V shaped groove type microgrid component capable of continuously on-line updating dynamic membrane and use method thereof

Abstract

The invention relates to a V-shaped slot type micronet assembly and an application method for continuously renewing a dynamic film on line, which comprises a porous filter supporting a dynamic film. The V-shaped slot type micronet assembly is characterized in that the porous filter is a flat-cylindrical micronet net body formed by a plurality of layers of micronets of various calibers which are superposed, fixed into shape and connected sequentially by a plurality of concentric annular V-shaped slots, a sleeve shell is arranged outside the porous filter, and the bottom of the porous filter is hermetically connected with a bottom net; a plurality of closed net chambers internally provided with ceramic granule balls are formed between the micronet net body and the bottom net; the center of the micronet net body is provided with a hollow shaft pipe, a baffle is arranged in the hollow shaft pipe, and the hollow shaft pipe above the baffle is connected with a rotary driving mechanism, a water source and a reverse flushing water pipe with a liquid spray head; the hollow shaft pipe under the baffle is connected with an air source and an air injection pipe arranged under the net body, and 0.5 percent or 1 percent of environment mineral material is added into mixed liquid in application. The invention has the advantages of low manufacturing cost, small size, high flux, good out-water quality, high water-outlet rate, power and control system optimization and simplification, low energy consumption and low cost.

Description

technical field [0001] The invention relates to a membrane module for membrane bioreactor technology in the field of sewage and wastewater treatment, in particular to a membrane module with the synergistic effect of environmental minerals, microbial bacteria micelles and micro-filter screens (commonly referred to as micro-screens in the industry) to achieve micro-filtration solid-liquid separation The V-groove micro-grid component capable of continuously updating the dynamic film online and its application method. Background technique [0002] The research and development of membrane bioreactor (Membrane Bio Reactor, referred to as MBR) has only a history of nearly 30 years, and the real scale application has been less than 20 years. It is a new type of water treatment device that combines sewage and wastewater biological treatment technology with membrane separation technology. The high-quality solid-liquid separation effect of the membrane bioreactor process and the high-...

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Problems solved by technology

Cross-flow is the use of turbulent flow shearing and scouring to inhibit the accumulation of pollutants on the membrane surface, which is very effective for MBR membrane modules to reduce pollution, but it is not suitable for active and flexible dynamic membranes that use pollutants for solid-liquid separation. However, it will have adverse effects: the turbulent flow will make the texture soft, and the adhesion to the filter screen will be weak, especially after the metabolic process of generation, growth, maturity, weakness, and death, the biomass layer that itself will appear non-periodic shedding is easier to use It breaks away from the micro-network, causing the suspended matter to leak irregularly; the cross-flow not only reflects the surface shearing and scouring effect, but also has the normal vibration effect on the membrane surface. This normal vibration makes the growth of the membrane layer impossible to be uniform, and the center of the membrane surface It is difficult to form an effective gel layer because the amplitude of the vibration is too high. Therefore, the dynamic membrane operating in the cross-flow mode has a poor interception effect on the dissolved organic matter with a large molecular weight; the cross-flow shear scour and normal vibration can also easily make the dynamic There are "holes" in the film layer, which makes the turbidity of the effluent fluctuate irregularly and is difficult to control at a high level, and the total number of bacteria exceeds the standard; especially in the process of backwashing due to the thickening of the film layer, too much attached dirt, and the decrease in flux A large enough flow of water or air-mixed water is required to make the backwashing equipment have a large capacity, resource consumption, high energy consumption, intermittent use, and high equipment idle rate; after backwashing, a large amount of unfiltered waste will be generated during the dynamic membrane regeneration Interfering with water, making it difficult to increase the water yield

These adverse effects cause the existing dynamic membrane technology to be in the technical bottleneck of unstable effluent water quality, difficulty in enlarging the membrane area, low water yield, and inability to realize large-scale application, which limits the engineering application of dynamic membrane technology

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