Micro-net dynamic membrane bioreactor for continuously updating dynamic membrane

Abstract

The invention relates to a bench-scale dynamic membrane bioreactor capable of continuously updating a dynamic membrane, which is characterized in that: a container is divided into an upper aerobic zone and a lower anoxic zone by a separating orifice plate, and an aerator group is arranged on the separating orifice plate; a microgrid component consists of a wave curve-shaped microgrid net body, a casing, a bottom net, 2 to 3 layers of spherical porcelain granules uniformly spread on the bottom net, a backwash nozzle, an air-jet wash-out brush head, a hollow shaft tube, and a rotation driving mechanism, wherein backwash nozzle and the air-jet wash-out brush head are arranged above and under the net body respectively and are positioned on the same plane, and the hollow shaft tube and the rotation driving mechanism drive the backwash nozzle and the air-jet wash-out brush head to rotate continuously; the microgrid component is arranged on the top of a tank horizontally; and the center of the microgrid net body is provided with the hollow tube the inside of which has a built-in separating plate, the part, above the separating plate, of the shaft tube is connected with the rotation driving mechanism, a water source and the backwash nozzle, the part, blow the separating plate, of the shaft tube is connected with an air source and the air-jet wash-out brush head, and the lower end of the hollow shaft tube rotates and is connected with the aerator group in a sealing mode. The invention has the advantages of improving denitrification and dephosphorization effect, achieving microfiltration solid-liquid separation effect, ensuring effluent flux and optimizing and simplifying power and control systems.

Description

technical field [0001] The invention relates to a sewage and wastewater treatment device-membrane bioreactor, in particular to a bioreactor with enhanced denitrification effect and the synergy of environmental minerals, microbial bacteria micelles and micro-filters (industry collectively referred to as micro-nets) A micro-mesh dynamic membrane bioreactor that continuously updates the dynamic membrane synthesized by the membrane module that achieves the effect of microfiltration solid-liquid separation. 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-concentratio...

AI Technical Summary

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 in the metabolic process of birth, growth, maturity, weakness, and death. The micro-network causes irregular leakage of suspended matter; 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. The amplitude is too high and it is difficult to form an effective gel layer. 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; There are "loopholes", which make the turbidity of the effluent fluctuate irregularly and are difficult to control at a high level, and the total number of bacteria exceeds the standard; especially in the process of use, due to the thickening of the film layer, too much attached dirt, and the decrease in flux, sufficient Large flow of water or air-mixed water makes 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 interference water will be generated during the dynamic membrane regeneration , 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

In addition, the existing membrane bioreactor has a single form, the anoxic zone is set outside the reactor, the structure is complicated, and the removal effect on total nitrogen and phosphorus is poor

The above problems limit the wider application of membrane bioreactors

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