Sequencing-batch type mobile filtration bed sewage treatment method and device

Abstract

The invention belongs to the field of sewage treatment and particularly relates to a sewage treatment method and device which are integrated with sequencing-batch type operation, mobile-bed biofilm process and deep-bed filtration. The device comprises a reactor body, grained media filter and a movable catchment component which is still smaller than water in proportion after biofilm formation. The reactor performs operations on water inflowing, reacting, standing and water outflowing according to the sequencing batch type, and pollutants in inflowing water are degraded or mineralized under common action of a biofilm and activated sludge in the reactor; during the standing period, when a bed layer of certain thickness is formed in a floating manner on the media filter loading the biofilm, water subjected to reacting is enabled to move upwards relative to the bed layer of the media filler, solid-liquid separation of the inflowing water is strengthened through filtration of the bed layer of the media filler, and the water penetrating the bed layer of the media filler is led out from the reactor to become reacted inflowing water. The reactor completing water outflowing can enter the operation period of the next sequencing batch. The sequencing-batch type mobile filtration bed sewage treatment method and device is specially suitable for treatment of domestic sewage of small and tiny type villages.

Description

1. Technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a sewage treatment method and a device thereof integrating sequence batch operation, moving bed biofilm method and deep bed filtration. 2. Background technology [0002] The sewage treatment method of moving bed biofilm retains the advantages of biofilm method, such as higher sludge concentration, long sludge age and no need for sludge return, by loading biofilm on the surface of suspendable particle filler, while avoiding the advantages of fixed bed biofilm. The membrane method has the disadvantages of regular backwashing, etc. It is a new type of sewage treatment process that has been popularized and applied. Its main disadvantage is that the single moving bed biofilm method usually does not have the ability of denitrification and denitrification. In addition, the mixed liquid after the reaction needs to be subjected to solid-liquid separation operations...

AI Technical Summary

Problems solved by technology

Since the conventional sequencing batch reactor method generally realizes the mud-water separation after the reaction by standing and settling, it may affect the reactor effluent water quality due to poor settling and separation effects, and may cause a large amount of activated sludge loss and cause the reactor to fail.

[0004] The shortcomings of the above two processes may be easier to overcome in large-scale sewage treatment, but both processes are commonly used in small and micro sewage treatment. In this case, their limitations are not conducive to further improving the technical economy of the process performance

[0005] There are some invention patents that record the addition of suspendable granular fillers in the sequencing batch reactor to improve the removal effect of organic matter and total nitrogen in sewage treatment (CN201010246280.6, CN201110428049.3), but the solid-liquid separation effect is still not solved bad question

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