A kind of waste water treatment method of cloth bioreactor and microfiltration membrane filter

Abstract

A method for treating sewage and waste water using a cloth bioreactor and a microfiltration membrane filter. The sewage and waste water are sequentially treated by a cloth bioreactor process and a microfiltration membrane filter process, and then the effluent reaches the standard; The MBR membrane reaction component of the filter process and the microfiltration membrane core component of the microfiltration membrane filter process are cleaned. The MBR membrane reaction component and the microfiltration membrane core component are integrated devices, so that they have the function of regular offline cleaning. The invention has the advantages of small footprint, simple process, high effluent quality, long sludge residence time, low yield of polluted sludge, reasonable, efficient and stable treatment of sewage and wastewater, low engineering cost of MBR membrane reaction components, and engineering operation. Significant advantages of low cost and high cost performance.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment technology. Background technique [0002] Membrane-bioreactor process, or MBR process, is a new sewage treatment technology that combines membrane separation technology and biotechnology. At present, most of the filter media in membrane bioreactors used in industrial applications are hollow fiber membranes or flat membranes. It is 0.1um-0.4um, which can trap the activated sludge and macromolecular organic matter in the biochemical reaction tank, so the concentration of activated sludge is greatly increased, and the hydraulic retention time (HRT) and sludge retention time (SRT) can be controlled separately. The secondary settling tank is omitted, and then the activated sludge in the reactor biodegrades the organic matter in the sewage and the refractory substances can be continuously reacted and degraded in the reaction tank, and the degraded water is filtered out through the membrane...

AI Technical Summary

Problems solved by technology

[0005] 3. During operation, the membrane is easily polluted, and the membrane flux decreases rapidly. This is because the membrane pore size is 0.1um-0.4um, so that the deposition of particles on the surface of the membrane, bacteria and macromolecules on the surface of the membrane, etc. Absorption or entry into the membrane material, or clogging of the membrane pores

If it is not cleaned and maintained in time, the water production will be reduced and the effluent water quality will not meet the standard, and the service life of the accelerated membrane material will be short, which will cause inconvenience to operation and maintenance management, resulting in high operating costs;

[0006] 4. Membrane separation materials in membrane bioreactors currently used in industrial applications are mostly hollow fiber membranes or flat membranes, with a membrane pore size of 0.1um-0.4um. Taking flat membranes as an example, the operating flux of the membrane elements is 10L / ㎡﹒ h-50L / ㎡. h, obviously because of the low water yield of the membrane elements, in the engineering design and implementation of sewage treatment, the required membrane area should be matched in direct proportion to the accumulation of the number of membrane elements, that is, the smaller the membrane pore size, the smaller the number of membrane elements. In order to meet the water production rate (membrane flux) required for engineering design and implementation, the membrane area must be increased and accumulated, so the manufacturing cost of the membrane separation material and the engineering cost are relatively high, so that the MBR membrane reaction The cost performance of the device is poor, which hinders its wide application and use value

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