The main role of MBR membrane in sewage treatment（污水处理mbr膜起的主要作用）The main functions of MBR membrane in wastewater treatment can be summarized as follows:
Efficient solid-liquid separation:
MBR membrane effectively intercepts pollutants such as activated sludge, macromolecular organic matter, bacteria, and viruses through its microfiltration (MF) or ultrafiltration (UF) membrane components, utilizing the principle of physical sieving.
The membrane pore size is usually ≤ 0.1 μ m, ensuring almost zero suspended solids (SS) in the effluent and achieving efficient solid-liquid separation, which is difficult to achieve in traditional sedimentation tanks.
Significant improvement in effluent quality:
MBR membrane technology can deeply purify sewage, and the effluent quality meets the Class A standard of the “Pollutant Discharge Standards for Urban Sewage Treatment Plants”, or even higher.
The effluent can be directly used for non drinking scenarios such as greening, toilet flushing, and industrial circulating water, achieving the recycling of water resources.
The removal rate of pathogens such as Escherichia coli exceeds 99%, significantly reducing public health risks.
Realize sludge reduction:
The MBR membrane system reduces excess sludge production by approximately 30% by extending the sludge age (SRT>30 days).
This not only reduces the cost of sludge disposal, but also reduces the potential pollution of sludge to the environment.
Enhance the system’s ability to withstand impact loads:
The MBR membrane system maintains a high concentration of activated sludge (8000-10000mg/L), which is 2-3 times higher than traditional processes, significantly improving treatment efficiency.
High sludge concentration enhances the stability of the system, enabling it to better adapt to water quality fluctuations such as industrial wastewater impact.
Small footprint, modular design:
MBR membrane technology does not require a secondary sedimentation tank, and the equipment is compact, greatly reducing the footprint, making it suitable for land scarce areas.
Modular design enables the system to flexibly expand by adding or removing membrane components, adapt to changes in water volume, and improve the scalability and flexibility of the system.
In summary, the main functions of MBR membranes in wastewater treatment include efficient solid-liquid separation, significant improvement of effluent quality, reduction of sludge, enhancement of system shock load resistance, and advantages such as small footprint and modular design. These functions collectively make MBR membrane technology an efficient, reliable, and flexible solution for wastewater treatment.
MBR膜在污水处理中起的主要作用可以归纳为以下几点：
高效固液分离：
MBR膜通过其微滤(MF)或超滤(UF)膜组件，利用物理筛分原理，有效拦截活性污泥、大分子有机物、细菌及病毒等污染物。
膜孔径通常≤0.1μm，确保出水悬浮物(SS)几乎为零，实现高效的固液分离，这是传统沉淀池难以达到的。
显著提升出水水质：
MBR膜技术能够深度净化污水，出水水质满足《城镇污水处理厂污染物排放标准》一级A标准，甚至更高。
出水可直接用于绿化、冲厕、工业循环水等非饮用场景，实现水资源的循环利用。
对病原体(如大肠杆菌)的去除率超99%，大幅降低公共卫生风险。
实现污泥减量：
MBR膜系统通过延长污泥龄(SRT>30天)，减少剩余污泥产量约30%。
这不仅降低了污泥处置成本，还减少了污泥对环境的潜在污染。
增强系统抗冲击负荷能力：
MBR膜系统维持高活性污泥浓度(8000-10000mg/L)，是传统工艺的2-3倍，显著提升处理效率。
高污泥浓度增强了系统的稳定性，使其能够更好地适应水质波动，如工业废水冲击等。
占地面积小，模块化设计：
MBR膜技术无需二沉池，设备紧凑，大大减少了占地面积，适合用地紧张地区。
模块化设计使得系统可以通过增减膜组件灵活扩容，适应水量变化，提高了系统的可扩展性和灵活性。
概括起来，MBR膜在污水处理中起的主要作用包括高效固液分离、显著提升出水水质、实现污泥减量、增强系统抗冲击负荷能力以及占地面积小、模块化设计等优势。这些作用共同使得MBR膜技术成为一种高效、可靠且灵活的污水处理解决方案。
