International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

Plant sediment microbial fuel cells (PSMFC) transform solar energy in an environmentally friendly and efficient way. Their integration in constructed wetlands allows the generation of electricity in parallel wastewater treatment. The work of plant sediment microbial fuel cells is influenced by a number of factors, such as environmental conditions, vegetation type, hydraulic retention time, water flow, the presence of heavy metals and other contaminants in the treated water and others. The purpose of this study is to establish the seasonal dynamics of the effectiveness of PSMFC in Moderate continental climate zone. Seasonal changes in environmental conditions have a significant impact on the generation of energy from the PSMFC in regions with moderate continental climate. With the best electrical parameters the cell is characterized in spring and summer. They are significantly lower in autumn and winter. The effectiveness of PSMFC, both as a treatment facility and as electricity generation is directly related to the vegetation period of the planted vegetation and the effectiveness of the photosynthesis, which are a function of the intensity of the light, the duration of the sunshine and the average daily temperatures.

Most applications of constructed wetlands (CW) have been designed to treat municipal or domestic wastewater but at present, constructed wetlands are successfully applied to many types of wastewater. The criteria for CW design and operation include site selection, plant selection, substrate selection, wastewater type, plant material selection, hydraulic loading rate, hydraulic retention time, water depth, operation mode and maintenance procedures. Integration of plant sediment microbial fuel cells (PSMFC) into them allows water treatment and parallel energy production. The purpose of this study is to investigate the influence of design of PSMFCs and various operation modes on electrical parameters and water treatment effect from petroleum products. The best results were achieved with downstream water flow, substrate – mixture of sediment and peat in a ratio of 3:1, use of stainless steel electrodes and the absence of a separator between aerobic and anaerobic areas. With this design and operating mode was achieved maximum power density of 10,40 mW/m2 and water purification of petroleum products of over 99% in CW with integrated PSMFC