Upgrading volatile fatty acids production through anaerobic co-fermentation of mushroom residue and sewage sludge: Performance evaluation and kinetic analysis

Fang, Wei; Zhang, Panyue; Zhang, Tao; Requeson, David Carmona; Poser, Morgane

doi:10.1016/j.jenvman.2019.02.052

Cited by 34 publications

(9 citation statements)

References 41 publications

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“…The study by Ware et al suggested that low λ values demonstrated the simple nature and high biodegradability of the feedstocks [12]. Because the anaerobic co-digestion experiment of agricultural wastes contained a higher content of lignocellulose than the experiment of the control group (with cow manure only), the hydrolysis rate was limited [31,32]. Thus, the digestion times were affected.…”

Section: Discussionmentioning

confidence: 99%

Modeling the Methane Production Kinetics of Anaerobic Co-Digestion of Agricultural Wastes Using Sigmoidal Functions

Zhang

Cao

et al. 2021

Energies

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The modified sigmoidal bacteria growth functions (the modified Gompertz, logistic, and Richards) were used to evaluate the methane production process kinetics of agricultural wastes. The mesophilic anaerobic co-digestion experiments were conducted with various agricultural wastes as feedstocks, including cow manure, corn straw, grape leaves, vines, wine residue, strawberry leaves, and tomato leaves. The results showed that anaerobic co-digestion of cow manure and other agricultural wastes increased the methane yields while it prolonged the lag phase time. Compared with the modified Gompertz and logistic models, the modified Richards model obtained higher correlation coefficients and was able to fit experimental data better. The results of this study were expected to determine a suitable model to simulate and study the kinetic process of anaerobic co-digestion with mixed agricultural wastes as feedstocks.

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Section: Discussionmentioning

confidence: 99%

Modeling the Methane Production Kinetics of Anaerobic Co-Digestion of Agricultural Wastes Using Sigmoidal Functions

Zhang

Cao

et al. 2021

Energies

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“…These oxidation equations (11)(12)(13)(14) are the half-equations in which VFA are considered as electron donors.…”

Section: Integration Of Titration Essays Of Synthetic Solutions In Th...mentioning

confidence: 99%

“…It is therefore necessary to monitor these VFA to act on the reactor in due time in order to maintain its activity at an optimal value. This is justified in that the VFA concentration is a reliable indicator of stability or stress in the anaerobic reactor [1,4,13]. The term VFA is used to designate in general all organic acids whose carbon chains have up to 15 or 16 carbon atoms but is used more specifically in anaerobic digestion to designate only those of less than six atoms of carbon [5,14].…”

Section: Introductionmentioning

confidence: 99%

A New Mathematical Model for the Accurate Determination of Volatile Fatty Acids Concentration in Anaerobic Digesters

Nsavyimana¹,

Salvator²,

Harerimana³

et al. 2020

IJASRE

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One of the key success factors for optimal management of anaerobic digestion reactors is to control the volatile fatty acids (VFA) production. This is justified to the extent that at a concentration greater than 3000 mg/l, VFA can inhibit the methanation process. In other words, their concentration is a reliable indicator of reactor stability or stress. Several analysis methods for these VFA have been developed such as high performance liquid chromatography (HPLC), gas chromatography (GC), colorimetry and various titration techniques. The titration technique offers several advantages: it is the simplest, least expensive, fastest, and accessible to all countries, including developing countries where laboratory equipment's are generally lacking. The titration method can, therefore, be a useful tool if its reproducibility, precision and interpretation can be improved. The present study focused on the development and validation of a new simplified, the improved and accurate titrimetric method for the determination of VFA concentration, sufficiently close to chromatographic methods (GC or HPLC), considered as the gold reference method today. A mathematical model taking into account the main factors affecting the accuracy of VFA concentration in anaerobic reactors (e.g chemical species, pH, temperature, ion activity coefficients) was developed. Its validation was carried out using measurements on thirty-three different samples with this new titration method on the one hand and the gas chromatography (GC) method on the other hand. At 99% confidence interval, the VFA concentration determined using this new titration method/mathematical model were close to those obtained by the GC method with a determination coefficient R2 of 0.97.

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“…Higher SCFA production has been shown to be highly associated with more easily biodegradable organic matter in sewage sludge. [ 2 ] Additionally, substrate characteristics were reported influencing the SCFAs composition during anaerobic fermentation. Specifically, the propionate proportion decreased significantly with increasing amount of sewage sludge during co‐fermentation.…”

Section: Introductionmentioning

confidence: 99%

“…Specifically, the propionate proportion decreased significantly with increasing amount of sewage sludge during co‐fermentation. [ 2 ] Despite variations in the characteristics of sewage sludge among different WWTPs, the impact of sludge derived from different biological treatment technologies on AF has been rarely explored.…”

Section: Introductionmentioning

confidence: 99%

Enhancing short‐chain fatty acids production via acidogenic fermentation of municipal sewage sludge: Effect of sludge characteristics and peroxydisulfate pre‐oxidation

Liu,

Cheng,

et al. 2024

Biotechnology Journal

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This study first employed a combined pretreatment of low‐dose peroxy‐disulfate (PDS) and initial pH 10 to promote short‐chain fatty acids (SCFAs) production via acidogenic fermentation using different types of sewage sludge as substrates. The experimental results showed that the yield of maximal SCFAs and acetate proportion after the combined pretreatment were 1513.82 ± 28.25 mg chemical oxygen demand (COD)/L and 53.64%, and promoted by 1.28 and 1.56 times higher, respectively, compared to the sole initial pH 10 pretreatment. Furthermore, in terms of the disintegration degree of sewage sludge, it increased by more than 18% with the combined pretreatment compared to the pretreatment of sole initial pH 10. Waste‐activated sludge (WAS) from A2/O and Bardenpho processes were more biodegradable, explained by the 1.47‐ and 1.35‐times higher disintegration rate than those from oxidation ditch and they favored acetate dominant fermentation. Correlation analysis revealed a strong correlation (p ≤ 0.01) between SCFAs production and soluble COD, total proteins, proteins in soluble‐extracellular polymeric substances (SEPS), total polysaccharides, and polysaccharides in SEPS. Mechanism explorations showed that preoxidation with PDS enhanced the solubilization and biodegradability of complex substrates, and altered the microbial community structure during the fermentation process. Firmicutes and Tetrasphaera were proven to play a key role in improving SCFA production, especially in promoting acetate production by converting additional SCFAs into acetate. Additionally, the addition of PDS greatly promoted sulfur and iron‐related metabolic activities. Finally, the combined pretreatment was estimated to be a cost‐effective solution for reutilizing and treating Fe‐sludge.

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Upgrading volatile fatty acids production through anaerobic co-fermentation of mushroom residue and sewage sludge: Performance evaluation and kinetic analysis

Cited by 34 publications

References 41 publications

Modeling the Methane Production Kinetics of Anaerobic Co-Digestion of Agricultural Wastes Using Sigmoidal Functions

Modeling the Methane Production Kinetics of Anaerobic Co-Digestion of Agricultural Wastes Using Sigmoidal Functions

A New Mathematical Model for the Accurate Determination of Volatile Fatty Acids Concentration in Anaerobic Digesters

Enhancing short‐chain fatty acids production via acidogenic fermentation of municipal sewage sludge: Effect of sludge characteristics and peroxydisulfate pre‐oxidation

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