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Sulfur-based autotrophic denitrification based modular sewage nitrogen and phosphorus removing technology

A technology for nitrogen and phosphorus removal and treatment process, which is applied in special compound water treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc. Phosphorus capacity waste, difficult engineering and other issues

Active Publication Date: 2018-08-24
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the large difference in the concentration of nitrogen and phosphorus in the actual sewage and the characteristics of frequent changes, the above two patents cannot remove nitrogen and phosphorus in an appropriate proportion, resulting in a large waste of process nitrogen or phosphorus removal capacity
For example, the ratio of nitrogen and phosphorus in the secondary effluent of most sewage plants is above 10. According to the treatment schemes of the above two patents, in order to achieve the effective removal of nitrogen, the set hydraulic retention time (HRT) will far exceed the required effective removal of phosphorus. HRT, resulting in large volume of reactor, high investment cost, difficult to engineer

Method used

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  • Sulfur-based autotrophic denitrification based modular sewage nitrogen and phosphorus removing technology
  • Sulfur-based autotrophic denitrification based modular sewage nitrogen and phosphorus removing technology
  • Sulfur-based autotrophic denitrification based modular sewage nitrogen and phosphorus removing technology

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Experimental program
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Effect test

Embodiment 1

[0048] Such as figure 1 As shown, two modules are used, which are divided into two reactors, the first one is filled with 3L pyrite with an average particle size of 3mm, and the porosity is 45%, and the second one is filled with 2L of sulfur with an average particle size of 3mm plus average particle size Limestone with a diameter of 4mm, a volume ratio of 3:1, and a porosity of 41%. The incoming water passes through the pyrite module first, and then the sulfur module. The total hydraulic retention time is adjusted to 2.4h. figure 1 It is the concentration of nitrogen and phosphorus in the influent and effluent water after 30 days of operation. Depend on figure 1 It can be seen that the average nitrate nitrogen in the influent water is 9.98mg / L, the average phosphate phosphorus in the influent water is 1.05mg / L, the average nitrate nitrogen in the effluent water obtained by using this kind of treatment module is 0.01mg / L, and the average phosphate phosphorus in the effluent w...

Embodiment 2

[0050] Such as figure 2 As shown, two modules are used, and they are divided into two reactors. The first one is filled with 2L of sulfur with an average particle size of 2.5mm plus limestone with an average particle size of 3mm, the volume ratio is 2:1, and the porosity is 43%. Fill 2L of pyrite with an average particle size of 2mm and calcite of 3mm, the volume ratio is 6:1, and the porosity is 40%. The incoming water passes through the sulfur module first, and then the pyrite module, and the total hydraulic retention time is adjusted to 3.1h. figure 2 It is the concentration of nitrogen and phosphorus in the influent and effluent of operation 66d. Depend on figure 2 It can be seen that the average nitrate nitrogen in the influent water is 15.16mg / L, the average phosphate phosphorus in the influent water is 1.24mg / L, and the average nitrate nitrogen in the effluent water obtained by using this treatment module is 0.01mg / L, and the average phosphate phosphorus in the eff...

Embodiment 3

[0052] Such as image 3 As shown, three modules are used, packed in one reactor. The bottom layer is filled with 2L of sulfur with an average particle size of 3mm and calcite with an average particle size of 3.5mm, the volume ratio is 1:1, and the porosity is 42%. The second layer is filled with 1L of pyrite with an average particle size of 2mm, and the porosity is 47%. Three layers are filled with 1L of sulfur with an average particle size of 4mm and a porosity of 50%. Influent water flows through the three modules from bottom to top, and the total hydraulic retention time is adjusted to 3.7h. image 3 It is the concentration of nitrogen and phosphorus in the influent and effluent of the operation 80d. Depend on image 3 It can be seen that the average nitrate nitrogen in the influent water is 26.87mg / L, the average phosphate phosphorus in the influent water is 2.20mg / L, the average nitrate nitrogen in the effluent water obtained by using this kind of treatment module is 0...

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Abstract

The invention discloses a sulfur-based autotrophic denitrification based modular sewage nitrogen and phosphorus removing technology, and belongs to the technical field of sewage treatment. The technology is characterized in that iron pyrite, sulphur and carbonate minerals are used as fillers; sulfur-based autotrophic denitrification is carried out; an iron pyrite treating module and a sulphur treating module are correspondingly built and combined in a plurality of means to treat nitrogen and phosphorus in sewage. According to the technology, the modules can be flexibly combined to treat the sewage with different quality; and the technology has the advantages of being low in cost, flexible to debug, and high in applicability, and is suitable for engineering application.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and relates to a modular sewage denitrification and phosphorus removal treatment process based on sulfur autotrophic denitrification, more specifically, relates to a process in which a pyrite treatment module and a sulfur treatment module are combined in various ways , A method for treating nitrogen and phosphorus in sewage. Background technique [0002] With the rapid development of my country's economy and the acceleration of urbanization, water pollution is becoming more and more serious. In order to control water pollution, the state has invested heavily in the construction of sewage treatment facilities. [0003] At present, sewage treatment methods can be roughly divided into three types: physical method, biological method and chemical method, among which the relative cost of biological method is the lowest and the most widely used. With the continuous deepening of research on tr...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F3/28C02F101/16C02F101/10
CPCC02F3/28C02F3/34C02F2305/06C02F2101/105C02F2101/16
Inventor 李睿华葛志斌王卫罗黎煜关梦莎张永威李甫昌代自玉
Owner NANJING UNIV
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