The application of wastes from modified tapioca starch plant to produce the renewable energy using one stage anaerobic digestion system

Srivichai, Piyavadee; Rodsrida, Chumaporn

doi:10.14416/j.appsci.2020.01.010

Cited by 3 publications

(1 citation statement)

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“…Starch has to be separated from the wastewater stream prior to it reaching the treatment unit, as due to its chemical characteristics, it can cause severe operational problems in the company's wastewater treatment plant [5]. Furthermore, some reports indicate that the process of treating starch sludge in anaerobic digestion may result in the accumulation of volatile fatty acids (VFAs), leading to a decrease in pH levels [6]. Akbay et al [7] investigated the production of biogas from starch sludge and its co-digestion with other organic waste.…”

Section: Introductionmentioning

confidence: 99%

Hydrolysis Optimization of By-Products from the Potato Processing Industry and Biomethane Production from Starch Hydrolysates

Theodosi Palimeri,

Papadopoulou,

Vlyssides

et al. 2023

Sustainability

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This study aims to investigate the use of Fenton reagents for the efficient hydrolysis of starch, an industrial by-product obtained from the potato processing industry. A full factorial design experiment (FFD) was conducted and a statistical model was developed for simulating the hydrolysis process. The most important factors were the hydrolysis temperature and the amount of H2O2 followed by the interaction of FeSO4·7H2O and temperature. At maximum levels of FeSO4·7H2O (1.00g/L), H2O2 (0.51 g/L), and temperature (70.0 °C), a 99.5% hydrolysis yield was achieved, with a carbohydrate content of 28.65 g/L. Furthermore, analysis of hydrolysis kinetics demonstrated that an increased concentration of FeSO4·7H2O results in a decelerated rate of starch hydrolysis. Moreover, biodegradability tests were carried out to estimate the methane production potential from the produced hydrolysates. The specific methanogenic activity (SMA) was reached at 0.669 ± 0.014 g CH4-COD g−1 VSS day−1 proving the effectiveness of the hydrolysis process and highlighting the potential of industrial starch for bioenergy production. A preliminary cost analysis showed that a small investment for utilizing the starch in an existing wastewater treatment facility of a potato processing company becomes profitable before the end of the 3rd year, obtaining a net present value (NPV) 37.5% higher than that of the current utilization scenario.

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Section: Introductionmentioning

confidence: 99%

Hydrolysis Optimization of By-Products from the Potato Processing Industry and Biomethane Production from Starch Hydrolysates

Theodosi Palimeri,

Papadopoulou,

Vlyssides

et al. 2023

Sustainability

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Investigation of anaerobic degradability and biogas production of the starch and industrial sewage mixtures

Akbay

Deniz

Mazmancı

et al. 2022

Sustainable Energy Technologies and Assessments

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Hydrolysis Optimization of by-Products from the Potato Processing Industry and Biomethane Production from Starch Hydrolysates

Theodosi Palimeri,

Papadopoulou,

Vlyssides

et al. 2023

Preprint

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The aim of this study is to examine an efficient and environmental friendly process for hydrolyzing starch, an industrial-derived by-product of the potato processing industry, and to use the produced hydrolysates as substrates for methane production. A full factorial experiment was designed and the optimal concentrations of FeSO4·7H2O, H2O2 and temperature were determined obtaining a yield of 99.5%, with a total carbohydrates content equal to 28.65 g, when the input parameters were at their high level: FeSO4·7H2O 1.00g/L, H2O2 0.51 g/L and temperature 70.0oC. The hydrolysis kinetics were also examined revealing that temperature was the most important factor among the three optimization parameters. Furthermore, biodegradability tests were carried out to measure the methane production potential from the produced hydrolysates. The specific methanogenic activity was reached 0.669 g CODCH4/gVSS-day proving the effectiveness of the hydrolysis process and highlighting the potential of this food manufacturing by-product for bioenergy production. A preliminary cost analysis showed that a small investment for utilizing the starch in an existing wastewater treatment facility of a potato processing industry becomes profitable before the end of the 3rd year obtaining a NPV 37.5% higher than the NPV of the current utilization scenario.

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The application of wastes from modified tapioca starch plant to produce the renewable energy using one stage anaerobic digestion system

Cited by 3 publications

References 0 publications

Hydrolysis Optimization of By-Products from the Potato Processing Industry and Biomethane Production from Starch Hydrolysates

Hydrolysis Optimization of By-Products from the Potato Processing Industry and Biomethane Production from Starch Hydrolysates

Investigation of anaerobic degradability and biogas production of the starch and industrial sewage mixtures

Hydrolysis Optimization of by-Products from the Potato Processing Industry and Biomethane Production from Starch Hydrolysates

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