Electro-biosystems with mosses on the green roofs

Abstract

The article presents the research of bioelectricity generation by electro-biosystems with mosses in containers with a soil substrate and a graphite-Zn-steel system of electrodes on green roofs during the autumn-winter-spring period. It is revealed that the optimum conditions for the functioning of electro-biosystems is the temperature above +10°С with simultaneous regular humidification of the soil. In these conditions, an average current of 19.50 mA was recorded. Electro-biosystems react by lowering in the level of produced bioelectric potential and current strength at temperature drops below 10°C, and in particular at frosts, and also, in the long absence of atmospheric precipitation. Electro-biosystems with mosses to varying degrees survived the winter period: in a significant part of them, connections between the electrodes was damaged due to the effect of frozen water or/and freezing of plants. The most optimal configuration of the electrode system for generating bioelectricity, which functions at the initial level after winter time, is established. Thermo-insulated electro-biosystems with mosses under the conditions of regular humidification have prospects of their use on green roofs of buildings after general increase of the generated bioelectric potential and current strength.

State of the Art and Environmental Aspects of Plant Microbial Fuel Cells’ Application

“…It should be noted that the countries with warm climates and high solar insolation, as well as "green roofs" cities, have the greatest potential for the PMFC technology's implementation to reduce the concentration of carbon dioxide in the air [92].…”

Effect of Plants Morphological Parameters on Plant-Microbial Fuel Cell Efficiency

“…The study of plant-based bioelectrical systems was started in 2008 in rice fields with Oryza sativa plants and with marsh grass Glyceria maxima [1][2][3] and continued both on green roofs [4][5][6] and in situ [7][8][9], as well as in laboratory conditions [10][11][12]. Plant-microbial fuel cells (PMFC) considers as an innovative ecological way of obtaining bioelectricity by introducing electrode systems into the substrate of plant growth and collecting bioelectricity produced by microorganisms in the rhyzosherical zone.…”