A highway service area sewage treatment system

By introducing a pre-sedimentation tank and a movable baffle structure into the sewage treatment system of highway service areas, and dynamically adjusting the biological treatment unit, the problems of decreased MBR membrane flux and high energy consumption were solved, achieving efficient and low-cost sewage treatment, extending membrane lifespan, and improving effluent quality.

CN224394745UActive Publication Date: 2026-06-23LIAONING TRAFFIC KEXUE RES YUAN
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
LIAONING TRAFFIC KEXUE RES YUAN
Filing Date
2025-07-24
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

In the wastewater treatment system of highway service areas, long-term operation of membrane bioreactors (MBRs) leads to a decrease in membrane flux, an increase in transmembrane pressure difference, an increase in cleaning frequency and energy consumption, and a deterioration in effluent quality. Furthermore, the treatment load varies significantly with the seasons and passenger flow.

Method used

Design a system comprising an equalization tank, a water treatment tank, a pre-sedimentation tank, and an MBR membrane tank. The pre-sedimentation tank pre-treats suspended solids in wastewater. Combined with movable baffles and a reflux structure, the operating mode of the biological treatment unit is dynamically adjusted to adapt to fluctuations in wastewater volume, reduce the risk of MBR membrane fouling, and extend membrane life.

Benefits of technology

It effectively removes suspended solids and colloidal substances from wastewater, reduces the risk of high-load operation of MBR membranes, extends membrane life, reduces cleaning frequency and energy consumption, improves effluent quality, adapts to peak and off-peak wastewater flow fluctuations, and reduces operating costs.

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Abstract

This utility model relates to the field of wastewater treatment technology and discloses a wastewater treatment system for a highway service area, comprising: an equalization tank, a water treatment tank, a pre-sedimentation tank, and an MBR membrane tank; the water treatment tank includes an anoxic tank and an aerobic tank, the equalization tank and the anoxic tank are connected, the anoxic tank and the aerobic tank are connected, the aerobic tank and the pre-sedimentation tank are connected, and the pre-sedimentation tank and the MBR membrane tank are connected. The pre-sedimentation tank is used to pre-treat suspended solids in the wastewater entering the MBR membrane tank. This application, by setting up a pre-sedimentation tank to pre-treat suspended solids in the wastewater entering the MBR membrane tank, can effectively remove most of the suspended solids and some colloidal substances from the wastewater, avoid high-load operation of the MBR membrane, reduce the risk of membrane fouling, extend membrane life, reduce cleaning frequency and energy consumption, and improve effluent quality.
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