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Inverted A2/O step feed coupled aerobic particle sludge reinforced synchronous nitrification/denitrification dephosphorization device

A technology of aerobic granular sludge and simultaneous nitrification, which is applied in the field of devices for strengthening biological nitrogen and phosphorus removal, can solve the problem that it is difficult to keep the same dissolved oxygen, so as to increase sewage treatment capacity, prevent sludge expansion and reduce residual The effect of sludge production

Active Publication Date: 2016-06-01
BEIJING UNIV OF TECH
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Problems solved by technology

The aeration uniformity of different aeration devices is different, even if it is stirred, it is difficult to maintain the same dissolved oxygen everywhere in the reactor

Method used

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  • Inverted A2/O step feed coupled aerobic particle sludge reinforced synchronous nitrification/denitrification dephosphorization device
  • Inverted A2/O step feed coupled aerobic particle sludge reinforced synchronous nitrification/denitrification dephosphorization device

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example

[0028] Taking the actual domestic sewage in a family area of ​​a university in Beijing as the treatment object, the water quality is shown in Table 1. Inoculate the return sludge of the sewage plant, the reactor sludge concentration is 3500mg / L, and the sludge return flow is set to 100%. Dosing chemicals appropriately increases the concentration of phosphorus in the influent, and after about 10 days of stable operation, the SVI reaches 73mL / g; start the first two aerobic zone agitators, maintain low-speed stirring, and slightly increase the speed after the operation is stable, increase the COD of the influent, and increase Aerate to 1-1.5mg / L, provide selective pressure, and screen particles; monitor the sludge SVI value during the reaction to maintain the stable operation of the reaction. Obvious particles appear after 35 days of reaction. After 45 days of reaction, the particles are mature and stable, and the MLSS in the aerobic zone Up to 5200mg / L, the treatment effect is s...

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Abstract

The invention relates to an inverted A2 / O step feed coupled aerobic particle sludge reinforced synchronous nitrification / denitrification dephosphorization device, belonging to the technical field of biological methods. In order to solve the problems of high energy consumption by sludge internal reflux, low water-quality water-flow fluctuation resistance and influence of reflux mixed sludge on anaerobic-section phosphorus release effect in the existing UCT step feed, the device combines an inverted A2 / O step feed technique and an aerobic particle sludge process. The new technique has the characteristics of stable denitrification and dephosphorization effects, energy saving, consumption reduction, high water-quality water-flow fluctuation resistance and the like.

Description

Technical field: [0001] The present invention relates to a coupled inversion A 2 / O The device for stepwise water inflow and aerobic granular sludge method to strengthen biological denitrification and dephosphorization belongs to the technical field of biological sewage treatment, and it will invert A 2 The combination of / O segmented water inflow process and aerobic granular sludge process has the advantages of making full use of carbon sources, large amount of treated water, strong resistance to water quality and water impact load, and high stability of treatment effect compared with traditional processes. Background technique: [0002] Inverted A 2 / O segmented water inlet process is coupling inversion A 2 A high-efficiency activated sludge process of the / O process and the staged water inflow process. The process is divided into three stages of water intake, and each stage of water intake is fed in the anoxic section. As mentioned above, the process flow is anoxic, a...

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Application Information

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IPC IPC(8): C02F3/30
CPCC02F3/302C02F3/308
Inventor 彭永臻薛兆骏王慰王淑莹石亮亮
Owner BEIJING UNIV OF TECH
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