Biogas Generation from Liquid Waste of Tapioca Starch Processing via a Single Stage of Anaerobic Digestion and Microbial Electrolysis Cell: The Effect of Trace Element Iron Addition

Bianca Amartya Prabowo; Iqbal Syaichurrozi; Achmad Faizal Ibrahim; Farhan Fadlurohman Tsaqif; Muhamad Ariel Satria; Muhammad Doni Fachriza; Alia Badra Pitaloka

doi:10.33795/jtkl.v10i1.8807

Authors

Bianca Amartya Prabowo Department of Chemical Engineering, Faculty of Engineering, Universitas Sultan Ageng Tirtayasa, Jl. Jendral Soedirman Km 3, Cilegon, 42435, Indonesia
Iqbal Syaichurrozi Department of Chemical Engineering, Faculty of Engineering, Universitas Sultan Ageng Tirtayasa, Jl. Jendral Soedirman Km 3, Cilegon, 42435, Indonesia
Achmad Faizal Ibrahim Department of Chemical Engineering, Faculty of Engineering, Universitas Sultan Ageng Tirtayasa, Jl. Jendral Soedirman Km 3, Cilegon, 42435, Indonesia
Farhan Fadlurohman Tsaqif Department of Chemical Engineering, Faculty of Engineering, Universitas Sultan Ageng Tirtayasa, Jl. Jendral Soedirman Km 3, Cilegon, 42435, Indonesia
Muhamad Ariel Satria Department of Chemical Engineering, Faculty of Engineering, Universitas Sultan Ageng Tirtayasa, Jl. Jendral Soedirman Km 3, Cilegon, 42435, Indonesia
Muhammad Doni Fachriza Department of Chemical Engineering, Faculty of Engineering, Universitas Sultan Ageng Tirtayasa, Jl. Jendral Soedirman Km 3, Cilegon, 42435, Indonesia
Alia Badra Pitaloka Department of Chemical Engineering, Faculty of Engineering, Universitas Sultan Ageng Tirtayasa, Jl. Jendral Soedirman Km 3, Cilegon, 42435, Indonesia

DOI:

https://doi.org/10.33795/jtkl.v10i1.8807

Keywords:

anaerobic digestion, biogas, microbial electrolysis cell, tapioca liquid waste

Abstract

The industries of tapioca starch processing result in a substantial amount of liquid waste (TSPW), characterized by high concentrations of organic compounds. Because of its chemical oxygen demand (COD), the tapioca wastewater is not permitted to be thrown away directly into the surrounding. The new method of combination of anaerobic digestion (AD) and microbial electrolysis cell (MEC) is proposed to be applied to convert COD in the tapioca wastewater to biogas. The main objective of this study is to examine the impact of FeCl₃ addition on MEC-AD performance in converting tapioca wastewater to biogas. The FeCl₃ dose varied to 0 (control), 200, 400, 600, and 800 mg/L. The results revealed that FeCl₃ doses of 0, 200, 400, 600, and 800 mg/L generated total biogas yields of 197.1, 276.11, 261.2, 239.48, and 202.2 mL/g-COD_added, respectively. Then, the FeCl₃ doses of 0, 200, 400, 600, and 800 mg/L achieved COD removals of 62, 71, 66, 65, and 63%, respectively. Furthermore, the FeCl₃ doses of 0, 200, 400, 600, and 800 mg/L had total solid (TS) removals of 33, 51, 48, 35, and 27%, respectively. Hence, the optimal FeCl₃ dose in MEC-AD of tapioca wastewater is 200 mg/L. Through the modified Gompertz model, the FeCl₃ dose of 200 mg/L had the highest value (275.94 mL/g-COD_added) and the highest value (186.61 mL/g-COD_added/day).

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