Influence of phenols and furans released during thermal pretreatment of olive mill solid waste on its anaerobic digestion

Caroca, Eric; Serrano, Antonio; Borja, R.; Jiménez, Ana María Millán; Carvajal, Andrea; Braga, Adriana Ferreira Maluf; Rodríguez-Gutiérrez, Guillermo

doi:10.1016/j.wasman.2020.11.027

Cited by 30 publications

(11 citation statements)

References 34 publications

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“…Here, the rate-limiting stage is the hydrolysis in which complicated organic molecules are converted into smaller and simpler molecules by the extracellular enzymes of microorganisms (Deepanraj et al, 2017). It is useful to apply various pretreatment technologies like chemical, mechanical, thermal, or biological to the substrates to increase the rate of hydrolysis, to dissolve organic compounds for increasing their biodegradability, to enhance the stability of anaerobic digestion, and to increase the production of biogas (Caroca et al, 2021;Liu et al, 2020). SS and other wastes are subjected to high temperatures in the thermal pretreatment process, which cause hydrolysis and improve the digestibility of SS and other wastes (Meegoda et al, 2018;Taboada-Santos et al, 2019).…”

Section: Thermal Pre-treatmentmentioning

confidence: 99%

Anaerobic Co-Digestion of Sewage Sludge and Waste in High Solid State

Aboulfotoh¹,

Marie²,

El-hefny³

2022

J. Ecol. Eng.

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In this study, the effect of thermal pre-treatment (TP) on the physical characteristics and co-digestion of a mixture of food waste and sludge was investigated. The food waste (FW) to sewage sludge (SS) ratio used in this research is 1:2 (VS-based) to form a final concentration of 11.20%. The inoculum to substrate ratio was set at 1:1 (volumebased). Undoubtedly, the results show that TP has changed the physical characteristics of the food waste to sewage sludge mixture. The results show that the pretreatment increased the biogas production from 4385 ml for the untreated reactor to 5685 for the reactor R2(140) at 140 °C and the improvement in biogas production reaches 29.65% in the reactor R2( 140) and the removal of volatile solids was 58.90%. Therefore, after the biomethane potential test, the temperature of 140 °C was found to be optimal in the production of biogas. The optimal condition is to use a mixture of pre-treated SS at the temperature of 140 °C and untreated FW, so TP is recommended to be used in anaerobic digestion of the mixture of food waste and sewage sludge.

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Section: Thermal Pre-treatmentmentioning

confidence: 99%

Anaerobic Co-Digestion of Sewage Sludge and Waste in High Solid State

Aboulfotoh¹,

Marie²,

El-hefny³

2022

J. Ecol. Eng.

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“…The yield of the generated furans was reported as the function of temperature in most of the studies. Hemicellulose Ru-Re/biochar Hydrolysis 1 1,4-BD and THF [22] Bio-derived furans HZSM-5 Diels-Alder cycloaddition reaction 2 MF [23] Fructose Nb2O5 fructose dehydration 5-HMF [24] Xylose supported Ni Hydrodeoxygenation 3 2-MF and FF [25] Cellulose NaY Pyrolysis Furan, 2-MF, 3-MF, DMF [26] Olive mill solid waste -Anaerobic digestion HMF and FF [27] Fructose, inulin and MCC Pd, Pt, Ir, Ni, Ru Hydrolysis 2,5-DHMF [28] Monosaccharides and cellulose H 3 PO 4 and NaOH Hydrolysis-dehydration 4 HMF, FF [29] Fructose Ionic liquid-Ru/C Dehydration DMF and DMTF [30] Seaweed biomass Solid acid KHSO4 Autoclave treatment HMF [31] Glucose Ga and Sn zeolite Y catalyst Dehydration HMF [32] Carbohydrates and molasses ZnCl2/HCl and AlCl3/HCl Dehydration HMF [33] Sugarcane Bagasse -Hot Compressed Water HMF [34] cellulose, glucose, and fructose functionalized zeolites Dehydration HMF [35] Cellulose CrCl2/Zeolite/[Bmim]Cl…”

Section: Fig 1 World Energy Profile Consumption In 2018mentioning

confidence: 99%

Direct catalytic conversion of bagasse fibers to furan building blocks in organic and ionic solvents

Abdulkhani

Siahrang

Zadeh

et al. 2021

Biomass Conv. Bioref.

