Process, device and system for biological treatment for internal reflux sewage by magnetic-loading magnetic sludge

Abstract

The invention discloses a process, a device and a system for biological treatment for internal reflux sewage by magnetic-loading magnetic sludge, wherein the process, the device and the system for the biological treatment adopt a completely-mixed type active sludge aeration basin, common active sludge is inoculated and a certain amount of magnetic powder is poured in the basin before running, and the common active sludge and the magnetic powder are gradually cultured to be magnetic active sludge during running. A weakly-magnetic solid-liquid separator is arranged on the upper part of a magnetic active sludge biological reaction basin and close to a liquid level, the separator has a main function of performing separation for magnetic active sludge and water on a sludge-water mixture in the reaction basin, the separated magnetic active sludge directly returns into the magnetic active sludge biological reaction basin to increase sludge concentration and treatment efficiency, and the treated clean water which reaches the standard is directly drained. Via the process, the device and the system disclosed by the invention, the efficiency of degrading pollutants and the capacity of resisting an impact load of the treatment system are improved; and moreover, a secondary sedimentation basin, a sludge reflux system and a sludge concentration basin which need to be arranged in the conventional active sludge process are omitted, so that the process is small in floor area, high in treatment efficiency, simple in structure and low in construction cost.

Description

Technical field [0001] The invention belongs to the technical field of sewage biological treatment, and specifically relates to a sewage treatment process and device system suitable for biochemical treatment of high-concentration organic wastewater. Background technique [0002] At the beginning of this century, magnetic loading technology has begun to be applied to water treatment, but currently it is mainly used in the process of coagulation and sedimentation. The magnetic loading technology is mainly dosing magnetic powder (Fe 3 O 4 ), the magnetic powder acts as a flocculation nucleus to enhance flocculation, which greatly increases the density and particle size of the floc particles. In the subsequent sedimentation part, the sedimentation speed of magnetically loaded flocs is much higher than that of ordinary flocs, which greatly reduces the sedimentation area. Research on the application of magnetic loading technology to sewage biological treatment (activated sludge method...

AI Technical Summary

Problems solved by technology

These two technical methods do not make good use of the characteristics of magnetically activated sludge, the efficiency of solid-liquid separation is much lower than that of magnetic solid-liquid separation, and the concentration of activated sludge in the biological reaction zone is also low

In addition, the gravity type also needs to set up a sedimentation tank, which increases the engineering cost, and cannot use an external magnetic field to improve the activity of microorganisms

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