Deep nitrogen-and-phosphorus-removing technology based on SBBR

Abstract

The invention discloses a deep nitrogen removing technology based on a SBBR, and belongs to the technical field of environment engineering. The SBBR equipment is adopted, sewage in the SBBR runs in ananaerobic, 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. 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, andtherefore deep nitrogen removing of the sewage is achieved. When the device runs for a certain period, an external carbon source is added into a reactor for intensifying phosphorus release in the anaerobic initial stage, stirring is stopped in the anaerobic last phase, the mixed liquid is subjected to standing and settling, then phosphorus-rich supernatant is discharged into a phosphorous removingsettling pond, and water is newly fed into the SBBR to enter normal period running. A chemical phosphorus removing chemical is put into the phosphorus-rich supernatant discharged into the phosphorousremoving settling pond to generate sediment fixed phosphorus, the supernatant after being subjected to phosphorus removing enters a water feeding pond of the SBBR to be continue to treat. The efficient nitrogen-and-phosphorus-removing effect is achieved through the measures.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and in particular relates to a deep denitrification and dephosphorization process based on SBBR. Background technique [0002] my country has a vast territory and the structure of rural villages is complex. From an economic point of view, rural sewage is more suitable for decentralized collection and treatment. Distributed treatment often uses integrated treatment equipment due to the small amount of water. Among the sewage treatment technologies used are MBR process, contact oxidation process and so on. However, the effect of rural sewage treatment is still unsatisfactory due to the disadvantages of large investment, high operating cost, difficult operation and management, or unqualified effluent quality in the process technology itself. With the gradual strict management of rural sewage discharge, the traditional treatment technology has been difficult to meet the requiremen...

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Problems solved by technology

However, the effect of rural sewage treatment is still unsatisfactory due to the disadvantages of large investment, high operating cost, difficult operation and management, or unqualified effluent quality in the process technology itself.

With the gradual strict management of rural sewage discharge, the traditional treatment technology has been difficult to meet the requirements. Therefore, the development of new technologies suitable for decentralized sewage treatment in rural areas and communities, especially the technology to achieve efficient nitrogen and phosphorus removal has become an important issue. urgent need

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