Potentialscontrasting

confidence: 58%

Section: Solid Phasementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Storage of Food Waste: Variations of Physical–Chemical Characteristics and Consequences on Biomethane Potential

Degueurce¹,

Picard²,

Peu³

et al. 2019

Waste Biomass Valor

View full text Add to dashboard Cite

show abstract

“…Shift of pH to basic conditions correlated well with the documented SCFAs consumption [34] . Samples during the course of experiments were analyzed for SCFAs composition viz., acetic acid (HAc) to butyrate (HBu), propionic acid (HPr) and ethanol (EtOH) to have understanding of the change in the metabolic pathway [35][36][37][38][39] . During methanogenic process in MeCSTR, composition of metabolites varied significantly.…”

Section: Hydrogen and Ethanol Productionmentioning

confidence: 99%

Comparative analysis and improvement of the 2-CSTRs anaerobic digestion system on biofuel production

2017

International Journal of Hydrogen Energy

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A 2-CSTRs anaerobic digestion system using molasses wastewater as a biochemical substrate for fermentative bioenergy production and substrate degradation under various ethanol recovery rates was developed. The effects of ethanol recovery rates (0%-80%) and organic loading rates (OLRs; 8, 16 and 24 kgCODm-3 d-1) on bioenergy production rate (ε T) and bioenergy production yield were examined, respectively. Since the system produced a significant amount of biofuels (i.e. hydrogen, methane and ethanol), the process performance in terms of energy conversion derived from the combination of three biofuels was calculated according to production rates and combustion heat values. Recycle and reflux are the two reuse approaches for effluents in the system. A maximum HPR of 1.34 (±0.7) mol d-1 and a maximum EPR of 0.45 (±0.4) mol d-1 were observed at the OLR of 24 kgCOD m-3 d-1. Linear regression of the collection between HPR and EPR can be expressed as y=0.3182x+0.0114 (r 2 =0.9853). The highest MPR of 0.45 (±0.07) mol d-1 was obtained at the original OLR of 24 kgCOD m-3 d-1 , with an ethanol recover rate of 0%. Recycle resulted to a higher ε T and energy yield than reflux with the ethanol recover rate of 0% and 20%, respectively. This was equal to the ethanol recover rate of 50%, but lower than the ethanol recover rate of 80%; indicating that recycle would be more feasible for lower ethanol recover rates, and reflux may be more suitable with other kinds of ethanol recover rates.

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Determination of the biochemical methane potential of food waste after aerobic storage and aeration pretreatment

Oliveira

Léo

Forster‐Carneiro³

et al. 2022

Biofuels Bioprod Bioref

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Food waste represents a relevant fraction of municipal solid organic waste, and anaerobic digestion can be an eco-friendly alternative for sustainable management in a circular economy framework. One of the challenges to the implementation of anaerobic digestion is the availability of easily degradable compounds in the substrate, which can be solved by the application of pretreatment to increase methane production. In this study, the influence of aerobic storage time and forced continuous aeration pretreatment on the biochemical methane potential of food waste was evaluated. The results demonstrate an increase in the methane production concerning the total volatile solids (TVS) of food waste stored for 7 days (425 NmL CH 4 g −1 TVS) compared with fresh samples without pretreatment (375 NmL CH 4 g −1 TVS). The adoption of forced and continuous aeration pretreatment on food waste for 4 days produced 456 NmL CH 4 g −1 TVS for the leachate, 1.22-fold higher than that for the food waste without storage. In conclusion, the application of aeration pretreatment previous to anaerobic digestion can be an alternative to increase the methane potential from food waste.

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Importance of storage time in mesophilic anaerobic digestion of food waste

Cited by 34 publications

References 29 publications

Storage of Food Waste: Variations of Physical–Chemical Characteristics and Consequences on Biomethane Potential

Storage of Food Waste: Variations of Physical–Chemical Characteristics and Consequences on Biomethane Potential

Comparative analysis and improvement of the 2-CSTRs anaerobic digestion system on biofuel production

Determination of the biochemical methane potential of food waste after aerobic storage and aeration pretreatment

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