High-concentration pharmaceutical wastewater treatment method

Abstract

The invention discloses a high-concentration pharmaceutical wastewater treatment method. The method comprises the following steps: step 1, filtering by a grid; step 2, carrying out acid precipitationand flocculation; step 3, carrying out iron-carbon micro-electrolysis electro-Fenton combined treatment; step 4, carrying out enrichment and photocatalytic degradation; and step 5, carrying out nanofiltration and electro-adsorption desalination. According to the method, impurities and large suspended solids are removed through the grid, then sulfuric acid is adopted for acid precipitation to achieve a good COD removal effect, then iron-carbon micro-electrolysis electro-Fenton combined treatment is adopted for achieving the effects of removing nitrogen and phosphorus and reducing the chromaticity and COD of the wastewater, and the method is environmentally friendly and free of secondary pollution. The enrichment and photocatalytic degradation section can synchronously realize enrichment andphotocatalytic degradation of pollutants in a water body, residual trace organic pollutants and part of inorganic salt in the water are removed through filtration of the nanofiltration membrane filter, the water quality is improved, the treatment efficiency is greatly improved, and finally, an electro-adsorption system is adopted for desalination, so that the treatment cost is reduced. The effluent quality meets the pharmaceutical industry water pollutant discharge standard.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a pharmaceutical wastewater treatment method. Background technique [0002] Pharmaceutical wastewater has complex components, many types of organic matter, large fluctuations in water quality, COD and BOD 5 The ratio is low, the color is deep, the toxicity is high, and the concentration of suspended solids is high. It is difficult to meet the current discharge standards by traditional physicochemical and biochemical methods. Therefore, it is of great significance to find an efficient, non-secondary pollution, and flexible process for pharmaceutical wastewater treatment. Contents of the invention [0003] Aiming at the shortcomings of the existing high-concentration pharmaceutical wastewater treatment methods, the invention provides a high-concentration pharmaceutical wastewater treatment method with simple process, high pollutant removal rate and no secondary ...

AI Technical Summary

Problems solved by technology

[0002] Pharmaceutical wastewater has complex components, many types of organic matter, large fluctuations in water quality, COD and BOD 5 The ratio is low, the color is deep, the toxicity is high, and the concentration of suspended solids is high. It is difficult to meet the current discharge standards by traditional physicochemical and biochemical methods.

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