A kind of wastewater treatment method of composite biofilm method and bioreactor

Abstract

A method for treating sewage and wastewater using a composite biofilm method and a bioreactor. Sewage and wastewater are sequentially processed by a composite biofilm process, a cloth bioreactor process, and a microfiltration membrane filter process, and then the water reaches the standard; at the same time, the online cleaning Composite biofilm components including reaction packing carrier, adsorption filter packing carrier and filter membrane core components of composite biofilm process, MBR membrane reaction components of cloth bioreactor process and microfiltration of microfiltration membrane filter process Membrane core components are cleaned, etc. The present invention has the advantages of small footprint, simple process, high effluent quality, long sludge residence time, and low polluted sludge yield. Wastewater is treated in an orderly, continuous, cyclical, progressive, and compact arrangement. The manufacturing cost of the MBR membrane reaction module and its engineering cost are relatively low, and the engineering operation cost is low and the cost performance is high.

Description

technical field [0001] The invention belongs to the technical field of sewage and wastewater treatment methods and devices. 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 t...

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Problems solved by technology

[0005] 3. During the operation, the membrane is easily polluted, and the membrane flux decreases rapidly. This is because the membrane pore size is 0.4um-0.1um, so that the deposition of particles on the membrane surface, bacteria and macromolecules on the membrane surface are uniform. 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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