A method for enhanced treatment of high-concentration ciprofloxacin wastewater by bioelectrochemical anaerobic/micro-electrolytic blending coupling

Abstract

The invention relates to a method of conducting enhanced treatment on high concentration ciprofloxacin wastewater through bioelectrochemistry anaerobic / microelectrolysis blending coupling. The method comprises the steps of inoculating activated anaerobic sludge and activated aerobic sludge, after inoculating and biofilm formation, performing anaerobic biological-microelectrolysis treatment on the ciprofloxacin wastewater in a mixed material with fly ash ceramsite being a carrier and iron aluminum carbon ternary microelectrolysis ceramsite being a filler, and externally adding direct voltage during the treatment; performing aerobic treatment on obtained coupling treatment wastewater with sludge ceramsite being a filler and on the condition that the direct voltage is externally added, and obtaining clear discharge water after the treatment. According to the method of conducting the enhanced treatment on the high concentration ciprofloxacin wastewater through the bioelectrochemistry anaerobic / microelectrolysis blending coupling, a bioelectrochemistry system and a microelectrolysis system are integrated, pollutants in the wastewater are removed by externally adding the direct voltage, the starting time of a coupling system is short, and the operation and running are simple; high concentration ciprofloxacin can be efficiently degraded, meanwhile COD, TN and TP can be efficiently removed, a large amount of black mud will not be produced in the discharge water after the treatment, the discharge water is clear, secondary pollution will not be caused, and the treatment efficiency is high.

Description

technical field [0001] The invention relates to a method for enhanced treatment of high-concentration ciprofloxacin wastewater by bioelectrochemical anaerobic / micro-electrolysis blending coupling, which belongs to the technical field of wastewater treatment. Background technique [0002] Ciprofloxacin belongs to the third-generation quinolone antibiotics. Because of its good antibacterial and bactericidal effects, wide antibacterial spectrum, and low price, it is widely used in clinical, animal husbandry and aquaculture industries, and has become the most widely used quinolone drug. The widest variety. Ciprofloxacin pharmaceutical wastewater is a high-concentration refractory organic wastewater with a COD of over 10,000 mg / L and a nitrogen content of 1,000 mg / L, and the wastewater usually contains a relatively high concentration of ciprofloxacin, as well as those produced during the production process. Some of the intermediate products, such as toluene, amides, cyclopropane...

AI Technical Summary

Problems solved by technology

During the long-term operation, it was found that iron-carbon ceramsite pretreatment effluent will produce a large amount of black mud after adjusting the pH, which is not only difficult to handle, causing secondary pollution, but also leads to turbidity of the effluent, which has an adverse effect on subsequent biological treatment; iron-carbon ceramsite Made of iron powder and carbon powder, which increases the processing cost and is easy to generate waste

At the same time, in the long-term operation, it was also found that the anaerobic / aerobic combined biological filter was unstable in operation, poor in shock load resistance, sensitive to changes in the external environment and operating conditions, and had limited ability to remove high-concentration COD. This may be due to the anaerobic / aerobic Microbial treatment in a reactor, on the one hand, the filling height is not enough, resulting in unsatisfactory treatment effect, on the other hand, it is easy to interact with each other, which is not conducive to the stability of their respective biological communities

Images