The invention discloses a micro-nano catering waste water pretreatment process. The micro-nano catering waste water pretreatment process comprises the following steps: gathering kitchen catering
wastewater to automatically flow into an
impurity separation area by virtue of gravity, and separating and removing large-particle impurities in the waste water;
settling small particles in the waste water along a 30-DEG conical hopper; when the waste water flows by the front end of an oil-water separation area, transporting
ozone generated by an
ozone generator to a micro-nano bubble generator, mixing the catering waste water and the
ozone sufficiently under the effect of the micro-nano bubble generator, then circularly
cutting, and generating micro-nano bubbles; absorbing, by the micro-nano bubbles in the waste water,
suspended solids, forming the suspended
solid cluster, and then enabling the suspended
solid cluster to float on the surface of the water to form floating
slag; and enabling the waste water to flow from the
tail end of the oil-water separation area to a reaction static
settling area, standing for 2 to 3 min, arranging a
sampling valve on a water outlet end, monitoring, by the
sampling valve, the
water quality, and discharging the water after the
water quality reaches the standard. The micro-nano catering waste water pretreatment process has the advantages of good
treatment effect, up-to-standard
water quality and the like.