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Method for treating urban sewage through denitrifying process for phophorous removal and defluorination in biomembrane system in sequential batch mode

A sequencing batch biofilm, denitrification and phosphorus removal technology is applied in the direction of sustainable biological treatment, chemical instruments and methods, water/sewage treatment, etc., which can solve the problems that cannot continue, and achieve the reduction of sludge treatment volume, sewage treatment, etc. The effect of less mud production and carbon source saving

Inactive Publication Date: 2004-10-27
GUANGZHOU UNIVERSITY
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Problems solved by technology

[0006] 4. The nitrification process provides nitrate for the denitrification process, but when the nitrification process itself has too much nitrate, it will inhibit the nitrification process and make the whole process unable to continue;

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  • Method for treating urban sewage through denitrifying process for phophorous removal and defluorination in biomembrane system in sequential batch mode

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Embodiment Construction

[0026] As shown in Figure 1, the sewage to be treated is urban domestic sewage, and the sewage treatment steps are as follows:

[0027] 1. Water intake period: the raw water alternately enters the first-stage reactors A and B at intervals of 4 hours;

[0028] 2. Anaerobic period: the raw water is anaerobically circulated in A and B for 2 hours to release phosphorus;

[0029] 3. Standing internal water change period: After the first-stage reactor undergoes anaerobic circulation, it is left to settle for 0.5 hours, and the supernatant with high concentration of phosphorus is discharged into the second-stage reactor at night;

[0030] 4. Nitrification reaction period: In the second-stage reactor, the high-phosphorus water from the first-stage reactor after static precipitation undergoes aerobic aeration for 3.5 hours to carry out nitrification reaction;

[0031] 5. Reflux in the nitrification liquid: After the nitrification reaction in the second-stage reactor, let it settle for...

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Abstract

A process for treating city sewage in batches by use of biomembrane system includes 8 steps including inputting raw sewage in reactors A and B alternatively by 4 hrs, anaerobic circulation in A and B for 2 hrs to release phosphorus, laying A aside for 0.5 hr and discharging its supernatant in B, etc. Its advantages are use of denitrating phosphorus-collecting bacteria to remove phosphorus and nitrogen, and high treating effect.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a method for treating urban sewage by denitrification, phosphorus and nitrogen removal in a sequencing batch biofilm system. Background technique [0002] In recent years, with the rapid development of the economy, the requirements for environmental quality are getting higher and higher. Urban sewage treatment technology has made great progress. With the continuous improvement of the requirements for phosphorus and nitrogen removal, the activated sludge method of urban sewage treatment process has obtained a development process from theory to practice. The adsorption-biodegradation method (AB method) with phosphorus and nitrogen removal effects, Anaerobic-aerobic method (AO method), anaerobic-anoxic-aerobic method (A 2 O method), oxidation ditch method, and sequencing batch activated sludge method have been developed rapidly. In these biological nitrogen ...

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Application Information

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IPC IPC(8): C02F1/58C02F9/14
CPCY02W10/10
Inventor 张可方荣宏伟方茜
Owner GUANGZHOU UNIVERSITY
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