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Device based on elemental sulfur autotrophic denitrification process and wastewater treatment method

A technology of autotrophic denitrification and sulfur element, which is applied in special compound water treatment, polluted groundwater/leachate treatment, anaerobic digestion treatment, etc. Low abundance of oxidizing bacteria and other problems, to achieve the effects of stable properties, low power consumption, and low operating costs

Inactive Publication Date: 2020-05-26
SUN YAT SEN UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese patent 201910434299.4, titled "Anammox coupled sulfur autotrophic denitrification device and wastewater treatment method" provides an anammox coupled sulfur autotrophic denitrification device, which solves the problem of anaerobic ammonium oxidation itself Denitrification and reduction of sulfate concentration in effluent after coupled sulfur autotrophic denitrification
However, the abundance of sulfur-oxidizing bacteria in the activated sludge of sewage treatment plants is low. The activated sludge does not use sulfur as an electron donor to domesticate and enrich sulfur-oxidizing bacteria. There are few obligate functional microorganisms, so the efficiency of microbial nitrogen removal is low. At the same time, the soaking time of sulfur particles in activated sludge is shorter, and the microbial biomass on the formed biofilm is less

Method used

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  • Device based on elemental sulfur autotrophic denitrification process and wastewater treatment method
  • Device based on elemental sulfur autotrophic denitrification process and wastewater treatment method
  • Device based on elemental sulfur autotrophic denitrification process and wastewater treatment method

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Effect test

Embodiment 1

[0050] like figure 1 and figure 2 As shown, a device based on the sulfur elemental autotrophic denitrification process includes a sequentially connected water inlet system, a sulfur packed bed 5, a side overflow tank 6 and a sludge settling area 7; the water inlet system includes a water inlet valve 13. Water inlet barrel 1, water inlet pump 2, water inlet pipe 3 and water inlet 31, the first screen 41 is set on the sulfur packed bed 5 to support the sulfur sheets, and the second screen 42 is set on the sulfur packed bed 5 for By intercepting the sulfur flakes, the effluent from the sulfur packed bed 5 overflows to the first side overflow tank 61 and the second side overflow tank 63 and then overflows to the sludge settling area 7 behind the reactor, the first sawtooth weir 62 and The second sawtooth weir 64 is used to filter part of the suspended sludge. The sludge settling area 7 is provided with a second sludge discharge port 11 and an overflow water outlet 8. The water o...

Embodiment 2

[0066] In the embodiment of the present invention, before step S1, sludge domestication is carried out by continuously feeding artificially synthesized wastewater.

[0067] The sulfur flakes were washed, dried and weighed, and their density was calculated by the drainage method. The porosity of the sulfur packed bed is set to 50%, the sulfur flakes are put into the sulfur packed bed to make the occupied volume 3L, and the mass of the put sulfur flakes is 3L×sulfur density. The 3L sludge concentration is 5g / L (in terms of mixed liquid suspended solids) laboratory domesticated sulfur autotrophic denitrification sludge sludge water mixture with sulfide as the electron donor is evenly dosed into the reactor from the upper part of the reactor, The inoculation was repeated for 2 days, and the water was not used at this stage. The purpose was to increase the contact between the sludge and the sulfur sheet, and facilitate the microorganisms to form a film on the sulfur sheet.

[0068...

Embodiment 3

[0074] The structure of this embodiment is basically the same as that of Embodiment 1, the difference is that, as Figure 5 As shown, the reaction zone is divided into a first reaction zone and a second reaction zone, and the left and right zones have the same length, width and height, and are placed in parallel. The length, width and height of the first reaction zone and the second reaction zone are respectively set to 20cm, 20cm and 25cm, so the length, width and height of the reaction zone are 20cm, 40cm and 25cm. The left and right areas treat wastewater independently, increasing the amount of water treated per unit time and saving time for wastewater treatment. The length, width, and height of the sludge sedimentation area 7 are 15cm, 40cm, and 25cm respectively. Among them, the middle part of the rear facade of the sludge sedimentation area 7 has a mud discharge port at a height of 1 cm and an overflow outlet at 21 cm. The effective volume is 12.6L.

[0075] The first ...

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Abstract

The invention discloses a device based on an elemental sulfur autotrophic denitrification process. The device comprises a water inlet system, a reaction area, a sludge settling area and a water outletsystem which are sequentially connected, wherein a first side edge overflow groove is formed in the upper end of the reaction area; a second side overflow groove is formed in the upper end of the sludge settling area; the first side edge overflow groove is communicated with the second side edge overflow groove; the first side overflow groove is provided with a first sawtooth weir; the second sideoverflow groove is provided with a second sawtooth weir; the reaction area is provided with a sulfur packed bed; the sulfur packed bed comprises elemental sulfur and domesticated sludge; the bottom of the sulfur packed bed is provided with a first screen for supporting the elemental sulfur and the domesticated sludge; the reaction area is also provided with a first sludge discharge port; and thesludge settling area is provided with a second sludge discharge port. The invention further discloses a wastewater treatment method which is high in treatment efficiency and capable of realizing deepdenitrification of the landfill leachate.

Description

technical field [0001] The invention belongs to the technical field of deep denitrification of wastewater, and in particular relates to a device and a wastewater treatment method based on a sulfur elemental autotrophic denitrification process. Background technique [0002] As a new denitrification method with high efficiency and low consumption, the short-range nitrification-anammox technology can save 60% of the oxygen demand without adding additional carbon sources. ). However, ANAMMOX bacteria will 1mol NH 4 + -N and 1.32mol NO 2 - -N converts to N 2 At the same time, 0.26mol NO will be produced 3 - -N, generated NO 3 - -N accounts for about 11% of the total nitrogen in the influent. In addition, NH in the short-cut nitrification reaction 4 + -N excessive oxidation will further produce NO 3 - -N. These factors lead to effluent NO 3 - -The concentration of N is too high and the total nitrogen exceeds the standard. The nitrogen-containing wastewater used in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F103/06
CPCC02F3/28C02F2301/046C02F2103/06C02F2305/06
Inventor 吕慧曾楚筠刁兴兴孙连鹏赵晴宋乃巧
Owner SUN YAT SEN UNIV
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