A kind of treatment method of cephalosporin antibiotic production wastewater

Abstract

The invention discloses a method for treating waste water produced by cephalosporin antibiotics, which belongs to the field of waste water treatment. The present invention adopts the method of combining electrodialysis-MVR evaporation crystallization-A / O biochemical treatment, and controls the salt content of concentrated concentrated water and biochemical fresh water by adjusting the conductivity of the electrodialysis process, so that the salt and water in the raw water The dialysis device is fully separated, which improves the evaporation and crystallization efficiency of MVR, reduces the harm to microorganisms in the biochemical system, and improves the removal rate of organic matter and ammonia nitrogen. The pH of the concentrated concentrated water is kept at 6~8.5 to avoid the continuous enrichment of hydrogen ions in the MVR system and affect the boiling point temperature rise of ammonium sulfate and other salts, so that the MVR can continue to produce salt and prolong the stable operation time of the system.

Description

technical field [0001] The invention discloses a method for treating waste water produced by cephalosporin antibiotics, which belongs to the field of waste water treatment. Background technique [0002] Cephalosporin antibiotic production wastewater is a kind of organic pharmaceutical wastewater with complex components and high content, which contains lipids, alcohols, fermentation metabolites, mycelia and antibiotic residues and other refractory substances, and the wastewater also contains a large amount of sulfuric acid Ammonium, which increases the difficulty of its handling. [0003] At present, the methods to treat this kind of wastewater mainly include flocculation precipitation method, iron-carbon internal electrolysis method, advanced oxidation method, membrane separation technology and biological method. The above treatment methods have their own limitations. Synthesis of high-efficiency flocculants is still the current development direction; in the iron-carbon int...

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Problems solved by technology

[0002] Cephalosporin antibiotic production wastewater is a kind of organic pharmaceutical wastewater with complex components and high content, which contains lipids, alcohols, fermentation metabolites, mycelia and antibiotic residues and other refractory substances, and the wastewater also contains a large amount of sulfuric acid Ammonium, which makes it difficult to handle

[0003] At present, the methods to treat this kind of wastewater mainly include flocculation precipitation method, iron-carbon internal electrolysis method, advanced oxidation method, membrane separation technology and biological method. The above treatment methods have their own limitations. Synthesis of high-efficiency flocculants is still the current development direction; in the iron-carbon internal electrolysis method, the iron-carbon filler is prone to compaction, and the electrolysis efficiency is reduced; in the advanced oxidation method, the amount of oxidant required is large, the operating cost is high, and the economy is the whole project. Bottleneck, and produce chemical sludge; membrane separation technology is only used to remove residual antibiotic organic matter, membrane pollution control is difficult in the project, and the cleaning effect is not good; biological method: as a guarantee for the follow-up wastewater to meet the standard discharge, it must be pretreated to remove the residual antibiotics and high salt

In view of the limitations of the above methods, the combined process of concentration + evaporation crystallization + biochemical treatment is also a popular treatment method for high-salt wastewater. However, for pharmaceutical wastewater with complex components and high COD and ammonia nitrogen content, the treatment system is prone to serious damage. In addition, during the evaporation and crystallization process, due to the large temperature rise of the boiling point, the crystallization efficiency is reduced, which makes the continuous operation time of the system short, unstable or even unable to operate normally, and the treatment effect of organic matter and ammonia nitrogen is not good.

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