NOVELTY - A sewage flow circulating bacterial membrane reactor comprises reaction column and reflux liquid circulating heating system. The reaction column comprises liquid inlet section (4), aerator (5), water distribution plate (6), water distribution zone (7), ecological supporting plate (8), ecological filler area (9), ecological suspension plate (10), ceramic supporting plate (12), ceramic particle filler area (13), rectification plate (14), plastic grid (15), and clean water separating area (16) arranged within a shell (31).    USE - Sewage flow circulating bacterial membrane reactor used for processing a liter of heavy metals (claimed).    ADVANTAGE - The reactor is suitable for removing Cd2+, Ni2+ and other heavy metal ions in the sewage; has simple reaction conditions, small investment, and low cost.    DETAILED DESCRIPTION - A sewage flow circulating bacterial membrane reactor comprises reaction column and reflux liquid circulating heating system. The reaction column comprises liquid inlet section, aerator, water distribution plate, water distribution zone, ecological supporting plate, ecological filler area, ecological suspension plate, ceramic supporting plate, ceramic particle filler area, rectification plate, plastic grid, and clean water separating area arranged within a shell. A microbial strain is provided in the ceramic particle filler area (13) and in the cavity between water distribution zone and ecological base supporting plate. A temperature controller (11) is provided in cavity filler area between suspension plate and ceramic supporting plate. A liquid inlet (32) is provided on left sidewall of liquid inlet section. A reactor vent (22) is provided on right sidewall of liquid inlet section. A liquid outlet (17) and an overflow port (18) are provided in the clean water separating area from bottom to top. An inlet water tank (1) is connected with the water outlet of liquid preheater (2). The liquid preheater is connected with the liquid inlet through a pump (3). The reflux liquid circulating heating system comprises a circulating outlet (19) located on right sidewall of shell between liquid outlet and overflow port, a circulating pump (21), and a circulating pipe (20) connected with the circulating outlet and circulating pump. The other end of circulating pump is connected with liquid preheater.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of bacterial membrane reactor.    Inlet water tank (1)    Liquid preheater (2)    Liquid inlet pump (3)    Liquid inlet section (4)    Aerator (5)    Water distribution plate (6)    Water distribution zone (7)    Ecological supporting plate (8)    Ecological filler area (9)    Ecological suspension plate (10)    Temperature controller (11)    Ceramic supporting plate (12)    Ceramic particle filler area (13)    Rectifying plate (14)    Plastic grid (15)    Water separation zone (16)    Liquid outlet (17)    Overflow port (18)    Circulating outlet (19)    Circulating pipe (20)    Circulating pump (21)    Reactor vent (22)    Shell (31)    Liquid inlet (32)