Potential of food waste-derived volatile fatty acids as alternative carbon source for denitrifying moving bed biofilm reactors

Sapmaz, Tugba; Manafi, Reza; Mahboubi, Amir; Lorick, Dag; Köseoğlu-İmer, Derya Y.; Taherzadeh, Mohammad J.

doi:10.1016/j.biortech.2022.128046

Cited by 16 publications

(3 citation statements)

References 29 publications

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“…Due to the continuously rising environmental awareness on the excessive application consequences and resource scarcity of global oil sources, new alternative approaches such as VFA generation from low or negative value organic waste has attracted great attention. The generated VFAs through acidogenic fermentation or digestion have market demands in applications such as bioplastics and bioenergy production, external carbon sources for biological nutrient removal, and usage in pharmaceutical and food industries [11][12][13]. Different sources of organic waste including food waste [12,14,15], lignocellulosic materials [16], waste activated sludge [17,18], and various animal manures [19][20][21] have been used as feed stock for acidogenic digestion and VFAs production.…”

Section: Introductionmentioning

confidence: 99%

“…The generated VFAs through acidogenic fermentation or digestion have market demands in applications such as bioplastics and bioenergy production, external carbon sources for biological nutrient removal, and usage in pharmaceutical and food industries [11][12][13]. Different sources of organic waste including food waste [12,14,15], lignocellulosic materials [16], waste activated sludge [17,18], and various animal manures [19][20][21] have been used as feed stock for acidogenic digestion and VFAs production. The addition and type of inoculum are also essential for the effectivity of the anaerobic process because they provide the initial microbial population [22].…”

Section: Introductionmentioning

confidence: 99%

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Towards maximum value creation from potato protein liquor: volatile fatty acids production from fungal cultivation effluent

Sapmaz

Uwineza

Mahboubi

et al. 2023

Biomass Conv. Bioref.

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The cornerstones of an efficient circular waste management strategy aiming for enhanced resource efficiency are maximizing organic waste valorization and improving residual conversion to biochemicals. In this regard, this study focuses on the production of volatile fatty acids (VFAs) from the effluent of fungi biomass cultivation on low-grade residues from the potato starch industry with batch and semi-continuous membrane bioreactors (MBRs) containing the effluent of already fermented potato protein liquor (FPPL) inoculated with chicken and cow manure. The effect of pH in the batch experiments on the production and yield of VFAs during acidogenic digestion was evaluated. Rapid generation of VFAs at a concentration of up to 11.8 g/L could be successfully achieved in the MBR. Under the optimal conditions, a high yield of 0.65 g VFAs/g VSfed was obtained for the organic loading rate (OLR) of 1 g VS/L/d using FPPL substrate and chicken manure as inoculum. The results show that the application of sequential multi-step bioconversion of potato starch industry residues has the potential to increase the variety of value-added products generated from a single organic residue while enhancing nutrient recovery capacity.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Towards maximum value creation from potato protein liquor: volatile fatty acids production from fungal cultivation effluent

Sapmaz

Uwineza

Mahboubi

et al. 2023

Biomass Conv. Bioref.

Self Cite

View full text Add to dashboard Cite

show abstract

“…In addition, a complete understanding of the utilization hierarchy of different VFAs by heterotrophic bacteria in the denitrification process is still missing but would be essential to properly optimize the integration of sludge fermentation with wastewater denitrification processes. For instance, according to Elefsiniotis and Wareham [19] and Sapmaz et al [23], acetic acid is used more easily since its degradation, following the β-oxidation mechanism, produces acetyl-CoA directly. Conversely, C 3 -C 6 VFAs follow more complicated metabolic pathways, requiring sequential β-oxidation processes and leading to a lower denitrification rate or subsequent consumption with respect to acetate when using a mixed VFA substrate.…”

Section: Introductionmentioning

confidence: 99%

Denitrification Capacity of Volatile Fatty Acids from Sludge Fermentation: Lab-Scale Testing and Full-Scale Assessment

Grana,

Catenacci,

Ficara

2023

Fermentation

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This work provides insights into the possibility of integrating recovered volatile fatty acids (VFAs) into biological nitrogen removal processes. VFAs are the main products of the acidogenic fermentation of waste sludge and are an effective carbon source for denitrification in activated sludge processes. The assessment of denitrification rates and the utilisation hierarchy of different VFAs are relevant to evaluating the possibility of replacing external carbon sources with the fermented liquid, FL, from acidogenic fermentation. To this scope, single VFAs, FL collected from a full-scale waste sludge fermenter, and commercial hydroalcoholic solutions have been tested with manometric lab-scale tests. Regarding single acids, acetic acid showed the highest denitrification rates, up to 4 mg N-NO3 g VSS−1 h−1, while more complex acids usually showed a lower denitrification rate. The synthetic VFA mixture and FL showed a higher denitrification rate than the sole acetate (up to 134% of the acetate denitrification rate). Mass balances across the full-scale wastewater treatment plant demonstrated the positive role of FL dosage in enhancing the denitrification process in the activated sludge treatment, with an average nitrogen removal equal to 57% and 78% without and with FL dosage, respectively. Batch manometric tests proved to be an efficient and reliable tool to assess the quality of the carbon sources as well as the activity of denitrifying bacteria in activated sludge samples.

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Enhancing Volatile Fatty Acids Recovery Through Nanofiltration: A Sustainable and Efficient Solution Within the Circular Economy

Cairone,

Mahboubi,

Zarra

et al. 2024

Lecture Notes in Civil Engineering

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Potential of food waste-derived volatile fatty acids as alternative carbon source for denitrifying moving bed biofilm reactors

Cited by 16 publications

References 29 publications

Towards maximum value creation from potato protein liquor: volatile fatty acids production from fungal cultivation effluent

Towards maximum value creation from potato protein liquor: volatile fatty acids production from fungal cultivation effluent

Denitrification Capacity of Volatile Fatty Acids from Sludge Fermentation: Lab-Scale Testing and Full-Scale Assessment

Enhancing Volatile Fatty Acids Recovery Through Nanofiltration: A Sustainable and Efficient Solution Within the Circular Economy

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