Plakar G Plason Z, Kovo Abdulsalami S, Oguzie Kanayo L, Oguzie Emeka E
African Centre of Excellence in Future Energies and Electrochemical Systems (ACE-FUELS), Federal University of Technology, Owerri, PMB 1526, Imo State, Nigeria.
Department of Chemistry, Emmet A. Dennis College of Natural Sciences, Cuttington University, Gbarnga City, Liberia.
Heliyon. 2024 Dec 12;11(1):e41126. doi: 10.1016/j.heliyon.2024.e41126. eCollection 2025 Jan 15.
The management of wastewater and agricultural wastes has been limited by the separate treatment processes, which exacerbate pollution and contribute to climate change through greenhouse gas emissions. Given the energy demands and financial burdens of traditional treatment facilities, there is a pressing need for technologies that can concurrently treat solid waste and generate energy. This study aimed to evaluate the feasibility of producing bioelectricity and biohydrogen through the microbial treatment of blackwater and agricultural waste using a dual-chamber Microbial Fuel Cell (MFC). The research focused on identifying optimal feedstock ratios and pH conditions, accompanied by biochemical assays to characterize the microbial community involved. The predominant microorganisms identified included , spp., and , among others. The highest open circuit voltage achieved was 1090 mV at a hydraulic retention time (HRT) of 6 days. Maximum removal efficiencies for Chemical Oxygen Demand (COD) and Biochemical Oxygen Demand (BOD) were 90.87 % and 76.67 %, respectively, with a Columbic efficiency of 40.17 %. The peak power density measured was 345 mW/m, and the highest hydrogen yield was 483 ppm/s. The optimal feedstock ratio was found to be 3:1:1 (300 g cassava peel, 100 g banana peel, and 100 g tomato waste), with ideal pH conditions at 9.35. This study underscores the potential for generating bioelectricity and biohydrogen from the microbial treatment of mixed blackwater and agricultural wastes in a single system, eliminating the need for separate treatment and the use of external energy source. The work contributes to the advancement of environmental engineering and management, bioenergy, microbial fuel cell, and affordable and clean energy.
废水和农业废弃物的管理一直受到单独处理工艺的限制，这些工艺加剧了污染，并通过温室气体排放导致气候变化。鉴于传统处理设施的能源需求和财政负担，迫切需要能够同时处理固体废物并产生能源的技术。本研究旨在评估使用双室微生物燃料电池（MFC）通过微生物处理黑水和农业废弃物来生产生物电和生物氢的可行性。该研究重点在于确定最佳原料比例和pH条件，并通过生化分析来表征所涉及的微生物群落。鉴定出的主要微生物包括 、 属和 等。在水力停留时间（HRT）为6天时，实现的最高开路电压为1090 mV。化学需氧量（COD）和生化需氧量（BOD）的最大去除效率分别为90.87%和76.67%，库仑效率为40.17%。测得的峰值功率密度为345 mW/m，最高氢气产量为483 ppm/s。发现最佳原料比例为3:1:1（300 g木薯皮、100 g香蕉皮和100 g番茄废弃物），理想pH条件为9.35。本研究强调了在单一系统中通过微生物处理混合黑水和农业废弃物来产生生物电和生物氢的潜力，无需单独处理和使用外部能源。这项工作有助于环境工程与管理、生物能源、微生物燃料电池以及经济实惠且清洁能源等领域的发展。
