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Self-sustained photocatalytic power generation using eco-electrogenic engineered systems
Dileep Kumar Yeruva1, P Chiranjeevi1, Sai Kishore Butti1
1Bioengineering and Environmental Sciences Lab, EEFF Centre, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India; Academy of Scientific and Innovative Research (AcSIR), Hyderabad, India.
Abstract:
An eco-electrogenic engineered system (EES) was designed to mimic the functional role of natural aquatic ecosystems and evaluated their response to bio-electrogenic activity by cascadically interlinking three tanks with functionally diverse biota viz., floating macrophytes (Tank 1), submerged plants (Tank 2) and filter feeders (fish and snails) (Tank 3). Tank 1 showed efficient power generation (voltage (series): 0.86 V; current density (parallel): 37 mA/m2) than Tank 2 (voltage (series): 0.76 V; current density (parallel): 34 mA/m2) and Tank 3 (voltage (series): 0.65 V; current density (parallel): 22 mA/m2). Integrating all three tanks enabled maximum power generation in parallel-series (P-S) connection (9.5 mW/m2) than individual series and parallel connections (6.5/5 mW/m2). Interaction of microbes and plants studied at the interface of electrochemical and engineering aspects illustrated the feasibility of EES as a self-sustainable system with innate diverse functional aquatic biota and rhizo-microbiome to produce bioelectricity.
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