High-Rate Anaerobic Digestion of Waste Activated Sludge by Integration of Electro-Fenton Process
| Autor: | Sonia Khoufi, Emna Feki, Audrey Battimelli, Abdelhafidh Dhouib, Sami Sayadi |
|---|---|
| Přispěvatelé: | Centre de Biotechnologie de Sfax (CBS), Laboratoire de Biotechnologie de l'Environnement [Narbonne] (LBE), Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Qatar University, Tunisian Ministry of Higher Education and Scientific Research, International Foundation for Science (Research Grant Agreement N° W/5412-1). |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Pharmaceutical Science
02 engineering and technology 010501 environmental sciences 01 natural sciences 7. Clean energy Analytical Chemistry boue activée Bioreactors Waste Management Drug Discovery 0202 electrical engineering electronic engineering information engineering Anaerobiosis Disintegration Sewage Chemistry Chemical oxygen demand Biogas yield Pulp and paper industry biogaz 6. Clean water Biodegradation Environmental Process Engineering Chemistry (miscellaneous) Electro-Fenton Molecular Medicine prétraitement Dewaterability Digestion 020209 energy Iron digestion anaérobie Article lcsh:QD241-441 lcsh:Organic chemistry Biogas Bioenergy anaerobic digestion biogas yield waste activated sludge electro-Fenton disintegration dewaterability Anaerobic digestion [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering Waste activated sludge Physical and Theoretical Chemistry Génie des procédés 0105 earth and related environmental sciences Biological Oxygen Demand Analysis Organic Chemistry Electrochemical Techniques Hydrogen Peroxide Activated sludge Yield (chemistry) Fermentation |
| Zdroj: | Molecules Molecules, MDPI, 2020, 25 (3), ⟨10.3390/molecules25030626⟩ Molecules 3 (25), . (2020) Volume 25 Issue 3 Molecules, Vol 25, Iss 3, p 626 (2020) |
| ISSN: | 1420-3049 |
| DOI: | 10.3390/molecules25030626⟩ |
| Popis: | Anaerobic digestion (AD), being the most effective treatment method of waste activated sludge (WAS), allows for safe disposal. The present study deals with the electro-Fenton (EF) pretreatment for enhancing the WAS biogas potential with low-cost iron electrodes. The effect of pretreatment on the physicochemical characteristics of sludge was assessed. Following EF pretreatment, the pH, conductivity, soluble chemical oxygen demand (SCOD), and volatile fatty acids (VFA) increased to 7.5, 13.72 mS/cm, 4.1 g/L, and 925 mg/L, respectively. Capillary suction time (CST) analysis highlighted the dewaterability effect of EF on WAS, as demonstrated by the decrease in CST from 429 to 180 s following 30 min of pretreatment. Batch digestion assays presented an increase in the biogas yield to 0.135 L/g volatile solids (VS) after 60 min of EF pretreatment in comparison to raw sludge (0.08 L/g VS). Production of biogas was also found to improve during semi-continuous fermentation of EF-pretreated sludge conducted in a lab-scale reactor. In comparison to raw sludge, EF-pretreated sludge produced the highest biogas yield (0.81 L biogas/g VS) with a high COD removal rate, reaching 96.6% at an organic loading rate (OLR) of 2.5 g VS/L. d. Results revealed that the EF process could be an effective WAS disintegration method with maximum recovery of bioenergy during AD. |
| Databáze: | OpenAIRE |
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