Full scale process design for energy recovery from apple waste at the Epleblomsten juice factory
DOI:
https://doi.org/10.15626/Eco-Tech.2007.035Keywords:
Apple waste; Biagas; Design; Energy,Abstract
The aim of this project was to design a biogas process to recovery energy from the apple
waste for Epleblomsten juice factory, The apple waste was proposed to be treated by
extracting a liquid with high organic content from the solid apple waste and treating this
leachate, From other studies the apple waste leachate organic content had been found to be in
the range from 80 to 180 kg COD/m3
_ These values and information regarding the leachate
composition were used to design and simulate various full scale processes, The factory energy
requirement was estimated at 400 kWh during full production and reactor was designed and
simulated at the various leachate concentrations to produce enough energy to meet the
demand of the factory, It was found that a traditional completely stirred mixed reactor (CSTR)
required a volume of-74 m3 to produce enough biogas for the energy demand while a UASB
reactor of 18,5 m3 volume was detem1ined capable of producing the same peak biogas
demand, The UASB process requires a relatively particle free feed, obtained by extracting a
leachate from the solids, It is therefore concluded that a high efficiency biogas process can be
obtained by treating leachate instead of the whole waste slurry, It was also theoretically
determined that the biogas from the waste leachate can meet the factory energy demand all
year around and energy (biogas) production rates could be adjusted by adjusting the feed of
leachate to the reactor,
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References
Song, Y,, Greer, T, Li, Y., Wu, W,, Botheju, D., Bakke, R,, 2007, Biogas Potential from Apple Waste, Telemark University College, Porsgrunn,
Tchobanoglous, G., Burton, F., Stensel, D., 2003. Wastewater Engineering: Treatment and Reuse, Metcalf and Eddy. 4th edition, McGraw Hill, Boston, p 993, p 985, p 1009.
Batstone, DJ., Keller, J,, Angelidaki, L, Kalyuzhnyi, S.Y,, Pavlostathis, S.G,, Rozzi, A,, Sanders, WT.M., Siegrist, H,, Yavilin, V,A,, 2002, Anaerobic Digestion Model No, I (ADM/), lWA Task Group for Mathematical Modelling of Anaerobic Digestion Processes. IW A publishing, London,
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Copyright (c) 2007 Timothy Greer , Yuan Song, Wenjun Wu, Deshai Botheju , Rune Bakke
This work is licensed under a Creative Commons Attribution 4.0 International License.
