Second grade sewage treatment plant

The utility model relates to a sewage treatment plant, ultrasonic wave scrubbing pond around chemical scrubbing pond and chemical scrubbing pond, the scrubbing pond be provided with the filth exhaust port, install agitating unit in the scrubbing pond, agitating unit include driving motor, the rotation axis be connected with the driving motor output, the upside stirring vane who installs on rotation axis upper portion and install the downside (mixing) shaft blade in the rotation axis lower part, it accepts the board to set up the filth in upside stirring vane's top, set up the scraper blade in the top that the board was accepted to the filth, the upper surface that the board was accepted to the scraper and the filth of scraper blade pastes mutually, upside stirring vane's tip is located filth exhaust port department, scraper blade and scrubbing pond between have a clearance, the scraper blade is accepted the board from the filth and is struck off that the filth that gets off is final behind this clearance discharges from the filth exhaust port. The utility model provides a polymer organic pollutant in the water is got rid of to convenient and practical method, use ultrasonic wave technique can not cause secondary pollution to the environment.