Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Carboxylic Acid Production from Kitchen Waste and Sewage Sludge Digestate Inoculation via Acidogenic Fermentation at High Organic Load
https://orcid.org/0000-0002-0799-7128
Abstract The research interest about the volatile fatty acid (VFA) formation from food or kitchen waste are significantly increasing from the last few years. Assisting the ongoing tendency, in this work, kitchen waste as low-cost carbon source was treated by acidogenic fermentation with sewage sludge digestate as inoculum for VFA production. Due to the remarkable amount of kitchen waste generated annually, investigations were made at high organic loads that simulate favourable practical needs due to the higher volumetric efficiency. Information was obtained about the pH related VFA profiles, unpretreated sludge addition, batch and fed-batch operation. Without pH control, the low pH conditions (under pH 5.5) led mostly to acetic (60.2%), isobutyric (21.7%) and propionic acids (16.8%). Relatively high VFA yield (0.31 g TVFA g-1 VS) with the domination of n-butyric acid was reached by daily pH elevation to 6.0 in the fourth day. Unpretreated inoculum addition showed higher hexanoic acid production (0.055 g g− 1 VS). In the case of fed-batch operations, VFA content and yield could be increased. Based on the results, further research directions were identified, and the potential of kitchen waste as a cheap feedstock for VFA production through acidogenic fermentation, even at elevated organic loads, was demonstrated.
Highlights VFA production at high organic loads were tested using real kitchen waste. Without pH regulation acetic, isobutyric and propionic acid were predominant. Daily regulated pH to 5.5 was beneficial for n-butyric acid and total VFA synthesis. Fed-batch operation increased the VFA concentration and the total VFA yield. Enhanced hexanoic acid production was noted with unpretreated digestate addition.
Carboxylic Acid Production from Kitchen Waste and Sewage Sludge Digestate Inoculation via Acidogenic Fermentation at High Organic Load
https://orcid.org/0000-0002-0799-7128
Abstract The research interest about the volatile fatty acid (VFA) formation from food or kitchen waste are significantly increasing from the last few years. Assisting the ongoing tendency, in this work, kitchen waste as low-cost carbon source was treated by acidogenic fermentation with sewage sludge digestate as inoculum for VFA production. Due to the remarkable amount of kitchen waste generated annually, investigations were made at high organic loads that simulate favourable practical needs due to the higher volumetric efficiency. Information was obtained about the pH related VFA profiles, unpretreated sludge addition, batch and fed-batch operation. Without pH control, the low pH conditions (under pH 5.5) led mostly to acetic (60.2%), isobutyric (21.7%) and propionic acids (16.8%). Relatively high VFA yield (0.31 g TVFA g-1 VS) with the domination of n-butyric acid was reached by daily pH elevation to 6.0 in the fourth day. Unpretreated inoculum addition showed higher hexanoic acid production (0.055 g g− 1 VS). In the case of fed-batch operations, VFA content and yield could be increased. Based on the results, further research directions were identified, and the potential of kitchen waste as a cheap feedstock for VFA production through acidogenic fermentation, even at elevated organic loads, was demonstrated.
Highlights VFA production at high organic loads were tested using real kitchen waste. Without pH regulation acetic, isobutyric and propionic acid were predominant. Daily regulated pH to 5.5 was beneficial for n-butyric acid and total VFA synthesis. Fed-batch operation increased the VFA concentration and the total VFA yield. Enhanced hexanoic acid production was noted with unpretreated digestate addition.
Carboxylic Acid Production from Kitchen Waste and Sewage Sludge Digestate Inoculation via Acidogenic Fermentation at High Organic Load
https://orcid.org/0000-0002-0799-7128
Abstract The research interest about the volatile fatty acid (VFA) formation from food or kitchen waste are significantly increasing from the last few years. Assisting the ongoing tendency, in this work, kitchen waste as low-cost carbon source was treated by acidogenic fermentation with sewage sludge digestate as inoculum for VFA production. Due to the remarkable amount of kitchen waste generated annually, investigations were made at high organic loads that simulate favourable practical needs due to the higher volumetric efficiency. Information was obtained about the pH related VFA profiles, unpretreated sludge addition, batch and fed-batch operation. Without pH control, the low pH conditions (under pH 5.5) led mostly to acetic (60.2%), isobutyric (21.7%) and propionic acids (16.8%). Relatively high VFA yield (0.31 g TVFA g-1 VS) with the domination of n-butyric acid was reached by daily pH elevation to 6.0 in the fourth day. Unpretreated inoculum addition showed higher hexanoic acid production (0.055 g g− 1 VS). In the case of fed-batch operations, VFA content and yield could be increased. Based on the results, further research directions were identified, and the potential of kitchen waste as a cheap feedstock for VFA production through acidogenic fermentation, even at elevated organic loads, was demonstrated.
Highlights VFA production at high organic loads were tested using real kitchen waste. Without pH regulation acetic, isobutyric and propionic acid were predominant. Daily regulated pH to 5.5 was beneficial for n-butyric acid and total VFA synthesis. Fed-batch operation increased the VFA concentration and the total VFA yield. Enhanced hexanoic acid production was noted with unpretreated digestate addition.
Carboxylic Acid Production from Kitchen Waste and Sewage Sludge Digestate Inoculation via Acidogenic Fermentation at High Organic Load
Waste Biomass Valor
Rózsenberszki, Tamás (Autor:in) / Kalauz-Simon, Veronika (Autor:in) / Fejes, Róbert (Autor:in) / Bakonyi, Péter (Autor:in) / Koók, László (Autor:in) / Kurdi, Róbert (Autor:in) / Nemestóthy, Nándor (Autor:in) / Bélafi-Bakó, Katalin (Autor:in)
18.01.2025
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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