Effect of hydrothermal pre-treatment on physical properties and co-digestion from food waste and sewage sludge mixture

Park, Seyong; Han, Seong Kuk; Song, Eunhey; Kim, Ho; Kim, Moonil; Lee, Wonbae

doi:10.1177/0734242x19897123

Cited by 21 publications

(4 citation statements)

References 26 publications

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“…The AD batch worked for forty days in mesophilic temperature (38 °C). The assessment results that an HTP of 140°C enhances the production of biogas by 50% (Park et al, 2020) and in this research, all cases were studied under mesophilic conditions (35-37 °C) for 23 days according to Table 4 and found that R2(140) is the optimal reactor and the improvement in biogas production reaches about 29.65%. Moreover, at 160 and 180 °C, although high removal of COD occurred, the biogas production was still higher in the reactor R2(140).…”

Section: Resultsmentioning

confidence: 69%

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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: Resultsmentioning

confidence: 69%

“…There was no decrease in the pH values. This is most likely due to the reactions that occurred between ammonia and carbon dioxide, which produce bicarbonate (Park et al, 2020). The final pH values at the end of the co-digestion process were 7.23 and 7.72.…”

Section: Resultsmentioning

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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“…A standard procedure (APHA) was used to characterize the fruit waste sample (Park et al, 2020). Protein was measured using Lowry's method and carbohydrate was determined using the anthrone sulphuric acid method (Arun and Sivashanmugam, 2015).…”

Section: Methodsmentioning

confidence: 99%

Enrichment of hydrogen production from fruit waste biomass using ozonation assisted with citric acid

et al. 2021

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In this study, the impact of ozonation abetted with the citric acid pretreatment (OZCAP) method on fruit waste was investigated for ameliorating hydrogen production. Initially, the ozonation pretreatment (OZP) method was performed by varying ozone (O3) dosage and disintegration time. At optimized conditions (O3 dosage (0.04 g/g suspended solid; SS) and disintegration time (40 minutes)), 17.6% of liquefied organics emancipate rate (LER) and 13.5% of SS reduction were perceived. Further augmenting LER of fruit waste, OZCAP method was proceeded by varying citric acid dosage and disintegration time at an optimized OZP dosage (0.04 g/g SS). A higher LER (24.4%) and SS reduction (19%) were described at an optimal citric acid dosage (0.03 g/g SS) and disintegration time (20 minutes). Then, the hydrogen production potential of OZCAP, OZP and raw fruit waste were evaluated in which OZCAP method exhibited a higher cumulative hydrogen production (30 mL/g volatile solids). Energy valuation reveals that OZCAP method exhibited a net energy of 3.7 kWh/kg of fruit waste.

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“…From the calculation, the ultimate methane yield for FW and FW50 was 1033.6 mLCH4/gVS and 1657.8 mLCH4/gVS, respectively. Previous researchers found the ultimate methane yield for FW and FW50 falls in the range of 200 -900 mLCH4/gVS and 350-1200 mLCH4/gVS, respectively [13,16,34,37]. However, Seswoya et al [26] showed that the ultimate methane yield for FW was exceeded 1000 CH4/gVS.…”

Section: Ultimate Methane Yieldmentioning

confidence: 96%

Mild Thermal Pre-treatment as a Method for Increasing the Methane Potential of Food Waste

Fadzil¹,

Fadzil²,

Sulaiman³

et al. 2020

IJDNE

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It is challenging to manage the organic fraction of municipal solid waste (OFMSW) because it is putrescible. OFMSW is dominated by food waste, and food waste is easily degradable and causes unpleasant odor at the landfill. Anaerobic digestion was preferable for food waste stabilization. However, the methane production of food waste was low. This research aims to analyze the methane yield and its kinetics from the digestion of thermally treated food waste. In preparing the thermally treated food waste, the water bath at 50°C was used and operated for two hours. The biochemical methane potential (BMP) was conducted in a batch reactor. The reactor was operated at a mesophilic temperature at inoculum to substrate ratio of 2.0. The results showed that the ultimate methane yield of thermally treated food waste increased with 630 mL CH4/g VS higher than untreated food waste. The thermal pre-treatment improved the methane production rate with an increment of 9.8%. Besides, kinetic parameters observed from Modified Gompertz modeling were found lesser than laboratory observation. Despite that, thermal pre-treatment at 50°C significantly improved the digestion of food waste.

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Effect of hydrothermal pre-treatment on physical properties and co-digestion from food waste and sewage sludge mixture

Cited by 21 publications

References 26 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

Enrichment of hydrogen production from fruit waste biomass using ozonation assisted with citric acid

Mild Thermal Pre-treatment as a Method for Increasing the Methane Potential of Food Waste

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