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Sewage treatment device system and method thereof

A sewage treatment and sewage technology, which is applied in biological water/sewage treatment, water/sludge/sewage treatment, water treatment parameter control, etc. It can solve the problems of limited autotrophic nitrification, excessive total nitrogen in effluent, and nutrient competition. , to achieve the effect of convenient industrial application, easy operation, and avoidance of total nitrogen exceeding the standard

Pending Publication Date: 2020-06-16
LESHAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to: aim at the mixing of nitrifying bacteria and denitrifying bacteria existing in the biological denitrification sewage treatment process in the prior art, causing nutrient competition, which will cause the autotrophic nitrification process to be limited; or the carbon source is useless Cause waste and lead to the technical problem of total nitrogen exceeding the standard in the effluent

Method used

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  • Sewage treatment device system and method thereof
  • Sewage treatment device system and method thereof
  • Sewage treatment device system and method thereof

Examples

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Effect test

Embodiment 1

[0069] This embodiment provides a device system for sewage treatment, such as figure 1 As shown, it includes a first reaction tank 1, a second reaction tank 2 and a reclaimed water storage tank 3;

[0070] The first reaction tank 1 is provided with a first water inlet 4, a second water inlet 5, a first water outlet 6, and a second water outlet 7; the first aerator 8, Stirrer 9;

[0071] The second reaction tank 2 is provided with a third water inlet 10 and a third water outlet 11; the second reaction tank 2 is provided with a second aerator 12;

[0072] The reclaimed water storage tank 3 is provided with a fourth water inlet 13; the reclaimed water storage tank 3 is provided with a submersible pump 14;

[0073] The second water outlet 7 is connected to the third water inlet 10 through a pipe body provided with a valve 16, and the third water outlet 11 is connected to the fourth water inlet 13 through a pipe body provided with a valve 16, The submersible pump 14 is connected...

Embodiment 2

[0079] Take the activated sludge with stable denitrification effect from urban sewage treatment plants and inoculate it in the simulated SBR reactor, so that the MLSS is 3500mg / L. Use aerobic denitrification medium for culture, turn on the aerator, control the DO to 6mg / L, and the temperature at 25°C. Operation cycle: water inflow for 30 minutes, aeration for 4 hours, standing for 1 hour, and 70% water outlet. Run 20 cycles according to the above cycle to obtain activated sludge containing aerobic denitrifying bacteria with stable aerobic denitrification effect, such as figure 2 It was shown that the aerobic denitrifying bacteria group can remove nitrate nitrogen at a rate of more than 20 mg / L·h under the condition of sufficient carbon source.

[0080] Aerobic denitrification medium: sodium acetate 4g / L, potassium nitrate 0.35g / L, compound potassium salt (potassium dihydrogen phosphate: dipotassium hydrogen phosphate=1:1) 0.2g / L, magnesium sulfate heptahydrate 0.1g / L L, tra...

Embodiment 3

[0082] Take the activated sludge with stable denitrification effect from urban sewage treatment plants and inoculate it in the simulated SBR reactor so that the MLSS is 5000mg / L. The autotrophic nitrification medium was used for culture, the aerator was turned on, the DO was controlled at 4 mg / L, and the temperature was 25°C. Operation cycle: water inflow for 30 minutes, aeration for 6 hours, standing for 1 hour, and 70% water discharge. Run 30 cycles according to the above cycle to obtain the nitrifying bacteria activated sludge with stable autotrophic nitrification effect, such as image 3 It was shown that the ammonia nitrogen removal rate of the autotrophic nitrifying bacteria group can reach more than 8 mg / L·h under aerobic conditions.

[0083] Autotrophic nitrification medium: ammonium sulfate 0.4g / L, sodium bicarbonate 1.0g / L, compound potassium salt (potassium dihydrogen phosphate: dipotassium hydrogen phosphate=1:1) 0.15g / L, magnesium sulfate heptahydrate 0.1g / L, t...

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Abstract

The invention relates to a sewage treatment device system and a method thereof. The device system comprises a first reaction tank, a second reaction tank and a reclaimed water storage tank, wherein the first reaction tank is filled with activated sludge containing aerobic denitrifying bacterium flora and is used for carrying out aerobic denitrification reaction of nitrate nitrogen on organic matters in the sewage; the second reaction tank is filled with activated sludge containing autotrophic nitrifying bacterium flora and is used for autotrophic nitrification of ammonia nitrogen in the sewage. The principle that the adsorption and absorption rate of activated sludge to organic matters is far higher than that of activated sludge to ammonia nitrogen is utilized, and the heterotrophic aerobic denitrification sludge is adopted to quickly adsorb the organic matters in inlet water, so that the aim of separating the organic matters from the ammonia nitrogen is fulfilled. According to the method, the active sludge containing the aerobic denitrifying bacterium flora can fully utilize organic matters in the sewage to perform aerobic denitrification, and meanwhile, the active sludge containing the autotrophic nitrification bacterium flora can be ensured to fully perform nitrification under the condition of low organic matter load.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a sewage treatment device system and method thereof. Background technique [0002] At present, in the sewage treatment process adopted by my country's sewage treatment plants (stations), the biological denitrification is almost all based on the traditional autotrophic aerobic nitrification-heterotrophic anoxic denitrification method, but the nitrifying bacteria and denitrification in the existing process Bacteria are mixed together, resulting in nutrient competition between heterotrophic bacteria and autotrophic nitrifying bacteria, which will limit the autotrophic nitrification process. [0003] Using heterotrophic nitrification-aerobic denitrification bacteria to treat sewage is a new denitrification method. This method can simultaneously carry out nitrification and denitrification under aerobic and heterotrophic conditions. During the treatment process, ammonia nitroge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F3/30C02F101/16C02F101/30
CPCC02F3/34C02F3/302C02F2101/30C02F2101/163C02F2305/06C02F2209/16C02F2101/166
Inventor 陈茂霞江滔常佳丽靳如波苏泽模罗文海
Owner LESHAN NORMAL UNIV
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