An approach of auxiliary carbohydrate source on stabilized biohythane production and energy recovery by two-stage anaerobic process from swine manure. (12th December 2022)

• Record Type: Journal Article
• Authors: Chu, Chen-Yeon; Liu, Pin-Yi; Lai, Po-Jui; Chun-Te Lin, Justin; Sinsuw, Alicia Amelia Elizabeth
• Is Part Of: International journal of hydrogen energy. Volume 47:Number 96(2022)
• Page Start: 40603
• Page End: 40612
• Publication Date: 2022-12-12
• Subjects: Swine manure -- Two-stage anaerobic process -- Biohydrogen production -- Biomethane production -- Energy recovery; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2021.10.078
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: In this study, a two-stage biohythane production system was used to treat swine manure to solve the high Chemical Oxygen Demand (COD) concentration and verify the total energy recovery between the two-stage and a traditional single-stage system. Experiments were carried out in single-stage methane production, two-stage biohythane production in long Hydraulic Retention Time (HRT), and short HRT. The COD removal efficiency and energy recovery were finally compared between single-stage (CH4 fermenter) and two-stage (H2 + CH4 fermenter) systems. The results showed that the methane production rate of 53.2 ± 2.7 mL/d.L, the COD removal efficiency of 29.6 ± 5.8%, and total energy recovery of 2.9 ± 0.1 kJ/L.d was obtained in the single-stage of methane production system with HRT 11.08 d, pH 7, and temperature 55 °C, respectively. In the two-stage of hydrogen and methane productions system, the hydrogen production rate of 1.8 ± 0.7 mL/d.L, the methane production rate of 65.7 ± 2.5 mL/d.L, the COD removal rate was 97.8 ± 1.7%, and the total energy recovery of 3.6 ± 0.1 kJ/L.d was obtained and stabilized when the sugary wastewater content gradually reduced to 0%. This study shows that the methane production rate increases 20%, COD removal efficiency increases to 97.8 ± 1.7%, and total energy recovery increases 30%. At the same time, the single-stage (CH4 fermenter) switched to a two-stage (H2 + CH4 fermenter) system. The two-stage anaerobic biohythane production system successfully treated the high organic swine manure and obtained a higher energy recovery against the traditional single-stage of the biomethane production system. Highlights: A two-stage biohythane production system was used to treat high COD swine manure. The COD removal increased to 97.8%, and total energy recovery increased 30%. Higher energy recovery can be obtained and increased the diversity of waste treatment. To verify the total energy recovery in a two-stage higher than in a single-stage digester.