Marine domestic sewage treatment unit

The utility model relates to a marine domestic sewage treatment unit, this sewage treatment plant comprises four modules, and first module is including collecting the pond of hydrolysising, and the sewage inflow is collected the pond of hydrolysising and is carried out hydrolytic acidification and oxygen deficiency denitrogenation processing, the second module includes the two -stage biological fluidized bed, and sewage gets into two -stage biological fluidized bed aerobic treatment, carries out the catalytic oxidation reaction, the third module includes the sedimentation tank, and sewage gets into the sedimentation tank and deposits, the fourth module includes MBR membrane bioreactor, and the supernatant after the sediment flows into MBR membrane bioreactor, eliminates the organic matter that the two -stage biological fluidized bed does not decompose totally and the macromolecule organic matter of difficult degradation. The utility model is used for handle the ship sewer soil that goes to toilet, use water a