Fenton-like technique and reactor for treating biochemical effluent

Abstract

The invention provides a Fenton-like technique for treating biochemical effluent. According to the technique, the pH value of the biochemical effluent to be treated is controlled at 6.0-7.0, and Fenton-like reaction is performed under the combined actions of a ferrous salt solution and oxydol by using a supported nano iron oxide catalyst with the particle size of 10-40 meshes. The Fenton-like technique is especially suitable for carrying out advanced treatment on biochemical effluent in the field of coking, can obviously enhance the catalytic efficiency of the Fenton-like reaction process, avoids the side reactions, avoids generating float sludge in the treatment process, and enhances the quality of the treated effluent. Besides, the pH value of the treated effluent is 7.0-8.0, and the treated effluent can be directly discharged without regulating the pH value. Besides, the sludge generated in the reaction process can be subjected to waste utilization for paint production. The invention also provides a reactor for implementing the Fenton-like technique. The reactor is more beneficial to enhancing the wastewater treatment effect.

Description

technical field [0001] The invention relates to the technical field of Fenton-like treatment, in particular to a Fenton-like process for treating biochemical effluent, and at the same time, the invention also relates to a reactor for treating biochemical effluent. Background technique [0002] Due to the different pollutants and pollution levels of industrial wastewater, the biodegradability of industrial wastewater varies greatly. At present, most industrial wastewater is difficult to meet the discharge standard after biochemical treatment. It is necessary to add advanced treatment units for reprocessing to achieve discharge. Standard, advanced wastewater treatment technologies that have been developed include ozone oxidation, activated carbon adsorption, membrane separation, wet oxidation, and Fenton oxidation, among which Fenton oxidation (H 2 o 2 / Fe 2+ ) is considered to be an effective, simple and economical treatment method, while other methods are difficult to be a...

AI Technical Summary

Problems solved by technology

The biodegradability of coking wastewater is poor, and the water quality and water volume fluctuate greatly. Generally, the secondary biochemical treatment of coking plants can usually control the concentration of ammonia nitrogen at 10-20mg / L, and the concentration of COD at 200-400mg / L, which cannot stably meet the current implementation of the coking chemical industry. Pollutant discharge standard GB16171-2012 requires indirect emission COD to be less than 150mg / L, and direct emission COD to be less than 80mg / L. Advanced treatment must be carried out to ensure emission compliance.

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