Biofuel Produced from Solid-State Anaerobic Digestion of Dairy Cattle Manure in Coordination with Black Soldier Fly Larvae Decomposition

Choon Yong Wee and Jung-Jeng Su
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Choon Yong Wee: Department of Animal Science and Technology, National Taiwan University, Taipei 10673, Taiwan
Jung-Jeng Su: Bioenergy Research Center, College of Bio-resources and Agriculture, National Taiwan University, Taipei 10617, Taiwan

Energies, 2019, vol. 12, issue 5, 1-19

Abstract: This study was conducted to evaluate the feasibility of applying a two-step biological treatment process, solid-state anaerobic digestion (SSAD) and black soldier fly larvae (BSFL) composting, for the treatment of dairy cattle manure. Biogas from the SSAD of dairy cattle manure, and the digestate of SSAD was fed to BSFL. In turn, BSFL can be fed to animals as a protein supplement. Adjustment of the pH and 30% inoculation ratio (IR 30 ) during SSAD produced the highest theoretical methane yield, 626.1 ± 28.7 L CH 4 /kg VS des, with an ultimate methane yield of 96.81 ± 2.0 L CH 4 /kg VS load . For BSFL composting, the groups with a feeding rate of 75 and 100 mg/day/larvae had the highest body weight change, which was 969.6 ± 28.4% and 984.1 ± 177.6%, respectively. The combination process of SSAD and BSFL composting increases the incentive for dairy cattle manure treatment instead of conventional composting and produced more valuable products.

Keywords: biogas; black soldier fly; dairy cattle manure; digestate; solid-state anaerobic digestion (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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