The invention discloses an
air cathode microbial fuel cell constructed wetland device of a biological
carbon matrix anode. The upper layer of the
constructed wetland is an aerobic zone, the lower layer of the
constructed wetland is an anoxic zone; the aerobic zone and the anoxic zone are respectively provided with a
cathode electrode and a biological
carbon matrix anode electrode; waste water enters the anoxic zone through a
water supply system and an inflowing water distribution
pipe; electrons and protons are generated by oxidizing organic matters by microorganisms; the electrons are transmitted to the
cathode electrode of the upper aerobic zone by the biological
carbon matrix anode electrode of the lower anoxic zone through an
external circuit; the protons are transmitted to the aerobic zone through a packing medium; the protons are diffused to the aerobic zone through a solution to combine with the electrons and
oxygen gas so as to generate water; finally, after being cleaned by the microorganisms in the upper aerobic zone, the waste water flows to a water drainage
system through an outflow water collecting
pipe. The constructed
wetland device disclosed by the invention can efficiently remove organic matters, increase the generated power, and effectively improve
water quality and pH value. The constructed
wetland is various in organisms, good in
processing effect, low in running and maintaining costs, energy saving and environment friendly.