Effects of alkaline solvents and heating temperatures on the solubilization and degradation of gel-forming Extracellular Polymeric Substances (EPS) extracted from aerobic granular sludge

BOU-SARKIS, Abdo; Pagliaccia, Benedetta; Ric, Audrey; Derlon, Nicolas; Paul, Etienne; Bessière, Yolaine; Girbal-Neuhauser, Elisabeth

doi:10.1016/j.bej.2022.108500

Cited by 11 publications

(2 citation statements)

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“…The total volume of protein remained changeless in the experimental process. To obtain the kinetic parameters, the MATLAB function ODE45 was used to solve the ordinary differential equations ( 1)- (5). Based on the Laplace transformation, the transformed results were equations ( 6)- (9).…”

Section: Kinetic Parametersmentioning

confidence: 99%

“…Wastewater treatment plants produce a large number of excess sludge in sewage treatment every year. Its treatment and disposal pose a signi cant challenge to the operation of wastewater treatment plants ( Bou-Sarkis et al, 2022). The composition of residual sludge is very complex, including microorganisms, organic matter, extracellular polymers (EPS) and inorganic salts (Christensen et al, 2015;Zhang et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Kinetics of protein extraction from excess sludge by thermal alkaline treatment

Hui

Jin

2022

Preprint

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Protein can be extracted effectively from excess sludge by thermal alkaline process. During the extraction process, insoluble protein in sludge was turned into soluble protein, and part of the soluble protein was hydrolyzed into peptide. Then part of the soluble protein and peptide were degraded into amino acids, generating by-products: water, carbon dioxide and ammonium. Therefore, to obtain the maximum concentration of soluble protein, it is necessary to establish a kinetic model describing the process of sludge protein extraction. The report indicated that the extraction mechanism of sludge protein was according to first-order continuous reaction kinetic. A kinetic model of the reaction was established to explain the relationship between the rate constant, temperature and hydrolysis time of the first-order reaction. The optimum conditions were as follows: 0.1 M NaOH, reaction temperature 70°C, hydrolysis time 4 h. Protein separated and obtained from sludge hydrolysate by centrifugation and filtration, which could be used as a feed additive or foaming agent.

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Section: Kinetic Parametersmentioning

confidence: 99%