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Bacteria Screening Filtration - a New High-Efficiency And Low-Consumption Solid-Liquid Separation Technology
2024-08-20 15:43:28
The end of the sewage treatment process is usually a mud-water solid-liquid separation system. Solid-liquid separation refers to the process of removing suspended solids from water or wastewater, including sedimentation, filtration, membrane filtration, filter press, vacuum, and centrifuge. In the activated sludge method, membrane filtration or sedimentation methods are usually used to achieve solid-liquid separation. Microfiltration, clarification, and deep bed filtration can be used to further remove small solid particles in sewage.
Among the commonly used solid-liquid separation technologies, sedimentation tanks occupy a large area, are difficult to maintain, take a long time, are costly, and are not suitable for integrated equipment. Membrane filtration methods usually use MBR membranes, which occupy a relatively small area and have good filtration effects. However, MBR membranes are difficult to maintain, have high energy consumption, and require large investments.
In view of the problems of existing solid-liquid separation technology, such as large floor space, high energy consumption, and difficult maintenance, HYHH has developed a new type of high-efficiency and low-consumption solid-liquid separation device - bacterial screening filtration system. The bacterial screening device is designed based on the practical experience of biofilm sedimentation devices, overcoming the problems of high energy consumption and difficult maintenance of MBR membranes, and giving full play to the advantages of low energy consumption, full automation, and easy maintenance of the bacterial screening device.
The bacterial screen group is composed of several self-generated dynamic biofilms. The self-generated dynamic biofilm is made of special hydrophilic materials as the base material. In the early stage of the mud-water separation process, it is formed by hydraulic cross-flow, microbial secretion of EPS and natural deposition of microbial bacterial groups on the micro-net base material. The self-generated dynamic biofilm uses the osmotic effect of water to achieve unpowered solid-liquid separation, and has a separation effect similar to that of conventional microfiltration/ultrafiltration membranes. At the same time, it can completely separate the Sludge Retention Time(SRT) from the Hydraulic Retention Time (HRT), which is convenient for the control of operating conditions.
Technical parameters
Features
Flux: 50-60 LMH
Regeneration: automatic gas flushing (simple)
Water production: unpowered water production
Energy consumption: extremely low (1-3 kW·h/m3)
Maintenance: simple (no human supervision required)
Concentration: 5000-8000 mg/L
Inlet turbidity: 1000 NTU
Outlet turbidity: <1 NTU
Large flux and fast filtration speed;
Small footprint, fast commissioning, ready for use after installation;
High water output per unit area;
Modular production is possible, facilitating the expansion, renovation and relocation of existing sewage treatment plants.