Internal recycle sequencing batch type biomembrane wastewater treatment device

Abstract

The invention relates to an internal recycle sequencing batch type biomembrane wastewater treatment device. The device comprises a water box connected with a reactor by a pipe through a water pump and a water distribution head; the the reactor is internally provided with a filler bed for fixing fibrous fillers, a water distribution head connected with the water pump and an aeration head connectedwith an aerator; the water pump, the aerator, a valve and an internal recycle pump are connected with a time controller; the device is characterized in that the reactor internally comprises the internal recycle pump, the internal recycle pump is connected with an internal recycle pipe, and the water outlet of the internal recycle pipe is positioned at the upper end of the reactor; and the water distribution head is also connected with the valve to realize water drainage function. Therefore, the invention aims at the defect that a spiral agitator cannot be installed on the fiber filler bed inside the reactor, and the internal recycle pump is installed inside the reactor of the fiber filler bed so as to guarantee upper filler layer to obtain sufficient nutrients, thereby improving the fixation amounts of nitrifying bacteria and denitrifying bacteria, guaranteeing short hydraulic retention time, precipitating out the water with better quality, and having low maintenance cost.

Description

technical field [0001] The invention belongs to the field of water treatment equipment, and in particular relates to an internal circulation sequencing batch type biofilm sewage treatment device. Background technique [0002] Biofilm sewage treatment is a technology that makes microorganisms such as nitrifying bacteria and denitrifying bacteria fix on the surface of the filler and grow in the form of a film to achieve sewage treatment. Generally, it can be divided into biological filter, biological turntable, biological contact oxidation method, etc. Although their structures are quite different, their basic principles are the same, that is, the solid-liquid two-phase mass transfer is carried out through the contact between wastewater and biofilm. Biofilm biodegrades organic matter, enabling wastewater to be purified. Because biofilm usually has a large specific surface area, it can absorb a large amount of organic matter in wastewater, and has a strong ability to oxidize a...

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Problems solved by technology

[0003] The patent "Method of Sequential Batch Biofilm Treatment of Urban Sewage" (application number 02134805.7) adopts sequential batch operating conditions, adding biofilm fillers in the reactor, but adopts an external circulation method to meet the growth of biofilms on the upper layer of fillers. Disadvantages such as uneven distribution of water and large shear force of circulating water on the underlying biofilm affect the growth of biofilm on the filler

Patent "Using Ciliary Biofilm to Treat Sewage and Wastewater and Its Device" (Patent No. 92101982.3) and Patent "Chromaticity and Organic Matter, Nitrogen, Efficient Phosphorus Treatment Method" (Patent No. ZL01116592.8) has fully utilized the advantages of ciliated biofilms, but the process is complicated and the construction cost is high

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