Degradable wastewater treatment process based on coupling of EBIS and improved BAF

By using the EBIS and modified BAF coupling process, and utilizing the EBIS and BAF pools with high concentrations of composite functional bacteria and porous filter media, efficient graded treatment and deep purification of recalcitrant industrial wastewater are achieved. This solves the problems of low treatment efficiency, poor stability and high energy consumption in existing technologies, and adapts to the treatment needs of different types of wastewater.

CN121894871BActive Publication Date: 2026-07-24HEJIAN TAIZE IND WASTEWATER TREATMENT CO LTD
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Patent Information

Application Number
CN202610196716.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-02-11
Publication Date
2026-07-24
Estimated Expiration
2046-02-11

AI Technical Summary

Technical Problem

Existing technologies are ineffective in treating high-concentration, recalcitrant industrial wastewater. Conventional biological treatments are inefficient and unstable, while advanced oxidation processes are costly and prone to producing toxic intermediates. Coupled processes lack synergy and cannot meet the treatment needs of different types of wastewater.

Method used

By employing an EBIS coupled with a modified BAF process, high-concentration composite functional bacteria and dissolved oxygen are used to adsorb and catalyze the breakdown of organic matter in the EBIS reactor. Combined with the porous filter media and pulse aeration backwashing mode of the modified BAF tank, a biofilm activated carbon composite functional layer is formed to achieve deep purification. Emergency treatment is achieved through dynamic parameter adjustment and chemically enhanced oxidation.

Benefits of technology

It achieves efficient graded treatment and deep purification of recalcitrant industrial wastewater, improves the biodegradability of wastewater, ensures that the effluent meets standards, reduces energy consumption and sludge discharge, and adapts to the treatment needs of different types of wastewater.

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Abstract

The application discloses a refractory wastewater treatment process based on coupling of EBIS and improved BAF, relates to the technical field of wastewater treatment, and discloses the following technical scheme: EBIS effluent is introduced into an intermediate sedimentation tank for solid-liquid separation, part of the sludge is backflowed to the inlet of the EBIS reactor to maintain high biological concentration, and the remaining sludge is discharged; the supernatant is introduced into an improved BAF tank by gravity, the improved BAF tank is filled with porous modified composite filter material, and a pulse intermittent aeration and air-water backwashing linkage mode is adopted to form a stable biological membrane activated carbon composite functional layer on the surface of the filter material, so that the intermediate metabolites in the EBIS effluent are subjected to deep adsorption and simultaneous nitrification and denitrification biological mineralization. Through the efficient coupling of EBIS and improved BAF, the application realizes the staged treatment and deep purification of refractory industrial wastewater, and effectively solves the problems of low treatment efficiency, poor stability and high energy consumption of single process and traditional coupling process.
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