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Method for culturing denitrification and dephosphorization function enhanced suspended carrier for IFAS/MBBR process

A technology for denitrification, phosphorus removal, and suspending carriers, which is applied in chemical instruments and methods, adjustment methods for biological treatment, aerobic and anaerobic process treatments, etc. Enhance the effect of less output, reduced sludge volume, and quick start-up

Active Publication Date: 2021-10-29
中冶生态环保集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for cultivating suspension carriers with enhanced denitrification and dephosphorization functions for the IFAS / MBBR process, which solves the problems of long film-hanging time and poor film-hanging effect of the suspension filler in the existing technology, and realizes Enhanced denitrification and dephosphorization functions of sewage treatment plants to ensure water ecological health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of denitrification and dephosphorization function-enhanced suspension carrier culture method used in the IFAS / MBBR process of this embodiment is to dilute the activated sludge collected from the secondary sedimentation tank of the sewage plant to 2g / L and then add it to the reactor, and inject it into the reactor at the same time Phosphorus accumulating bacteria enrichment solution. The enrichment solution of phosphorus accumulating bacteria is 0.1g / L sodium acetate, the ratio of sodium propionate to sodium acetate is 1:1, 0.04g / L ammonium chloride, 0.04g / L potassium dihydrogen phosphate, 0.1g / L bicarbonate Sodium, the concentration of nutrient element concentrate is 1ml / L. The nutrient element concentrate is composed of components with the following mass concentrations: FeCl 3 ·6H 2 O 1.5g / L, H 3 BO 3 0.15g / L, CuSO 4 ·5H 2 O 0.03g / L, KI 0.18g / L, MnCl 2 4H 2 O 0.12g / L, CaCl 2 2H 2 O 11g / L, Na 2 MoO 4 2H 2 O 0.06g / L, ZnSO 4 ·7H 2 O 0.12g / L, CoCl 2...

Embodiment 2

[0034] A kind of denitrification and dephosphorization function-enhanced suspension carrier culture method used in the IFAS / MBBR process of this embodiment is to dilute the activated sludge collected from the A / A / O process anaerobic tank of the sewage plant to 3g / L and then add Into the reactor, the enrichment solution of phosphorus accumulating bacteria is injected at the same time. The enrichment solution of phosphorus accumulating bacteria is 0.3g / L sodium acetate, the ratio of sodium propionate to sodium acetate is 1:2, 0.12g / L ammonium chloride, 0.12g / L potassium dihydrogen phosphate, 0.3g / L bicarbonate Sodium, 1ml / L nutrient element concentrate (component is the same as embodiment 1). Run for 3 hours under anaerobic conditions, 2 hours under aerobic conditions, mechanical stirring speed at 70r / min, pH control at 7.6, and a total of 5 days of operation. Then the density of feeding in the reactor is 0.95g / cm 3 Suspended carrier, the filling ratio is 45%, keep the operati...

Embodiment 3

[0036] A kind of denitrification and dephosphorization function-enhanced suspension carrier culture method used in the IFAS / MBBR process of this embodiment is to dilute the activated sludge collected from the end of the oxidation ditch of the sewage plant to 5g / L and then add it to the reactor, and inject it into the polymer at the same time. Phosphorus bacteria enrichment solution. The enrichment solution of phosphorus accumulating bacteria is 0.5g / L sodium acetate, the ratio of sodium propionate to sodium acetate is 1:3, 0.2g / L ammonium chloride, 0.2g / L potassium dihydrogen phosphate, 0.5g / L bicarbonate Sodium, 1ml / L nutrient element concentrate (component is the same as embodiment 1). Run for 3 hours under anaerobic conditions, 2 hours under aerobic conditions, mechanical stirring speed at 80r / min, pH control at 8.0, and a total of 7 days of operation. Then the density of feeding in the reactor is 0.9g / cm 3 Suspended carrier, the filling ratio is 60%, keep the operating c...

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Abstract

The invention discloses a method for culturing a denitrification and dephosphorization function enhanced suspended carrier for IFAS / MBBR process, which comprises the following steps: injecting a phosphorus -accumulating bacteria enrichment liquid into activated sludge, and operating for 3-7 days in an anaerobic / aerobic mode; after the preliminary enrichment is completed, adding a suspended carrier into a reactor, and carrying out a biofilm formation reaction until the enriched activated sludge in the reactor is emptied; after the activated sludge is emptied, changing the operation mode into anaerobic / sedimentation water changing / anoxic operation, stopping injecting the phosphorus -accumulating bacteria enrichment liquid, changing into injecting denitrification and dephosphorization A liquid, and emptying the denitrification and dephosphorization A liquid and injecting denitrification and dephosphorization B liquid in the sedimentation water changing stage; and after the denitrification and dephosphorization liquid B is completely utilized by the suspended carrier, stopping injecting the denitrification and dephosphorization liquid A and the denitrification and dephosphorization liquid B, injecting the denitrification and dephosphorization liquid C, changing the operation mode into anaerobic / anoxic operation, and operating for 5-10 days. The problems that in the prior art, suspended filler is long in biofilm culturing time, poor in biofilm culturing effect within a short time and the like are solved, denitrification and dephosphorization functions of a sewage treatment plant are enhanced, and ecological health of water is guaranteed.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for cultivating a suspension carrier with enhanced denitrification and dephosphorization functions used in IFAS / MBBR processes. Background technique [0002] Human beings have reached a consensus on the root cause of water eutrophication, that is, excessive discharge of nutrients such as nitrogen and phosphorus is the most critical factor. The sewage treatment plant is an important place to ensure the quality of the water environment and its functional objectives. In order to ensure the ecological health of the water body, it is of great significance to improve the nitrogen and phosphorus treatment effect and capacity of the sewage treatment plant. [0003] The IFAS / MBBR process is one of the methods at home and abroad at this stage when faced with the need for enhanced treatment efficiency in traditional activated sludge sewage treatment plants. Its core is to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F3/30C02F3/34
CPCC02F3/006C02F3/308C02F3/305C02F3/34C02F3/301C02F2203/004C02F2305/06Y02W10/10
Inventor 陶文达高卫民孟溪
Owner 中冶生态环保集团有限公司