Biohydrogen Production from Co-Digestion of High Carbohydrate Containing Food Waste and Combined Primary and Secondary Sewage Sludge

Arain, Maryam; Mahar, Rasool Bux; Sahito, Abdul Razaque

doi:10.22581/muet1982.1801.12

Cited by 6 publications

(5 citation statements)

References 33 publications

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“…In samples where the inoculum was subjected to thermal pretreatment, a drop in pH was observed, favored by the production of VFAs during the DF process. Similar pH values were obtained by Pagliaccia et [19,20,26,27]. The time of thermal pretreatment had no significant impact on the final pH value.…”

Section: Changes In Phsupporting

confidence: 85%

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Influence of Inoculum Thermal Pretreatment Time on Hydrogen Production in Dark Fermentation

Domińska,

Ślęzak,

Świątkiewicz

et al. 2024

Energies

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Dark fermentation (DF) of kitchen waste (KW) is a promising technology for the production of renewable biohydrogen. It can be both a method of obtaining clean energy and a sustainable waste management. Despite its potential, this process requires further research to improve efficiency. The aim of the research was to test the effect of thermal pretreatment of the inoculum on H2 and volatile fatty acids (VFAs) production in the DF process. The process was carried out at 37 °C, in batch mode. The digested sludge from the Group Wastewater Treatment Plant in Lodz was used as inoculum. KW from households was used as substrate. The inoculum was pre-treated at 70 °C for 15 and 30 min. Two control reference experiments were also used. The first without the inoculum, and the second without heating the inoculum. The thermal pretreatment inhibited methane production and increased hydrogen production. After the thermal pretreatment, the amount of CO2 produced during the process decreased compared to the bioreactor without inoculum pretreatment. Additionally, the main VFAs in the samples with pretreated inoculum were acetic and butyric acids, which are associated with hydrogen production in the biochemical pathways of the DF process. However, the time of thermal pretreatment had no significant effect on H2 production.

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Section: Changes In Phsupporting

confidence: 85%

“…They obtained a maximum of 87 mL H 2 /g VSsubstrate , as well as 505 mL CH 4 /g VSsubstrate in the co-fermentation variant of these two substrates. In another study, Arain et al [20] checked the co-fermentation of two substrates-food waste and sewage sludge. The maximum specific hydrogen efficiency was 106.7 mL H 2 /g VSsubstrate .…”

Section: Introductionmentioning

confidence: 99%

Influence of Inoculum Thermal Pretreatment Time on Hydrogen Production in Dark Fermentation

Domińska,

Ślęzak,

Świątkiewicz

et al. 2024

Energies

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“…Similar results were obtained by (Arain et al, 2018). With an initial pH of 7, their study resulted in pH between 3.8 and 6.5 at the end of the process.…”

Section: Changes Of Phsupporting

confidence: 81%

The influence of inoculum source and pretreatment on the biohydrogen production in the dark fermentation process

Domińska,

Paździor,

Ślęzak

et al. 2024

Chemical and Process Engineering: New Frontiers

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The production of biohydrogen from food waste (FW) by dark fermentation (DF) is a promising technology for commercialisation, as it is both a clean fuel and a suitable means of sustainable waste management. The described experiments compared the biohydrogen production yields obtained after the use of inoculum from two different sources: digested sludge from the wastewater treatment plant (WWTP) in Lodz and sludge from the anaerobic treatment of dairy industry wastewater (DIW) (unconcentrated and double-concentrated). In addition, the effect of different temperatures (70, 90 and 121°C) of inoculum pretreatment on the biohydrogen production in DF was tested. The process was carried out batchwise at 37°C. The highest yield of hydrogen production was obtained after the inoculum pretreatment at 70°C. In addition, a higher amount of hydrogen could be obtained by using sludge from the WWTP as the inoculum (96 cm3 H2/gTVSFW) than unthickened sludge from the DIW (85 cm 3 H 2/g TVSFW). However, after thickening the sludge from the dairy industry, and at the same time balancing the dry matter of both sludges, the hydrogen production potential was comparable for bothsludges (for the WWTP sludge – 96 and for the DIW sludge – 93 cm 3 H 2/g TVSFW). The kinetics of hydrogen production was described by modified Gompertz equation, which showed a good fit (determination coefficient R2 between 0.909 and 0.999) to the experimental data.

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“…However, organic, easy biodegradable wastes are promising for the obtaining of energy sources, Processes 2022, 10, 170 2 of 16 especially biohydrogen [6]. Municipal and food wastes contain high concentrations of carbohydrates and can serve as substrates for anaerobic hydrogen-synthesizing bacteria [7]. As a result of such a biotechnological process, a double-positive effect is realized, i.e., the obtaining of environmentally friendly biohydrogen and degradation of carbohydratecontaining waste [8].…”

Section: Introductionmentioning

confidence: 99%

Detoxification of Copper and Chromium via Dark Hydrogen Fermentation of Potato Waste by Clostridium butyricum Strain 92

et al. 2022

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The accumulation of various types of waste containing both organic and inorganic metal-containing compounds is extremely hazardous for living organisms. The possibility of polymer degradation, biohydrogen synthesis, and metal detoxification via the dark fermentation of model potato waste was investigated. For this purpose, the strict anaerobic strain was isolated and identified as Clostridium butyricum. The high efficiency of dark hydrogen fermentation of potatoes with yield of hydrogen in 85.8 ± 15.3 L kg−1 VSpotato was observed. The copperand chromium salts solutions were added to the culture fluid to obtain the concentrations of 50, 100, and 200 mg L−1 Cu(II) and Cr(VI) in the active phase of growth (19 h of cultivation). Metals at a concentration of 200 mg L−1 inhibited the fermentation process the most. The hydrogen yield decreased in 7.2 and 3.6 times to 11.9 ± 2.1 and 23.8 ± 5.6 L kg−1 VSpotato in the presence of 200 mg L−1 Cu(II) and Cr(VI), respectively. The efficiencies of the chromium bioremoval in all variants of the experiment were 100%, and those of copper bioremoval were about 90%. A pure culture of strict anaerobes Clostridium butyricum strain 92 was used for the first time for the detoxification of metals. The presented results confirmed the possibility of this promising strain application for industrial H2 production and the bioremediation of contaminated sites.

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Biohydrogen Production from Co-Digestion of High Carbohydrate Containing Food Waste and Combined Primary and Secondary Sewage Sludge

Cited by 6 publications

References 33 publications

Influence of Inoculum Thermal Pretreatment Time on Hydrogen Production in Dark Fermentation

Influence of Inoculum Thermal Pretreatment Time on Hydrogen Production in Dark Fermentation

The influence of inoculum source and pretreatment on the biohydrogen production in the dark fermentation process

Detoxification of Copper and Chromium via Dark Hydrogen Fermentation of Potato Waste by Clostridium butyricum Strain 92

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