Autotrophic denitrification advanced denitrification device and autotrophic advanced denitrification method

A technology of autotrophic denitrification and deep denitrification, applied in the field of autotrophic denitrification deep denitrification devices, can solve the problems of backwashing, bed thickness, sulfur loss, etc., and achieve the effect of ensuring stable operation

Inactive Publication Date: 2018-08-31
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, it adopts the form of fixed bed, which has good treatment effect, low energy consumption, and the removal load can reach 1kg / m 3 / d, but there are the following problems: (1) the bed is thicker and the resistance is large; (2) the content of suspended solids in the effluent is high, resulting in sulfur loss; (3) backwashing is required, and the active sites of the reaction are less
[0005] Patent 201610204784.9 discloses a material for removing nitrate in water by autotrophic microbial denitrification, but the cost is increased, and the problem of large bed resistance has not been solved
[0006] Patent 201410012307.3 discloses a method for removing nitrate nitrogen in water, in which stirring is used to make autotrophic denitrification sludge and sulfur particles fluidized under anaerobic conditions, and sulfur autotrophic denitrification is fully carried out to remove nitrate; at the same time The membrane separation module is integrated into the anaerobic fluidized bed, the microorganisms in the reactor are intercepted to increase the biomass in the reactor, and the solid-liquid separation is realized, which effectively avoids microbial contamination of the effluent, but this method consumes a lot of energy and causes serious membrane fouling ,high cost

Method used

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  • Autotrophic denitrification advanced denitrification device and autotrophic advanced denitrification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] The autotrophic deep denitrification method provided in this example is as figure 1 The autotrophic denitrification deep denitrification device shown is carried out. In a volume of 11.58m 3 The autotrophic bioreactor is filled from bottom to top with sulfur particles with a height of 1.2m and a particle size of 3-5mm and a height of 0.12m with a particle size of 5-20mm. The filling of sulfur fillers and suspended fillers The height ratio is 10:1. The autotrophic bioreactor was inoculated with sludge containing autotrophic denitrifying bacteria as seed sludge. Pass the nitrate-containing wastewater from the bottom of the autotrophic bioreactor into the domesticated reactor through the water injection pump and the water inlet pipe, and increase the nitrate nitrogen load in the influent water from 0 to 0.2kg-N / m at a uniform speed within 7 days 3 / d, to achieve film formation on the filler. After the completion of the film formation on the filler, the thickness of the b...

Embodiment 2

[0066] The autotrophic deep denitrification method provided in this example is as figure 1 The autotrophic denitrification deep denitrification device shown is carried out. In a volume of 11.58m 3 Fill the autotrophic bioreactor with sulfur particles with a particle size of 3-5mm at a height of 1.5m and suspended filler particles with a particle size of 5-20mm at a height of 0.15m from bottom to top, and the filling of sulfur fillers and suspended fillers The height ratio is 10:1. The autotrophic bioreactor was inoculated with sludge containing autotrophic denitrifying bacteria as seed sludge. Pass the nitrate-containing wastewater from the bottom of the autotrophic bioreactor into the domesticated reactor through the water injection pump and the water inlet pipe, and increase the nitrate nitrogen load in the influent water from 0 to 0.2kg-N / m at a uniform speed within 7 days 3 / d, to achieve film formation on the filler. After the completion of the film formation on the fi...

Embodiment 3

[0068] The autotrophic deep denitrification method provided in this example is as figure 1 The autotrophic denitrification deep denitrification device shown is carried out. In a volume of 11.58m 3 Fill the autotrophic bioreactor with sulfur particles with a particle size of 3-5mm at a height of 1.8m and suspended filler particles with a particle size of 5-20mm at a height of 0.225m from bottom to top, and the filling of sulfur fillers and suspended fillers The height ratio is 8:1. The autotrophic bioreactor was inoculated with sludge containing autotrophic denitrifying bacteria as seed sludge. Pass the nitrate-containing wastewater from the bottom of the autotrophic bioreactor into the domesticated reactor through the water injection pump and the water inlet pipe, and increase the nitrate nitrogen load in the influent water from 0 to 0.2kg-N / m at a uniform speed within 7 days 3 / d, to achieve film formation on the filler. After the completion of the film formation on the fi...

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Abstract

The invention relates to an autotrophic denitrification advanced denitrification device. The device comprises an autotroph reactor, a water distribution pipe, a water inlet pipe and a backwashing water inlet pipe which are arranged at the lower part of the reactor, and a water outlet pipe arranged at the upper part of the reactor, wherein the interior of the autotroph reactor sequentially comprises a water distribution layer and a composite filler layer formed by a sulfur filler layer and a suspension filler layer along a water flow direction. The invention also relates to an autotrophic advanced denitrification method. The method makes a treatment bed layer in an expanded state through controlling a water inlet flow rate, reduces bed layer resistance, makes reaction sites increased, and improves denitrification efficiency.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to an autotrophic denitrification deep denitrification device and an autotrophic deep denitrification method. Background technique [0002] At present, the demand for deep denitrification of sewage is from 15mg / L to lower, and the technologies include physical treatment technology, chemical treatment technology and biological treatment technology. Biological treatment technology refers to the process of using the denitrification of microorganisms to finally reduce the nitrate in water to nitrogen. Biological treatment has the characteristics of high efficiency and low consumption, and has attracted extensive attention from scholars. [0003] According to the different carbon sources required by bacteria, biological denitrification is divided into heterotrophic denitrification and autotrophic denitrification. Among them, autotrophic denitrification only needs ino...

Claims

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Application Information

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IPC IPC(8): C02F3/28C02F101/16
CPCC02F3/28C02F2101/163
Inventor 梁鹏郝雯曹效鑫黄霞张潇源邱勇
Owner TSINGHUA UNIV
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