Multistep biological slime contact process by natural aeration

摘要

The present invention is a method for treating wastewater by biological treatment of a multi-stage biofilm contact tank with natural abandonment, in order to improve the shortcomings of existing treatment methods and make the most of the advantages. It was withdrawn for the purpose.;The present invention was configured as follows to achieve the above object. The influent is diluted by the circulating water so that it is evenly sprayed from the nozzle into the multistage biofilm contact bath. The waste water so sprayed is then passed through a multi-stage biofilm contact tank, where oxygen is supplied to the atmosphere by a drop and splashed or flows through the biofilm of the ciliated contact material. After the treatment, the first treatment water is collected and put into the upper part of the sedimentation tank by the structure that can collect the treatment water, and the input treatment water is moved to the nozzle by the circulation pump and then passes through the multi-stage biofilm contact tank above. . Treated water through this cycle is settled in the sedimentation tank so that the supernatant is discharged and the sediment sludge is discharged to the outside for treatment.;The present invention has the following effects. First of all, the land area can be reduced, power costs can be reduced, and higher processing efficiency can be obtained.