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Productivity of biogas production from dragon fruit branches co-digested with pig dung

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Abstract

This research aimed to appraise the promising biogas generation from dragon fruit branches co-digested with pig dung. Biochemical methane potential assay was employed for effective biogas production via the optimized ratio between branches and pig dung, the ratio between feedstock and inoculum, the ratio between solid mixture and water, the percentage of added seedings, and incubating temperatures. Each batch was operated for 17 to 22 days, depending on the quantities of branches, dung, inoculum, water, added seedings, and incubating temperature. The biogas productivity was substantially intensified in the first eight to fourteen working days before decreasing in the following days. The maximized accumulated biogas capacity (2628 mL) and biogas yield (63.71 mL/g volatile solid) were achieved under the optimal conditions of 50% branches and 50% pig dung (w/w), 1 g feedstock/2 mL inoculum, 1 g solid mixture/5 mL water, 20% added seedings, and 27 °C incubating temperature. Furthermore, this output (63.71 mL/g volatile solid) was boosted by 128.18% as compared to the biogas yield from sole dragon fruit branches at the anaerobic conditions of 1 g feedstock/1 mL inoculum, 1 g solid mixture/4 mL water, 10% added seedings, and 35 °C incubating temperature (27.92 mL/g volatile solid). Based on these outputs, dragon fruit branches are a promising material for biogas production, which gains economic profits for this plant and benefits sustainable development in green energy and waste valorization.

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Data availability

The data that support the findings of this study are available for the corresponding author upon reasonable request.

Abbreviations

BMP:

biochemical methane potential

VS:

volatile solid

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Funding

This project is granted by ARES (Belgium)–PRD 2019 “Innovation in disease control combined with the management and valorisation of dragon fruit culture waste” (Belgium–Vietnam).

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Nguyen Ngoc Thanh Tien: conceptualization, methodology, formal analysis, investigation, writing of original draft, writing including review and editing, and visualization; Hoang Gia Phuc: methodology, formal analysis, and investigation; Hai T. H. Nguyen: methodology, formal analysis, investigation, and writing including review and editing; Ngoc Lieu Le: conceptualization, methodology, validation, resources, writing including review and editing, and supervision; Tran Tien Khoi: conceptualization, resources, validation, writing including review and editing, and supervision; Aurore Richel: conceptualization, validation, resources, writing including review and editing, supervision, project administration, and funding acquisition.

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Correspondence to Nguyen Ngoc Thanh Tien, Ngoc Lieu Le, Tran Tien Khoi or Aurore Richel.

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Tien, N.N.T., Phuc, H.G., Nguyen, H.T.H. et al. Productivity of biogas production from dragon fruit branches co-digested with pig dung. Biomass Conv. Bioref. (2023). https://doi.org/10.1007/s13399-023-03902-w

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