Composite biological rotary net device and synchronous nitrification and denitrification method thereof

Abstract

The invention discloses a composite biological rotary net device and a synchronous nitrification and denitrification method thereof. The method is characterized by comprising the following steps of: calculating the number of the composite biological rotary net devices to be arranged according to the quantity of waste water to be treated, CODCr (Chemical Oxygen Demand) and the concentration of NH3-N, and placing the composite biological rotary net devices in one same biological reaction tank; adding a microbial agent or introducing activated sludge to form a synchronous nitrification and denitrification period in a process system; starting a reduction box (9) to drive a chain gear (7) to drive an upper rotary frame (3), a lower rotary frame (4) and carriers (10, 11) to rotate, and opening an air pipe valve (8); introducing 1.5-2 mg / L of dissolved oxygen to a water area of the upper rotary frame (3) through a middle single-side aerator pipe (5) so that the dissolved oxygen is provided for a biological film on the biological carrier (10) for an aerobic nitrification reaction; and isolating the diffusion of dissolved oxygen through an oxygen diffusion isolating board (6) and the rotation direction adjustment of the carrier (10). The concentration of water dissolved oxygen on the lower rotary frame (4) is 0.2-1.0 mg / L, and a biological film on the biological carrier (11) performs a biological anaerobic denitrification reaction under anaerobic conditions.

Description

technical field [0001] The invention relates to a wastewater biochemical denitrification treatment device and a simultaneous nitrification and denitrification denitrification treatment method thereof, belonging to the field of wastewater biological denitrification treatment. Background technique [0002] At present, a lot of research and experiments have been done on biological denitrification at home and abroad. The main direction is to carry out around high efficiency, energy saving and reducing operating costs. Among them, there are two most attention-getting ones. One is "short-range nitrification and denitrification". "Biological denitrification technology; the second is "simultaneous nitrification and denitrification" biological denitrification technology. In recent years, these two processes have been used as key research topics in the treatment of high-concentration organic wastewater. There have been successful cases of "short-cut nitrification and denitrification"...

AI Technical Summary

Problems solved by technology

[0003] Traditional wastewater biological denitrification treatment mainly adopts A / O method, A / OO method, A / A / O method, O / A / O method, SBR method, CAST method and oxidation ditch method. The A / O method, A / OO method, A / A / O method, and O / A / O method in the process technology complete the biological nitrification and denitrification denitrification process through the two-stage large-scale nitrification liquid reflux internal circulation. This process method is to accumulate nitroso-nitrogen and nitro-nitrogen through the accumulation of nitrification products, and then carry out denitrification and denitrification. The disadvantage is that the accumulation of nitroso-nitrogen and nitro-nitrogen will affect the biochemical efficiency of the whole system, and Large investment, large area, high energy consumption and operating costs

The SBR method, CAST method and oxidation ditch method are stage nitrification and denitrification denitrification processes. The disadvantages are that the denitrification efficiency is low, it is not easy to apply in the upgrading and transformation of other process technologies, and the energy consumption is high, the operation cost is high, and the operation is complicated. The function of "simultaneous nitrification and denitrification" has no practical significance

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