GUAN Lin,TAO Meng-ni,JING Zhao-qian.Enhanced Nitrogen Removal and Electricity Generation Efficiency of Constructed Wetland-Microbial Fuel Cells for Purification of Tail Water from Wastewater Treatment Plant[J].China Water & Wastewater,2021,37(13 13):7-13.
Enhanced Nitrogen Removal and Electricity Generation Efficiency of Constructed Wetland-Microbial Fuel Cells for Purification of Tail Water from Wastewater Treatment Plant
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
13 13
Page:
7-13
Column:
Date of publication:
2021-07-01
- Keywords:
- constructed wetland; microbial fuel cell; tail water; nitrogen removal; electricity generation
- Abstract:
- The tail water from wastewater treatment plant was treated by constructed wetland-microbial fuel cells (CW-MFCs) to enhance nitrogen removal and electricity generation. Ammonia nitrogen (reactor Ⅰ) or nitrate nitrogen (reactor Ⅱ) was applied as a single nitrogen resource, and COD and ammonia nitrogen/nitrate nitrogen removal efficiency and output voltage of the two reactors were investigated. The COD removal efficiency of reactor Ⅰwas higher than that of reactor Ⅱ, which was up to 78.81%. The ammonia nitrogen and nitrate nitrogen removal efficiencies increased steadily in the two reactors. In addition, the output voltage and maximum power density of reactor Ⅰ were 126 mV and 6.01 mW/m3, respectively, which were higher than those of reactor Ⅱ (58 mV and 1.12 mW/m3). The distribution of DO, COD and nitrogen concentrations showed that DO gradient in reactor Ⅰwas higher than that in reactor Ⅱ, COD was mainly removed in anode region, and nitrification and denitrification mainly occurred in cathode region and anode region, respectively.
Last Update:
2021-07-01