EFFECT OF CATHODIC PLATINUM LOADING ON SYSTEM PERFORMANCE IN A MICROBIAL DESALINATION CELL SYSTEM
(2015) NTPC GETS — Location: New Delhi, India
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- Abstract
- Increasing world population coupled with rapid industrialization and urbanization has led to an increase in global water requirements. Fresh water sources are limited as such there is a call for water recycling and reuse. Most technologies for wastewater treatment and saline water desalination are highly energy intensive and produce sludge that needs secondary treatment. Microbial Desalination Cells (MDCs) are exciting innovation in field of Membrane Bioreactor Technology that promise the dual benefit of wastewater treatment and saline water desalination in tandem, along with producing trace power output. This decreases the need for external power since the energy stored in the organic wastewater is used to run the cycle. MDC research is currently in an early phase as such various factors affecting performance are still under scientific investigation. A simplistic MDC circuit could be interpreted as two resistances connected in series: applied external load and intrinsic resistance arising from kinetic and mass transfer effect. The maximum power generated thus depends on the internal resistance which is a compounded result of various static and dynamic factors like strength of wastewater, number of ion-exchange membrane pairs, inter-membrane distance, cathodic loading, saline concentration, etc. This work focuses on understanding the effect of cathodic platinum loading on overall system performance. A three chamber MDC system was designed with assorted wastewater inoculum at the anodic side, maintaining salinity similar to seawater in the middle chamber. Platinum loading of 0.1 and 1.0 mg/cm2 of cathode area was used and the system performance was analyzed through electrochemical techniques. With gradual increase in internal resistance, drop in peak power was observed for individual loading over the duration of the system run. A direct correlation was observed for increase in power output and decrease in internal resistance of the system on increasing the platinum loading from 0.1 to 1.0 mg/cm2.
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Maskarenj, M., Goenka, R., & Ghosh, P. C. (2015). EFFECT OF CATHODIC PLATINUM LOADING ON SYSTEM PERFORMANCE IN A MICROBIAL DESALINATION CELL SYSTEM. NTPC GETS, New Delhi, India. https://hdl.handle.net/2078.5/225509