Activated sludge process and biofilm process combined wastewater treatment device

Abstract

The invention relates to an activated sludge process and biofilm process combined wastewater treatment device. The device comprises a treatment tank, a partition plate is fixed in the treatment tank,a wastewater inlet pipe is connected to a water distribution cavity, and a gap is formed between a lower end of the partition plate and a bottom wall of the treatment tank. A microporous aerator is arranged at a bottom of the reaction cavity, the microporous aerator is connected with an aeration pipeline, a filler frame is arranged in the reaction cavity, a combined filler is suspended on the filler frame, a sedimentation tank is attached to one side of the treatment tank, an upper end of the reaction cavity is level with an upper end of the sedimentation tank to form an overflow port, an upper part of the sedimentation tank is provided with a water outlet, the water outlet is lower than the overflow port, a bottom of the sedimentation tank is provided with a sludge return pipeline, the sludge return pipeline is provided with a sludge pump and a return switch, and a bottom of the treatment tank is provided with a sludge outlet. The device is simple in structure and small in occupied area, the concentration of activated sludge can reach 5-6 g / l, the removal rate of COD, BOD and ammonia nitrogen is up to 90% or above, the total nitrogen removal efficiency is 60% or above, and the operation cost is low.

Description

technical field [0001] The invention relates to a sewage treatment process, in particular to a waste water treatment device combined with an activated sludge method and a biofilm method. Background technique [0002] At present, there are mainly two methods for biological treatment of sewage: activated sludge method and biofilm method. [0003] Among them, the activated sludge method is a kind of wastewater biological treatment technology with activated sludge as the main body. The removal rate of BOD and suspended solids in the activated sludge method is very high, reaching 90-95%, but there are the following technical deficiencies: activated sludge The sludge concentration of the method is limited, and the activated sludge concentration in the aeration tank is generally 2-4g / l; in addition, the denitrification and denitrification effect of the activated sludge method is poor, and the activated sludge in the aeration tank is generally based on carbonizing bacteria and Nitr...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of activated sludge method and biofilm method combined waste water treatment device and treatment method, to solve the problem in the prior art that the activated sludge method or biofilm method sludge concentration is too low and the treatment efficiency is low , The problem of poor sludge settling performance

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