A method for advanced treatment and reuse of antibiotic wastewater

Abstract

The invention discloses an antibiotic wastewater advanced treatment and reuse method. The method is characterized in that advanced treatment of biochemically treated antibiotic wastewater is carried out by adopting an active carbon filtration-pH value adjustment-nanofiltration combined process, active carbon filtration is used to further remove non-degradable organic compounds residual in biochemical discharged water and reduce the organic pollution of a nanofiltration membrane, the pH value of active carbon discharged water is adjusted to reduce the inorganic pollution of the nanofiltration membrane, residual organic matters and multivalent ions in wastewater are effectively removed by using the nanofiltration membrane, and the TOC, the COD, the chroma and the SO4<2-> removal rate of nanofiltration water are less than 1mg / L, less than 10mg / L,0PCU and more than 98% respectively. The method realizes the antibiotic wastewater treatment and reuse. The method has the advantages of simple process flow, low cost recycling of difficult-treatment antibiotic wastewater, and suitableness for the advanced treatment of the biochemically treated antibiotic wastewater.

Description

technical field [0001] The invention relates to the technical field of advanced treatment of industrial wastewater, in particular to a method for advanced treatment and reuse of antibiotic wastewater with nanofiltration membrane technology as the core. Background technique [0002] my country is the world's largest producer and exporter of chemical raw materials, among which the sales of antibiotics rank first in the domestic pharmaceutical market, with a per capita consumption of about 138 grams. Antibiotic production includes processes such as microbial fermentation, filtration, extraction and crystallization, chemical extraction, and refining. The main sources of waste water are: (1) The crystallization liquid and waste mother liquid of the extraction process are high-concentration organic waste water, and high-concentration waste water is discharged per ton of product The amount of waste mother liquor is as high as 150 ~ 850m 3 ; (2) Washing wastewater, which belongs to...

AI Technical Summary

Problems solved by technology

Therefore, antibiotic production wastewater is a kind of high-concentration organic wastewater rich in refractory organic matter and biotoxic substances, and its pollutants mainly include fermentation metabolites, residual defoamers, coagulants, demulsifiers, antibiotics and their degradation products, Solvents, as well as acid, alkali organic solvents and other chemical raw materials, etc., have complex components, have a strong inhibitory effect on microorganisms, and have poor comprehensive biodegradability

[0003] At present, the large-scale treatment of antibiotic wastewater at home and abroad is still dominated by biological methods. In order to increase the treatment effect, CASS, MBR and other processes have been developed on the basis of traditional biological methods. Although the wastewater treatment effect has been greatly improved, but Since the problem of a large amount of refractory biodegradable substances in the wastewater has not been solved, the treated effluent still cannot meet the discharge standards, mainly in the excess of COD and chroma

In addition, the residual antibiotics in the wastewater cannot be effectively removed, and the concentration level discharged into the environment is as high as mg / L. These residual antibiotics will lead to the enhancement of bacterial resistance in the environment, thereby posing a potential threat to human health

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