METHANE PRODUCTION BY A CO-DIGESTION OF VINASSE WITH MOLASSES AND THE KINETIC STUDIES

Authors

  • Chatchawin Nualsri คณะเทคโนโลยีการเกษตรและอาหาร มหาวิทยาลัยราชภัฏพิบูลสงคราม
  • Chakkrit Sreela-or

Keywords:

biogas, ethanol stillage, sugar production waste, renewable energy

Abstract

The objective of this study was to enhance methane production by anaerobic co-digestion of vinasse and molasses in batch fermentation. Kinetic reaction of methane production at optimum conditions was further studied in order to estimate hydraulic retention time (HRT) and organic loading rate (OLR) for continuous fermentation. Results revealed that the co-digestion of vinasse and molasses enhanced methane production efficiency and chemical oxygen demand (COD) removal efficiency in comparison to the mono-digestion of vinasse. The optimum ratio of vinasse to molasses and substrate concentration were 3:2 and 10 g-volatile solid (VS)/L, respectively. The maximum cumulative methane production and methane yield of 3,847 mL/L and 385 mL/g-VS, respectively, were obtained. COD removal efficiency of 91.59% was achieved. The study on kinetic reaction of methane production at the optimum conditions revealed that reaction rate constant (k) obtained from the first order reaction was 0.135 d-1 at the estimated HRT and OLR of 30 d and 0.34 g-VS/L.d, respectively, were obtained.

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Published

2019-01-16

How to Cite

Nualsri, C., & Sreela-or, C. (2019). METHANE PRODUCTION BY A CO-DIGESTION OF VINASSE WITH MOLASSES AND THE KINETIC STUDIES. Life Sciences and Environment Journal, 20(1), 1–11. Retrieved from https://ph01.tci-thaijo.org/index.php/psru/article/view/115649

Issue

Vol. 20 No. 1 (2019): January - June

Section

Research Articles

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Each article is copyrighted © by its author(s) and is published under license from the author(s).