Advanced treatment process for antibiotic wastewater

Abstract

The invention relates to a process for advanced treatment of antibiotic waste water. The process is used for further treating the waste water obtained after secondary sedimentation tank treatment during the treatment of the antibiotic waste water, and comprises the following steps: firstly, performing ultrafiltration treatment on the waste water, which is obtained after the secondary sedimentation tank treatment, in an ultrafiltration apparatus so as to filter out macromolecular particulate matters in the waste water, thereby obtaining a concentrated solution and a filtrate; and then, performing degradation treatment on the concentrated solution in an aerobic biological treatment system, delivering the concentrated solution after the degradation treatment in the aerobic biological treatment system into a secondary sedimentation tank, and treating the filtrate by a series of treatment steps of regulation, air flotation, sand filtration, catalytic oxidation, sterilization and detection to obtain recycled water which accords with a recycled water standard. The process provided by the invention combines a chemical treatment method, a physical treatment method and a membrane treatment method together, and has the advantages of short process route, good treatment effect, small produced sludge amount, low system energy consumption, low equipment operating cost, simple operation and small labor intensity.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to an antibiotic wastewater advanced treatment process. Background technique [0002] There are 5,926 pharmaceutical companies in my country, and it is the largest producer and exporter of chemical raw materials in the world. Among them, the sales of antibiotics rank first in the domestic pharmaceutical market. At present, most antibiotics are produced by fermentation. A large amount of high-concentration, high-color, and refractory wastewater will be discharged. Pollutants in this type of wastewater mainly include fermentation metabolites, residual defoamers, coagulants, demulsifiers, antibiotics and their degradation products, solvents, and acids. , alkaline organic solvents and other chemical raw materials, etc., antibiotic wastewater mainly has the following basic characteristics: the composition of wastewater is complex; there are many fermentation residues, resultin...

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Problems solved by technology

[0002] There are 5,926 pharmaceutical companies in my country, and it is the largest producer and exporter of chemical raw materials in the world. Among them, the sales of antibiotics rank first in the domestic pharmaceutical market. At present, most antibiotics are produced by fermentation. A large amount of high-concentration, high-color, and refractory wastewater will be discharged. Pollutants in this type of wastewater mainly include fermentation metabolites, residual defoamers, coagulants, demulsifiers, antibiotics and their degradation products, solvents, and acids. , alkaline organic solvents and other chemical raw materials, etc., antibiotic wastewater mainly has the following basic characteristics: the composition of wastewater is complex; there are many fermentation residues, resulting in high COD of wastewater; it has a strong inhibitory effect on microorganisms and poor comprehensive biodegradability ; The PH value fluctuates greatly; the water quality and water quantity fluctuate greatly, etc.

[0003] The development of antibiotic wastewater treatment technology has gone through a long process. Common treatment methods for antibiotic wastewater at home and abroad include: physical and chemical methods (coagulation method, adsorption method, photodegradation method, electrolysis method, membrane separation method), biochemical method (good Oxygen biological treatment method, anaerobic biological treatment method, anaerobic-aerobic method, hydrolytic acidification-aerobic method, membrane bioreactor) and a combination of other processes. At present, large-scale industrial treatment methods are based on biological methods Mainly, supplemented by the method of adding flocculants, although the treatment effect of wastewater has been greatly improved, but the problem of degradation of a large number of refractory biochemical substances in wastewater has not been solved, and the amount of sludge produced by flocculation and sedimentation is large. It is difficult for the follow-up solid waste treatment, and the effluent is still difficult to meet the discharge standard, mainly in the excess of COD, chroma, etc., so it is very necessary to carry out advanced treatment

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