An iron /
carbon nanotube component capable of treating
wastewater comprises a central tube with a plurality of pores on the tube wall, wherein the central tube arranged into the inner cavity of an outer sleeve is coated with an
electrode material layer on the outer wall thereof, having the inner cavity thereof communicated with a water inlet port, and provided at the central position thereof with an
anode tube connected with an external power supply; and the upper and the lower ends of the outer sleeve are sealed and respectively provided thereon with a water outer port and a
wastewater drainage port. The invention also provides a magnetoelectric oxidation
biological filter tank containing the above iron /
carbon nanotube component and integrating
catalytic oxidation / reduction reaction and
precipitation, biological
phosphorus and
nitrogen removal,
filtration and
sludge discharging, comprising a tank body and a total water inlet tube and a total water outlet tube arranged on the tank body, wherein a tank body bracket and an iron /
carbon nanotube supporting frame are arranged inside the inner cavity of the tank body, iron / carbon
nanotube components arranged in rows are arranged on the tank body bracket, and a water distribution tube communicating with the total water input tube is arranged on the iron / carbon
nanotube supporting frame; and an
aeration plate and a filtering filler are arranged among iron / carbon
nanotube components. The inventive iron / carbon nanotube component can be used for treating
electroplating wastewater, concentrated fluid generated from
nanofiltration membrane or RO membrane,
dyeing wastewater, pharmaceutical wastewater and other wastewater that is difficultly treated by using biological method, and the
operating cost and floor space are half of those in conventional process, so that the inventive iron / carbon nanotube component has wide application prospect.