Treatment method based on oily industrial wastewater

Abstract

The invention discloses a treatment method based on oily industrial wastewater. The method comprises the following steps: removing oil in a natural settling manner, aggregating and collecting oil molecules participating in the oil in an electro-adsorption manner to obtain floating oil, and then separating out waste liquid to be treated; adding the waste liquid to be treated into a liquid storage tank, and meanwhile, adding a treatment agent into the liquid storage tank to prepare for the next step of electric flocculation treatment; applying the low-voltage pulse current to the electrode plate to perform electric flocculation treatment on the wastewater, and enabling the electrode plate to decompose water into water in the electrolysis process and decompose residual pollutants by hydroxyl with oxidizing property; carrying out solid-liquid separation on the electrolyzed wastewater through an ultrafiltration membrane, and carrying out solid-liquid separation on solid pollutants in the wastewater; and after ultrafiltration, enabling the produced water to enter a reverse osmosis membrane, and carrying out deep filtration to further remove residual pollutants after electrolysis. A natural sedimentation mode is adopted firstly, and then an electric adsorption mode is adopted, so that subsequent deep treatment is facilitated, waste oil in the waste liquid is removed to the greatest extent, and the pollution degree of the waste water is reduced.

Description

technical field [0001] The invention relates to the field of industrial wastewater treatment, in particular to a treatment method based on oily industrial wastewater. Background technique [0002] Pure water changes its original physical or chemical properties after use, and becomes wastewater containing different types of impurities. Chemical wastewater is the process wastewater, cooling water, exhaust gas washing water, equipment and site washing water and other wastewater discharged in chemical production. If the waste water is discharged without treatment, it will cause different properties and different degrees of pollution of the water body, thereby endangering human health and affecting industrial and agricultural production. Chemical industry includes organic chemical industry and inorganic chemical industry. There are various chemical products with complex components. The wastewater discharged from chemical plants is called chemical wastewater. There are many kind...

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Problems solved by technology

[0005] At present, although the single biological aerated filter process has a good ability to degrade organic matter and ammonia nitrogen, its effect on the removal of refractory organic matter in wastewater is not ideal, and it is difficult to achieve standard discharge of wastewater. On the other hand, membrane The separation technology has a good treatment effect and can meet the discharge standards. However, due to the rational arrangement of the treatment process, when the concentration of pollutants in the wastewater is too high and diverse, the cleaning cycle of the membrane will be shortened, thereby shortening the use of the membrane. The service life increases the operating cost, and the filtering effect also decreases

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