Reactor for sewage treatment and phosphorus recovery and method for recovering phosphorus by using same

A technology for sewage treatment and reaction device, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. Good effect, efficient recovery, and the effect of improving purity

Active Publication Date: 2015-07-15
GRANDBLUE ENVIRONMENT CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these two methods of phosphorus removal have achieved the purpose of phosphorus removal in sewage, the pollutants in the phosphorus-containing sludge formed are complex and cannot be recycled and utilized. Generally, the sludge is disposed of after dehydration

Method used

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  • Reactor for sewage treatment and phosphorus recovery and method for recovering phosphorus by using same
  • Reactor for sewage treatment and phosphorus recovery and method for recovering phosphorus by using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Get urban sewage and utilize device among the present invention to carry out sewage treatment and phosphorus recovery:

[0027] 1) Nitrogen removal: Wastewater is denitrified through the anoxic biological filter and the aerobic biological aerated filter in sequence; Water load is 1kgCOD / m 3 d;

[0028] 2) Phosphorus removal: the wastewater treated in step 1) is passed through the anaerobic membrane biological reaction tank, phosphorus salt flocculation tank, phosphorus salt sedimentation tank and aerobic membrane biological reaction tank for circular phosphorus removal treatment, and then the sewage treatment and phosphorus recovery are completed Wherein, the anaerobic membrane bioreaction tank maintains an oxidation-reduction potential of -50mv under stirring conditions; the dissolved oxygen in the aerobic membrane bioreaction tank is 1.7mg / L, the sludge reflux ratio is 30%, and the filling ratio of the suspended biological filler is 0%, and the reflux ratio of phosp...

Embodiment 2

[0030] Get urban sewage and utilize device among the present invention to carry out sewage treatment and phosphorus recovery:

[0031] 1) Nitrogen removal: Wastewater is denitrified through the anoxic biological filter and the aerobic biological aerated filter in sequence; Water load is 1.5kgCOD / m 3 d;

[0032] 2) Phosphorus removal: the wastewater treated in step 1) is passed through the anaerobic membrane biological reaction tank, phosphorus salt flocculation tank, phosphorus salt sedimentation tank and aerobic membrane biological reaction tank for circular phosphorus removal treatment, and then the sewage treatment and phosphorus recovery are completed ; Wherein, the anaerobic membrane bioreaction tank is under stirring conditions, the redox potential is -50mv; the dissolved oxygen in the aerobic membrane bioreactor tank is 1.7mg / L, the sludge reflux ratio is 50%, and the filling ratio of the suspended biological filler is 20 %, the internal circulation phosphorus recover...

Embodiment 3

[0034] Get urban sewage and utilize device among the present invention to carry out sewage treatment and phosphorus recovery:

[0035] 1) Nitrogen removal: Wastewater is denitrified through the anoxic biological filter and the aerobic biological aerated filter in sequence; Water load is 2kgCOD / m 3 d;

[0036] 2) Phosphorus removal: the wastewater treated in step 1) is passed through the anaerobic membrane biological reaction tank, phosphorus salt flocculation tank, phosphorus salt sedimentation tank and aerobic membrane biological reaction tank for circular phosphorus removal treatment, and then the sewage treatment and phosphorus recovery are completed Wherein, the anaerobic membrane bioreaction tank is under stirring conditions, and the redox potential is -100mv; the dissolved oxygen in the aerobic membrane bioreactor tank is 1.8mg / L, the sludge reflux ratio is 80%, and the filling ratio of the suspended biological filler is 30 %, the reflux ratio of phosphorus recovery in...

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Abstract

The invention discloses a reactor for sewage treatment and phosphorus recovery, which comprises an anoxic biological filter tank, an aerobic aeration biological filter tank, an anaerobic membrane biological reaction tank, a phosphorus salt flocculation tank, a phosphorus salt precipitation tank and an aerobic membrane biological reaction tank. The invention also discloses a method for recovering phosphorus by using the reactor for sewage treatment and phosphorus recovery. The reactor implements high-efficiency recovery of phosphorus in the sewage treatment process, the prepositive secondary BAF (biological filter tank) device has a prepurification function on sewage before phosphorus recovery, thereby enhancing the phosphorus recovery purity; the secondary MBR (membrane biological reaction tank / device) is beneficial to recovering high-phosphorus water; and the investment of the internal circulation phosphorus recovery system is less than that of any other phosphorus removal method.

Description

technical field [0001] The invention relates to sewage treatment, in particular to a reaction device for sewage treatment and phosphorus recovery and a method for recovering phosphorus by using the same. Background technique [0002] Phosphorus and nitrogen in sewage are the main factors leading to eutrophication of water bodies. In modern sewage treatment technology, phosphorus as the main pollutant removal index has attracted more and more attention. In recent years, the national environmental protection department has continuously improved sewage discharge standards. Phosphorus discharge concentration is increased from 1.0 mg / L of the national urban sewage discharge level B standard to 0.5 mg / L of the first level A standard. The increasingly stringent discharge standards mean that the amount of phosphorus removal will increase. Taking a sewage treatment plant with a daily processing capacity of 100,000 tons as an example, based on the calculation of the average total phos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 谢义忠李欣冯绮澜高伟业
Owner GRANDBLUE ENVIRONMENT CO LTD
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