Treatment process of refractory pharmaceutical park tail water

Abstract

The invention relates to a treatment process of refractory pharmaceutical park tail water, and belongs to the field of pharmaceutical park tail water and other industrial wastewater treatment, in particular to the upgrading and rebuilding of the whole process of sewage deep treatment and secondary sewage treatment plants. Aiming at the problem that the biodegradability of the refractory industrial park tail water is poor, the method carries out pretreatment of activated sludge absorption-ozonation for the tail water firstly, and 1,000 mg / L of activated sludge is used for removing refractory organic matters in the tail water under the condition that the absorption time is 15 minutes, and increasing the biodegradability of water under the conditions that the ozone dosing quantity is 20 mg / L and the oxidation time is 30 minutes. The pretreated tail water is mixed with sanitary sewage which is subjected to sand settling and primary settling to enter a secondary biochemical treatment unit. Through pre-anoxic -anaerobic-anoxic-aerobic organic matter removal of improved A<2> / O and nitrogen and phosphorus removal treatment, the discharged water achieves the level A of national discharge standard.

Description

technical field [0001] The invention belongs to the field of treatment of tail water in a pharmaceutical park and other industrial waste water, and in particular relates to the whole process of advanced sewage treatment and the upgrade of a secondary sewage treatment plant. Background technique [0002] With the acceleration of my country's industrialization process, industrial parks such as pharmaceuticals are booming, and the resulting park tail water has caused greater pressure on the water environment. Although the tail water of the pharmaceutical park has been treated in the park, and the main indicators such as COD have reached the standard of being discharged into the urban sewage treatment plant, because it still has a large amount of refractory pollutants, it often causes great harm to the normal operation of the urban sewage treatment plant. Large interference, resulting in the inability to stably reach the standard for the discharge water. At the same time, the n...

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Problems solved by technology

[0005] Aiming at the problem of poor biodegradability and extremely difficult degradation of organic pollutants contained in the tail water of the pharmaceutical park, a set of advanced treatment process was proposed

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