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Determining the Optimum Proportions of Cassava Starch Wastewater, Hydrogenic Effluent and Anaerobic Sludge for Methane Production


Paper Type 
Contributed Paper
Title 
Determining the Optimum Proportions of Cassava Starch Wastewater, Hydrogenic Effluent and Anaerobic Sludge for Methane Production
Author 
Parichat Wadjeam and Alissara Reungsang
Email 
alissara@kku.ac.th; reungsang4@gmail.com
Abstract:
The optimum proportions of cassava starch wastewater, hydrogenic effluent and anaerobic sludge for batch methane production were determined using D-optimal mixture design. The optimum percentage ratio of cassava starch wastewater: hydrogenic effluent: anaerobic sludge was 7.60 : 16.67 : 75.73 at volatile solid (VS) of 60 g/L which resulted in the highest methane yield (MY) of 108.3 mL CH4/g-VS. Enhancement of methane production was attempted by supplementing with modified basal medium and modified basic anaerobic (BA) medium. Addition of modified BA medium enhanced MY by 8.28% (113.7 mL CH4/g-VS) in comparison to a control (without media addition). However, no improvement in MY was observed when using modified basal medium. Replacement of yeast extract by soybean and fish meal at the same total nitrogen concentration in modified BA medium, the differences on MY were only 3.58 % and 4.36% , respectively, indicating that soybean and fish meal can be used as cheaper alternative organic nitrogen sources for methane production.
Start & End Page 
2609 - 2622
Received Date 
2017-11-24
Revised Date 
Accepted Date 
2018-02-14
Full Text 
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Keyword 
anaerobic digestion, renewable energy, biogas, industrial waste, co-digestion, mixture design
Volume 
Vol.45 NO.7 (November 2018)
DOI 
Citation 
Wadjeam P. and Reungsang A., Determining the Optimum Proportions of Cassava Starch Wastewater, Hydrogenic Effluent and Anaerobic Sludge for Methane Production, Chiang Mai Journal of Science, 2018; 45(7): 2609-2622.
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