Device and method capable of realizing simultaneous phosphorus and nitrogen removal from sewage in low C/N ratio by coupling enhanced biological phosphorus removal with simultaneous shortcut nitrification and denitrification

A technology of simultaneous denitrification and phosphorus removal and short-range nitrification, which is applied in the field of devices for simultaneous denitrification and phosphorus removal of sewage with low C/N ratio. Effect

Active Publication Date: 2016-09-07
BEIJING UNIV OF TECH
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Problems solved by technology

[0002] Traditional biological denitrification technology can have a good treatment effect for general domestic wastewater, but for low-carbon and high-nitrogen se

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  • Device and method capable of realizing simultaneous phosphorus and nitrogen removal from sewage in low C/N ratio by coupling enhanced biological phosphorus removal with simultaneous shortcut nitrification and denitrification
  • Device and method capable of realizing simultaneous phosphorus and nitrogen removal from sewage in low C/N ratio by coupling enhanced biological phosphorus removal with simultaneous shortcut nitrification and denitrification

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the drawings and embodiments: figure 1 As shown, an enhanced biological phosphorus removal coupled with synchronous short-cut nitrification and denitrification to achieve a low C / N ratio sewage synchronous nitrogen and phosphorus removal device is characterized by comprising a raw water tank 1, an enhanced biological phosphorus removal coupled with synchronous short-cut nitrification and denitrification SBR reactor 2. Mud storage tank 3, water outlet tank 4. Online monitoring and feedback control system; wherein the raw water tank 1 is connected to the enhanced biological phosphorus removal coupling synchronous short-cut nitrification and denitrification SBR reactor 2 through the inlet pump 2.1; enhanced biological phosphorus removal The coupled synchronous short-cut nitrification and denitrification SBR reactor 2 is connected to the effluent tank 4 through the electric drain valve 2.9; the enhanced ...

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Abstract

The invention discloses a device and a method capable of realizing simultaneous phosphorus and nitrogen removal from sewage in a low C/N ratio by coupling enhanced biological phosphorus removal with simultaneous shortcut nitrification and denitrification and belongs to the field of biological sewage treatment. After entering an SBR coupling enhanced biological phosphorus removal with simultaneous shortcut nitrification and denitrification, sewage is first subjected to anaerobic stirring, and GAOs (glycogen-accumulating organisms) and PAOs (phosphorus-accumulating organisms) absorb organic carbon sources from the sewage and synthesize an internal carbon source PHA (polyhydroxyalkanoates) to be stored in bodies; then the sewage is subjected to low-oxygen aeration stirring, AOB (ammonia oxidizing bacteria) play a role in shortcut nitrification to convert ammonia nitrogen into nitrite nitrogen, and the PAOs decompose the PHA for aerobic phosphorus accumulation so as to create a hypoxic microenvironment beneficial to that the GAOs and the PAOs use the nitrite nitrogen produced during shortcut nitrification for endogenous denitrification and denitrifying phosphorus removal respectively. The method coupling enhanced biological phosphorus removal with simultaneous shortcut nitrification and endogenous denitrification is capable of realizing simultaneous phosphorus and nitrogen removal from the sewage in the low C/N ratio without addition of a carbon source, so that oxygen consumption and energy consumption are reduced and urban sewage treatment costs are saved.

Description

Technical field [0001] The invention relates to the technical field of sewage biological treatment, and in particular to a device and method for implementing simultaneous denitrification and denitrification of sewage with low C / N ratio through enhanced biological phosphorus removal coupled with simultaneous short-range nitrification and denitrification Background technique [0002] Traditional biological denitrification technology can have a good treatment effect for general domestic wastewater, but for low-carbon and high-nitrogen wastewater, the fundamental disadvantage of insufficient carbon source limits the denitrification efficiency of traditional heterotrophic biological denitrification devices . [0003] The short-cut nitrification and denitrification technology is to control the nitrification process in the nitrification stage by adjusting the operating conditions, and then carry out the denitrification process, so as to realize the denitrification of sewage. Compared wit...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F101/16C02F101/10
CPCC02F3/301C02F3/308C02F2101/16
Inventor 彭永臻赵骥王晓霞贾淑媛王淑莹
Owner BEIJING UNIV OF TECH
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