Bacterial ecology of abattoir wastewater treated by an anaerobic digestor

Jabari, Linda; Gannoun, Hana; Khelifi, Eltaief; Cayol, Jean‐Luc; Godon, Jean‐Jacques; Hamdi, Moktar; Fardeau, Marie‐Laure

doi:10.1016/j.bjm.2015.11.029

Cited by 45 publications

(19 citation statements)

References 65 publications

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“…In the previous study comparing the diversities of these genera at the beginning of sampling and after cultivation. Desulfovibrio, Desulfobulbus, and Desulfomicrobium genus as dominant among sulfate-reducers in the bioreactors were detected [74,[87][88][89]. Desulfobulbus genus can incompletely oxidize numerous organics including glucose, propionate, and pyruvate to acetate allowing the sulfidogenic anaerobic digestion of sulfate waste from anaerobic sludge [88].…”

Section: Discussionmentioning

confidence: 99%

Microbial Communities and Sulfate-Reducing Microorganisms Abundance and Diversity in Municipal Anaerobic Sewage Sludge Digesters from a Wastewater Treatment Plant (Marrakech, Morocco)

Houari

Ranchou-Peyruse

et al. 2020

Processes

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Both molecular analyses and culture-dependent isolation were combined to investigate the diversity of sulfate-reducing prokaryotes and explore their role in sulfides production in full-scale anaerobic digesters (Marrakech, Morocco). At global scale, using 16S rRNA gene sequencing, Proteobacteria, Bacteroidetes, Firmicutes, Actinobacteria, Synergistetes, and Euryarchaeota were the most dominant phyla. The abundance of Archaea (3.1–5.7%) was linked with temperature. The mcrA gene ranged from 2.18 × 105 to 1.47 × 107 gene copies.g−1 of sludge. The sulfate-reducing prokaryotes, representing 5% of total sequences, involved in sulfides production were Peptococcaceae, Syntrophaceae, Desulfobulbaceae, Desulfovibrionaceae, Syntrophobacteraceae, Desulfurellaceae, and Desulfobacteraceae. Furthermore, dsrB gene ranged from 2.18 × 105 to 1.92 × 107 gene copies.g−1 of sludge. The results revealed that exploration of diversity and function of sulfate-reducing bacteria may play a key role in decreasing sulfide production, an undesirable by-product, during anaerobic digestion.

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Section: Discussionmentioning

confidence: 99%

Microbial Communities and Sulfate-Reducing Microorganisms Abundance and Diversity in Municipal Anaerobic Sewage Sludge Digesters from a Wastewater Treatment Plant (Marrakech, Morocco)

Houari

Ranchou-Peyruse

et al. 2020

Processes

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“…The microbial consortium present in SWW help in improved biogas yield through degradation of lignin, cellulose, and hemicellulose and utilization of reducing sugar thus produced. (Baker, Mohamed, Al‐Gheethi, & Aziz, 2020; Jabari et al, 2016; Li, Jia, et al, 2018; Li, Jin, Borrion, & Li, 2018; Pereda Reyes & Sárvári Horváth, 2015). Solid‐state anaerobic fermentation of FVW gives enhanced biogas yield and overcomes the voluminous water requirements of submerged fermentation (Li et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Valorization of fruit and vegetable waste for biofertilizer and biogas

Chakravarty

Mandavgane

2020

J Food Process Engineering

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The ubiquity of irrational disposal practices for fruit and vegetable waste (FVW) poses prohibitive environmental and economic liability. Anaerobic digestion of fruit and vegetable residues into biofertilizer is a potential solution to reduce environmental pollution and improve soil nutrition. High carbon and low nitrogen content is the main challenge in the bioprocessing of FVWs. In such cases, FVWs is co‐digested with another eco‐waste, the slaughterhouse wastewater (SWW). The issues of abattoir waste disposal are a serious threat to the societal health and hygiene. Interestingly, SWW is a house of mixed microorganisms which release enzymes for anaerobic digestion. In our present study, a two‐stage digestion process, that is, anaerobic digestion followed aerobic digestion using Trichoderma reesei is carried out under optimized conditions for enhanced biofertilizer formation. Each stage was completed in 15 days, total digestion time being 1 month. Biogas generated during the anaerobic process is 16 L/kg for fruit wastes (FWs) and 13.2 L/kg for vegetable wastes (VWs). Significant decrease in lignin up to 64% in case of FWs and 70% in case of VWs helped in cellulose degradation. The FVWs are finally reduced to a potential value‐added biofertilizer with 10–11 C: N ratio. Practical Applications Stringent wastes like fruit and vegetable waste (FVW) as well as the slaughterhouse waste were considered for bioremediation and value‐added application. A simple, rapid, unique, and easy to scale‐up technique was envisaged for conversion of FVWs into potential biofertilizer through two‐stage co‐digestion. The studies conducted will be useful for FVW management at household as well as industrial level.

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“…Hence, culture-based approaches are not appropriate for comprehensive studies of the diversity and abundance of ARGs as well as the incidence of MGEs in WWTPs (Wang et al, 2013). To date, a variety of molecular approaches have been applied to study the relationships between wastewater microbial communities and treatment process performance (Shah, 2014;Jabari et al, 2016;Gómez-Villalba, 2006;Kim et al, 2013;McIlroy et al, 2015;Ju et al, 2014). A brief summary of the most commonly used molecular techniques is provided in Table 1.1.…”

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confidence: 99%