Othman, Rashidi and Ismail, Muhammad Hanafi and Wan Sulaiman, Wan Syibrah Hanisah (2026) Bio-hybrid urban infrastructure: synergizing microalgal electrochemical cells and photovoltaics in landscape architecture. In: EL RUHA 15th INTERNATIONAL CONFERENCE ON SCIENTIFIC RESEARCH, 18-19 AUGUST 2026, SANLIURFA-TURKIYE.
|
PDF
- Published Version
Download (2MB) | Preview |
Abstract
The global built environment faces increasing pressure to adopt renewable energy solutions that overcome the intermittency of conventional systems such as photovoltaics. Photovoltaic (PV) canopies, while effective for solar electricity generation and shading in outdoor spaces, are limited by diurnal and seasonal irradiance constraints. This study explores the integration of algal bioelectric systems with PV canopy structures as a hybrid renewable energy approach for built environments. The objective was to evaluate the bioelectric potential of three algal species specifically Alkalinema sp., Phormidium sp., and Chlorella vulgaris using carbon and nickel electrodes, and to discuss the feasibility of incorporating such bio-electrochemical units within PV canopy installations. Algal cultures were maintained in BG11 medium for four weeks, after which centrifuged biomass served as the positive electrolyte and fresh BG11 medium as the negative control. Half-cells were assembled with carbon and nickel electrodes and connected to a Battery Testing System for continuous 24-hour voltage recording. Results indicated that Chlorella vulgaris generated the highest voltage with carbon electrodes (200 mV), followed by Alkalinema sp. (100 mV) and Phormidium sp. (50 mV). With nickel electrodes, cyanobacterial species outperformed Chlorella vulgaris, producing 125 mV (Alkalinema sp.) and 80 mV (Phormidium sp.) compared to only 10 mV. Carbon-based cells demonstrated relatively stable voltage over 24 hours, suggesting suitability for continuous low-power applications. These findings support the feasibility of algal bioelectric units as complementary energy sources within PV canopy structures, providing trickle-charge capacity during overcast conditions or nighttime. From a landscape architecture perspective, algal cultivation modules can be integrated into structural columns, planters, or water systems of canopies, combining renewable energy generation with carbon sequestration and aesthetic benefits, particularly in tropical climates.
Actions (login required)
 |
View Item |