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The applications of lignocellulosic wastes to produce a wide variety of products, including biochemicals, biomaterials, and biofuels, can be an effective solution for utilizing these valuable waste materials. In this study, the production of furan building blocks from bagasse fibers was investigated by treating unbleached fibers with NMMO, [Bmim]Cl, and TMAH at different temperatures using AlCl3 and CrCl2 as the catalysts. The resulted liquors were extracted with CH2Cl2 to obtain furan rich fraction. Analysis of extracted fractions with GC/MS indicates the production of various furanic compounds due to catalytic solvolysis with different solvents at elevated temperatures. 2(3H)-furanone and 2-methyl-THF were the main products of catalytic treatment of bagasse fibers with NMMO. Treatment by [Bmim]Cl resulted in 2,5dihydro furanone as the dominant product at elevated temperatures. Furan carboxylic acid methyl ester and 2, 5-furan dicarboxylic acid dimethyl ester were the main TMAH reaction products with unbleached fibers. The results indicate that the type of solvent affects the solvolysis rate and dehydration of cellulose to furanic compounds. Moreover, increasing the temperature led to an increase in the formation of the furanic compounds.

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“…The incorrect management of OMSW has several deleterious environmental effects, such as coloration of natural waters, toxicity to aquatic life, degradation of soil quality by inhibiting plant germination and growth, phytotoxicity, and the generation of nuisance odors [ 21 , 22 ]. OMSW is composed of olive husk, olive pulp, and olive vegetation water, resulting in a substrate rich in lignocellulosic fibers and polyphenols [ 23 , 24 ]. Polyphenols in OMSW create a high antimicrobial activity that can hamper the valorization of this biomass through microbe-mediated processes [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

Use of Anthracophyllum discolor and Stereum hirsutum as a Suitable Strategy for Delignification and Phenolic Removal of Olive Mill Solid Waste

Benavides

Pinto-Ibieta

Serrano

et al. 2022

Foods

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This study evaluated the use of the white-rot fungi (WRF) Anthracophyllum discolor and Stereum hirsutum as a biological pretreatment for olive mill solid mill waste (OMSW). The WRF strains proposed were added directly to OMSW. The assays consisted of determining the need to add supplementary nutrients, an exogenous carbon source or use agitation systems, and evaluating WRF growth, enzyme activity, phenolic compound removal and lignin degradation. The highest ligninolytic enzyme activity was found at day 10, reaching 176.7 U/L of manganese-independent peroxidase (MniP) produced by A. discolor, and the highest phenolic removal (more than 80% with both strains) was reached after 24 days of incubation. The confocal laser scanning microscopy analysis (CLSM) confirmed lignin degradation through the drop in lignin relative fluorescence units (RFU) from 3967 for untreated OMSW to 235 and 221 RFU, showing a lignin relative degradation of 94.1% and 94.4% after 24 days of treatment by A. discolor and S. hirsutum, respectively. The results demonstrate for the first time that A. discolor and S. hirsutum were able to degrade lignin and remove phenolic compounds from OMSW using this as the sole substrate without adding other nutrients or using agitation systems. This work indicates that it could be possible to design an in situ pretreatment of the valorization of OMSW, avoiding complex systems or transportation. In this sense, future research under non-sterile conditions is needed to evaluate the competition of WRF with other microorganisms present in the OMSW. The main drawbacks of this work are associated with both the low reaction time and the water addition. However, OMSW is seasonal waste produced in one season per year, being stored for a long time. In terms of water addition, the necessary optimization will be addressed in future research.

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Influence of phenols and furans released during thermal pretreatment of olive mill solid waste on its anaerobic digestion

Cited by 30 publications

References 34 publications

Anaerobic Co-Digestion of Sewage Sludge and Waste in High Solid State

Anaerobic Co-Digestion of Sewage Sludge and Waste in High Solid State

Direct catalytic conversion of bagasse fibers to furan building blocks in organic and ionic solvents

Use of Anthracophyllum discolor and Stereum hirsutum as a Suitable Strategy for Delignification and Phenolic Removal of Olive Mill Solid Waste

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