Evaluation of the Bio-Methane Potential of By-Products from Cassava Starch Processing
Sebastian Awiszus, Sajid Latif, Joachim Müller
University of Hohenheim, Inst. of Agricultural Sciences in the Tropics (Hans-Ruthenberg-Institute), Germany
Aim of the present study is to examine the bio-methane potential of cassava root peels and cassava pulp. The study especially focusses on trace elements essential for bacteria involved in bio-methane production process. Cassava peels from Tanzania and cassava pulp obtained from fresh cassava purchased from a local distributor in Stuttgart, Germany, were analysed regarding the content of Co, Mo, Ni, Se, Fe and Mn. Extended Weender analysis was conducted to investigate on the amount of degradable and less degradable fractions in the chosen substrates. C/N ratio as an indicator for substrate quality in terms of conditions required by methanogenic bacteria was determined. Expectable bio-methane yield was determined based on Hohenheim Biogas Yield Test (HBT) following standard VDI 4630.
Keywords: Bio-methane potential, cassava by-products, cassava starch processing, trace elements
Contact Address: Sebastian Awiszus, University of Hohenheim, Inst. of Agricultural Sciences in the Tropics (Hans-Ruthenberg-Institute), Garbenstr. 9, 70599 Stuttgart, Germany, e-mail: sebastian.awiszusuni-hohenheim.de