Electronic industrial fluoride, ammonia and nitrogen-containing wastewater treatment method

Abstract

The present invention relates to an electronic industrial fluorine, ammonia and nitrogen-containing wastewater treatment method, which is as follows: (1), processing wastewater according to ammonia and nitrogen removal step, fluorine removal step and filtering step in turn; and (2), passing the wastewater treated by the step (1) in turn through an ultrafiltration membrane device, a cartridge filter and a reverse osmosis membrane device for processing to obtain regenerated recycle-water and concentrated water, wherein before the wastewater enters the ultrafiltration membrane device, a bactericide is added into the wastewater, after the wastewater passes through the cartridge filter and before the wastewater enters the reverse osmosis membrane device, a reducing agent is added into the wastewater to remove the bactericide in the wastewater. According to the method, addition of the reducing agent after the cartridge filter is put forward for the first time, on the one hand, no hazard is caused to the reverse osmosis membrane device, on the other hand the cartridge simplify operation and reduce cost.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a treatment method for fluorine-containing ammonia nitrogen-containing waste water in the electronic industry. Background technique [0002] With the development of electronic industry technology, especially integrated circuit chip industry technology, the treatment of electronic industrial wastewater, especially electronic industry wastewater containing fluorine and ammonia nitrogen, has become a prominent problem in the water treatment industry. The electronics industry usually uses a large number of chemicals such as hydrofluoric acid, sulfuric acid, phosphoric acid, ammonia water, hydrochloric acid, and organic solvents in the production process, making the discharged wastewater contain a large number of components that pollute the surrounding environment, which has aggravated my country's water pollution. and the severity of the water shortage situat...

AI Technical Summary

Problems solved by technology

[0006] ① The security filter installed between the ultrafiltration membrane device and the reverse osmosis device is frequently blocked and needs to be replaced frequently, which causes inconvenience to production and increases the cost of wastewater treatment;

[0007] ② The cleaning effect of the reverse osmosis membrane device is not good, and the service life of the reverse osmosis membrane is short

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