Topic: Advances in wastewater treatment by combined microbial fuel cell-membrane bioreactor (MFC-MBR) Sreemoyee Ghosh Ray Gourav Dhar Bhowmick Prof. Makarand M. Ghangrekar Prof. Arunabha Mitra 13 th IWA Specialized Conference on Small Water and Wastewater Systems 5 th IWA Specialized Conference on Resources-Oriented Sanitation
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Topic: Advances in wastewater treatment by combined
microbial fuel cell-membrane bioreactor (MFC-MBR)
Sreemoyee Ghosh Ray
Gourav Dhar Bhowmick
Prof. Makarand M. Ghangrekar
Prof. Arunabha Mitra
13th IWA Specialized Conference
on Small Water and Wastewater
Systems
5th IWA Specialized Conference
on Resources-Oriented Sanitation
Commonly Used Aerobic Biological Wastewater Treatment Processes
• Aerobic respiration pathway
• Bio-oxidation
• Nitrification
Wastewater
BODNH4
O2
Attached growth process
CO2
NO3
Oxygen transfer limitation
Suspended growth process
Better treatment
efficiency
2
Membrane bioreactor (MBR) Technology
Biological – ASP + Membrane Filtration
1969 - 1970 1970 - 1980 1980-1990
First report
MBR installation
for industrial
wastewater
treatment
Submerged – MBR
with flat-sheet UF
plate & frame
membrane
Connecticut, US
20152005 2010
Global MBR Market
$ 217 Million
$ 360 Million
$ 627 Million
New York and
Connecticut, US
Smith et al., 1969Hardt et al., 1970
Dorr-Oliver, Inc.
Japan
Yamamoto et al., 1989
Development of Integrated Processes• AOP• Reverse and forward osmosis• Hybrid MBBR-MBR• MBR – ozonation or UV/H2O2
3
(0.2-0.5 KWh/m3)
MBR technology involves high energy-consuming process
Energy consumption of MBR can be lowered by integrating it with
Microbial Fuel Cell (MFC) technology
R
H+
H+
½ O2 + 2H+ + 2e-
H2O
8e- 8e-
CH3COO -
+ 4H2O
2HCO3-
+ 9H +
Anode Cathode
(E0ox= - 0.187 V)
(E0red= 0.805 V)
CEM
Microbial Fuel Cell (MFC)
Conversion of bio-chemical
energy to electrical energy
Bio-electricity – An Alternative
and Clean Energy
• How much electrical energy can be
generated?
• Can we provide an efficient treatment?
• Can low-cost sustainable development of
MFC-MBR technology be achieved?
4
Recent advances in MFC-MBR processes
Completely
anaerobic process
• Electrochemical – MBR
• Up-flow integrated air-cathode
MFC-MBR
Wang, 2013 – Sci. Rep.Ge, 2013 – J. Chem. Technol. Biotechnol.Wang, 2012 – Appl. Energy