Biochemical and microbial changes reveal how aerobic pre-treatment impacts anaerobic biodegradability of food waste

Fisgativa, Henry; Trémier, Anne; Saoudi, Mohamed Amine; Roux, Sophie; Dabert, Patrick

doi:10.1016/j.wasman.2018.09.011

Cited by 13 publications

(7 citation statements)

References 42 publications

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“…Because their experiment was performed in small-scale reactors (50 mL centrifuge tube) with grinded FW, the results are hardly comparable to the present study and differences are attributed to the scaling. Storage of FW at equivalent scale was studied by Fisgativa et al [20] and showed consistent results with the present study. In this case, FW was stored during 4 days at room temperature at four different oxygen concentrations (0, 5, 10 and 20%) and BMP values significantly decreased of 7% after 4 days of storage.…”

Section: Biomethane Potentialssupporting

confidence: 92%

“…However, because all samples were prepared following the same method, the possible artifact is equally transmitted to samples, making the comparison between samples possible. Moreover, this method was already tested on FW [20] and showed consistent results compared to the average BMP values of 460 L/kg VS calculated worldwide [21].…”

Section: Biomethane Potential Measurementssupporting

confidence: 56%

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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 Potentialssupporting

confidence: 92%

Section: Biomethane Potential Measurementssupporting

confidence: 56%

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

“…Applying advanced sequencing methods and transcriptome based methods to experimentation could reveal which microbial processes were encouraged under specific process conditions. For example, application of high throughput sequencing of 16S rRNA to microbial communities subjected to different pretreatment conditions (oxygen concentrations between 0 and 21%) of food waste revealed that important shifts in the microbial community occurs both in the initial phases of pretreatment and after conditions were established (Fisgativa et al, 2018). Further, co-registration of community composition with environmental analyses showed that while the pretreatment was being established during day one, oxygen was not the only environmental parameter to impact community composition (Fisgativa et al, 2018).…”

Section: Deeper Understanding Of Ch 4 N 2 O and H 2 S Production And Emissions In Landfills Anaerobic Digestion And Composting Environmementioning

confidence: 99%

“…For example, application of high throughput sequencing of 16S rRNA to microbial communities subjected to different pretreatment conditions (oxygen concentrations between 0 and 21%) of food waste revealed that important shifts in the microbial community occurs both in the initial phases of pretreatment and after conditions were established (Fisgativa et al, 2018). Further, co-registration of community composition with environmental analyses showed that while the pretreatment was being established during day one, oxygen was not the only environmental parameter to impact community composition (Fisgativa et al, 2018). Fisgativa et al (2018) established that higher degrees of aeration both rapidly and deeply impacted the microbial community, shifting the organisms from an initial dominance of lactic acid bacteria toward VFA consumers, as the conditions favored a decrease in simple carbohydrates and VFA, and an increase in higher molecular weight compounds over the course of the experiment.…”

Section: Deeper Understanding Of Ch 4 N 2 O and H 2 S Production And Emissions In Landfills Anaerobic Digestion And Composting Environmementioning

confidence: 99%

“…Further, co-registration of community composition with environmental analyses showed that while the pretreatment was being established during day one, oxygen was not the only environmental parameter to impact community composition (Fisgativa et al, 2018). Fisgativa et al (2018) established that higher degrees of aeration both rapidly and deeply impacted the microbial community, shifting the organisms from an initial dominance of lactic acid bacteria toward VFA consumers, as the conditions favored a decrease in simple carbohydrates and VFA, and an increase in higher molecular weight compounds over the course of the experiment. These experiments could fuel interest in engineering microbial consortia optimized for better waste decomposition during anaerobic digestion.…”

Section: Deeper Understanding Of Ch 4 N 2 O and H 2 S Production And Emissions In Landfills Anaerobic Digestion And Composting Environmementioning

confidence: 99%

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A Review of Landfill Microbiology and Ecology: A Call for Modernization With ‘Next Generation’ Technology

2020

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Engineered and monitored sanitary landfills have been widespread in the United States since the passage of the Clean Water Act (1972) with additional controls under RCRA Subtitle D (1991) and the Clean Air Act Amendments (1996). Concurrently, many common perceptions regarding landfill biogeochemical and microbiological processes and estimated rates of gas production also date from 2 to 4 decades ago. Herein, we summarize the recent application of modern microbiological tools as well as recent metadata analysis using California, USEPA and international data to outline an evolving view of landfill biogeochemical/microbiological processes and rates. We focus on United States landfills because these are uniformly subject to stringent national and state requirements for design, operations, monitoring, and reporting. From a microbiological perspective, because anoxic conditions and methanogenesis are rapidly established after daily burial of waste and application of cover soil, the >1000 United States landfills with thicknesses up to >100 m form a large ubiquitous group of dispersed 'dark' ecosystems dominated by anaerobic microbial decomposition pathways for food, garden waste, and paper substrates. We review past findings of landfill ecosystem processes, and reflect on the potential impact that application of modern sequencing technologies (e.g., high throughput platforms) could have on this area of research. Moreover, due to the ever evolving composition of landfilled waste reflecting transient societal practices, we also consider unusual microbial processes known or suspected to occur in landfill settings, and posit areas of research that will be needed in coming decades. With growing concerns about greenhouse gas emissions and controls, the increase of chemicals of emerging concern in the waste stream, and the potential resource that waste streams represent, application of modernized molecular and microbiological methods to landfill ecosystem research is of paramount importance.

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Global variability of food waste chemical composition and its consequences on the production of biofuels and chemical compounds

Abreu

Sousa

Silva

et al. 2023

J Mater Cycles Waste Manag

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Biochemical and microbial changes reveal how aerobic pre-treatment impacts anaerobic biodegradability of food waste

Cited by 13 publications

References 42 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

A Review of Landfill Microbiology and Ecology: A Call for Modernization With ‘Next Generation’ Technology

Global variability of food waste chemical composition and its consequences on the production of biofuels and chemical compounds

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