Autotrophic denitrification artificial pond, construction method and method for denitrifying sewage by utilizing artificial pond

A technology of autotrophic denitrification and construction method, which is applied in the field of removal of nitrate nitrogen and ammonia nitrogen in water quality, and can solve the problem that the treatment effect is not very ideal

Inactive Publication Date: 2020-09-29
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] According to research, the removal rate of total nitrogen (TN) in sewage by

Method used

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  • Autotrophic denitrification artificial pond, construction method and method for denitrifying sewage by utilizing artificial pond
  • Autotrophic denitrification artificial pond, construction method and method for denitrifying sewage by utilizing artificial pond
  • Autotrophic denitrification artificial pond, construction method and method for denitrifying sewage by utilizing artificial pond

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0110] 1. Excavation of artificial pond bed

[0111] In the sewage area to be treated, excavate a cuboid artificial pond bed. The depth of the artificial pond bed is usually figure 1 The side wall of the partition near the length direction of the artificial pond is evenly arranged with a plurality of diversion holes 4 along the depth direction of the artificial pond from top to bottom to form a diversion area; the diversion areas on the adjacent two partitions are respectively The side walls close to the different length directions of the artificial pond make the water flow into the artificial pond flow in an S shape, and the ratio of the width of the diversion area to the width of the partition is 20-60:100, preferably 30-35:100, further Preferably it is 35:100.

[0112] 2. Prepare filler

[0113] 2A) Mix sulfur, limestone, zeolite, and volcanic rock with a particle size of 10-20mm; 20-25mm; 10-15mm; 25-28mm evenly, and prepare the filler in the sulfur filler area, that is, ...

Embodiment 2

[0130] Taking the tail water of a sewage treatment plant in Changge City as an example for deep denitrification treatment, the volume and quality of sewage are shown in Table 1.

[0131] 1. Excavation of artificial pond bed

[0132] In the sewage area to be treated, excavate a cuboid artificial pond bed body, the length, width and depth of the artificial pond bed body are 3m, 1m, and 1.1m respectively, and the effective depth is 1m (that is, the depth of the water in the artificial pond, the bottom of the artificial pond The height to the water surface; usually figure 1 The dividing plate is evenly arranged with a plurality of diversion holes 4 from top to bottom along the depth direction of the artificial pond near the side wall of the length direction of the artificial pond to form a diversion area, and the ratio of the width of the diversion area to the width of the dividing plate The ratio is 35:100 (usually 20-60:100); the diversion areas on two adjacent partitions are re...

Embodiment 3

[0154] Except step 2) middle sulfur, the volume ratio of limestone, zeolite, volcanic rock is 1:0.8:1.2:0.7; The ratio of the height of sulfur filling area and the effective height of artificial pond is 35:100;

[0155] In step 3), the ratio of the area of ​​the ecological floating island to the water surface of the artificial pond is 40:100; the ratio of the underwater depth of the suspended biological carrier filler to the effective depth of the artificial pond is 20:100 (usually 10-50:100 , preferably 20-40:100); the ratio of the volume of the biological carrier filler suspended under the water surface of the ecological floating island to the effective total volume of the artificial pond is 12:100; the planting density of emergent plants is 10 plants / m 2 Except that, the rest are the same as in Example 2.

[0156] See Table 1 for the measurement results of the effluent quality (COD, nitrate, ammonia nitrogen, total nitrogen) of the tail water of the sewage plant after the d...

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Abstract

The invention discloses an artificial pond, a construction method and a method for deep denitrification of sewage by using the artificial pond, and belongs to the field of innovation of environmentalengineering water treatment processes and theories. An artificial pond bed body is excavated in a sewage land to be treated, and filler blocks comprising sulfur, limestone, zeolite and volcanic rock are laid in a sulfur filler area at the bottom; an ecological floating island floating in water is arranged in the water body of the artificial pond, plants are planted on the part above the water surface, and a biological carrier filler is suspended on the part below the water surface. To-be-treated sewage is introduced into the artificial pond, and a bio-film culturing treatment is performed until the effluent quality is stable and the total nitrogen removal rate reaches 75% or above. A nitrification and de-nitrification treatment is carried out on ammonia nitrogen in the sewage by the artificial pond to realize deep nitrogen removal; the filler in the artificial pond is detachable, the artificial pond is convenient to construct and disassemble; the turbidity of the effluent treated by the method is obviously reduced, the manufacturing cost is low, the nitrogen removal efficiency is high, and the removal rates of ammonia nitrogen, total nitrogen and nitrate nitrogen all reach 80% or above.

Description

technical field [0001] The invention relates to the deep removal of nitrogen in the tail water of a sewage plant, belongs to the application field of sewage advanced treatment technology, and especially relates to the treatment of nitrate nitrogen (NO 3 -N) and ammonia nitrogen (NH 4 -N) removal. Specifically, the system is divided into an aerobic nitrification zone and a facultative anaerobic autotrophic denitrification zone. The aerobic zone mainly converts ammonia nitrogen into nitrate nitrogen through microbial nitrification; the facultative anaerobic zone mainly uses sulfur as an electron donor. , nitrate nitrogen (NO 3 -N) and nitrite nitrogen (NO 2 -N) as an electron acceptor for deep denitrification of sewage plant tail water by sulfur autotrophic denitrifying bacteria. [0002] Background of the invention [0003] Nitrogen and phosphorus elements are important water quality indicators of surface water discharged into lakes and rivers from the tail water of sewage...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F3/32C02F101/16
CPCC02F3/302C02F3/32C02F2101/16
Inventor 王洪杰李莹莹宋孟李棒
Owner BEIJING FORESTRY UNIVERSITY
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