TY - JOUR
T1 - Performance of pilot-scale horizontal subsurface flow constructed wetland coupled with a microbial fuel cell for treating wastewater
AU - Srivastava, Pratiksha
AU - Abbassi, Rouzbeh
AU - Garaniya, Vikram
AU - Lewis , Trevor
AU - Kumar Yadav, Asheesh
PY - 2020/2
Y1 - 2020/2
N2 - This work presents a new hybrid technology for treating wastewater along with electricity generation. The main objective of this work was to integrate a microbial fuel cell (MFC) into a horizontal subsurface constructed wetland (HSSF-CW-MFC) at a pilot scale for improving the wastewater treatment performance of HSSF-CW. The HSSF-CW-MFC was tested on three different organic loading rates: 0.15, 0.30, and 0.52 kg COD/m3/d at a set hydraulic retention time. The HSSF-CW-MFC was further studied for establishing the influence of electron transfer using conductive material (artificial electron acceptor) on wastewater treatment performance. During the efficient electron transfer (system run in closed-circuit operation), 33.7% higher chemical oxygen demand (COD) removal was achieved in comparison to the hindered electron transfer (system run in open circuit) condition. The results illustrate that efficient electron transfer from bottom anaerobic zones to the aerobic zone of the HSSF-CW helps in enhancing the treatment performance. The maximum power and current densities achieved were 11.67 mW/m3and 17.15 mA/m3, respectively.
AB - This work presents a new hybrid technology for treating wastewater along with electricity generation. The main objective of this work was to integrate a microbial fuel cell (MFC) into a horizontal subsurface constructed wetland (HSSF-CW-MFC) at a pilot scale for improving the wastewater treatment performance of HSSF-CW. The HSSF-CW-MFC was tested on three different organic loading rates: 0.15, 0.30, and 0.52 kg COD/m3/d at a set hydraulic retention time. The HSSF-CW-MFC was further studied for establishing the influence of electron transfer using conductive material (artificial electron acceptor) on wastewater treatment performance. During the efficient electron transfer (system run in closed-circuit operation), 33.7% higher chemical oxygen demand (COD) removal was achieved in comparison to the hindered electron transfer (system run in open circuit) condition. The results illustrate that efficient electron transfer from bottom anaerobic zones to the aerobic zone of the HSSF-CW helps in enhancing the treatment performance. The maximum power and current densities achieved were 11.67 mW/m3and 17.15 mA/m3, respectively.
KW - Constructed wetland
KW - Microbial fuel cell
KW - Constructed wetland-microbial fuel cell
KW - Open circuit
KW - Closed circuit
UR - http://www.scopus.com/inward/record.url?scp=85074010658&partnerID=8YFLogxK
U2 - 10.1016/j.jwpe.2019.100994
DO - 10.1016/j.jwpe.2019.100994
M3 - Article
VL - 33
SP - 1
EP - 7
JO - Journal of Water Process Engineering
JF - Journal of Water Process Engineering
SN - 2214-7144
M1 - 100994
ER -