Sequencing batch type suspended filler biofilm sewage treatment device

Abstract

The invention relates to a sequencing batch type suspended filler biofilm sewage treatment device. The device comprises a water tank, wherein the water tank is connected with a reactor through a pipeline, a water pump and a water distribution head; a helical stirrer, an aeration head and the water distribution head are arranged in the reactor; the aeration head is connected with an aerator; the water distribution head is connected with the water pump; the water pump, the aerator, the helical stirrer and a valve are connected with a time controller; the device is characterized in that a suspended filler is also filled in the reactor; the suspended filler is plastic polyhedral hollow balls or polyurethane netlike sponge blocks; and the water distribution head is also communicated with the valve and plays a role in drainage. The device of the invention has the advantages of both a biofilm method and an active sludge method and an improved sequencing batch type operating mode is adopted, so the device can automatically control the water feeding time, aeration time, sedimentation time, drainage time and stirring time and ensure the removal effect of COD, ammonia nitrogen and total nitrogen and thus is one sequencing batch type suspended filler sewage treatment device suitable for various kinds of sewage / waste water and river water.

Description

technical field [0001] The invention belongs to the field of water treatment equipment, and in particular relates to a sequence batch type suspended filler 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 very different, their basic principles are the same, that is, through the contact between wastewater and biofilm, the mass transfer of solid-liquid two-phase is carried out. Biofilm biodegrades organic matter, enabling wastewater to be purified. The biofilm method has a high treatment efficiency and has obvious effects on water bodies slightly polluted by organic matter and ammonia nitrogen. However, the...

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Problems solved by technology

The activated sludge method has the advantages of large processing capacity, high processing efficiency and good effluent quality. Its various deformation processes have good nitrogen and phosphorus removal performance, and have been widely used in urban sewage treatment; its disadvantage is that it is not enough Stable, easy to produce sludge bulking and large sludge output, poor treatment effect on low-concentration sewage

The biofilm method has the advantages of stable operation, less residual sludge, simple management, strong ability to remove ammonia nitrogen and refractory pollutants, and can adapt to a wide range of water quality changes; the disadvantages of the fixed-fill biofilm sewage treatment device are: packing and Its supporting structure requires a high initial investment, and the fine particles produced by the biofilm shedding are not easy to settle, resulting in high turbidity of the effluent, easy plugging of the filler, and weak removal capacity of total nitrogen and total phosphorus

The patent "Film Hanging Method for Fillers in Biological Contact Oxidation Pool" (Patent No. ZL200710061583.9) cannot fully satisfy the growth of nitrifying bacteria and denitrifying bacteria on the biofilm and achieve the purpose of removing total nitrogen

The patent "Sewage Aerobic Biofilm Treatment Device" (Patent No. ZL 02157780.3) uses fixed packing to attach biofilm, but the falling biofilm is easy to block the packing, which obviously affects the sewage treatment effect

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