Deep nitrogen-removing technology based on SBR

Abstract

The invention discloses a deep nitrogen-removing technology based on a SBR, and belongs to the technical field of environment engineering. The SBR equipment is adopted, sewage in the SBR runs in an anaerobic, low-oxygen and oxygen-deficit mode, PHA is stored for anaerobic-period microorganisms, and the favorable condition is provided for nitrite denitrifying phosphorus accumulating in the low oxygen period. Under the condition of the usual domestic-sewage carbon nitrogen ratio, an internal carbon source existing in the PHA mode is still surplus in the aerobiotic last phase, and can provide a carbon source for denitrification nitrogen removing of the later oxygen-deficit period. By accurately controlling low-oxygen-period time and post-oxygen-deficit-period time, accurate controlling over the ammoxidation process and the denitrification process is achieved, and therefore deep nitrogen removing of the sewage is achieved. When the device runs for a certain period, anaerobic phase time isprolonged, or an external carbon source is added into a reactor in the anaerobic initial stage for intensifying phosphorus release, so that the activity of phosphorus-accumulating bacteria is enhanced, and the phosphorus removing effect is improved.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and in particular relates to a deep denitrification process based on SBR. Background technique [0002] With the development of society and economy, people's demand for water resources continues to increase. At present, in small flow decentralized sewage treatment projects, such as rural village sewage treatment projects and urban community sewage treatment, many of them have adopted the SBR process (sequence Batch-type activated sludge method, also known as batch-type activated sludge method), but there is a problem that the water quality of the equipment, especially the total nitrogen and total phosphorus, cannot meet the requirements of the discharge standards. Contents of the invention [0003] In order to solve the above problems, the present invention discloses a deep denitrification process based on SBR, and proposes a series of measures to improve the water quality of ...

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Problems solved by technology

[0002] With the development of society and economy, people's demand for water resources continues to increase. At present, in small flow decentralized sewage treatment projects, such as rural village sewage treatment projects and urban community sewage treatment, many of them have adopted the SBR process (sequence Batch-type activated sludge method, also known as batch-type activated sludge method), but there is a problem that the effluent water quality of the equipment, especially the total nitrogen and total phosphorus, is difficult to meet the discharge standard requirements

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