A method and device for quickly recovering nitrification capacity of sewage plant

A rapid recovery, sewage plant technology, applied in chemical instruments and methods, microorganism-based methods, biochemical equipment and methods, etc., can solve problems such as difficulty in ammonia nitrogen degradation, and achieve solutions to ammonia nitrogen degradation difficulties, simple device, no secondary The effect of pollution

Active Publication Date: 2022-05-10
SHANGHAI CHEM IND PARK SINO FRENCH WATERDEV
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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 ensure the nitrification capacity of the sewage treatment system, and provide a method and device for quickly restoring the nitrification capacity of the sewage plant. The nitrifying bacteria cultivated by the bio-enrichment optimization technology are supplemented to the biochemical treatment system as a source of nitrifying bacteria so as to ensure The nitrification capacity of the system can solve the problem of difficult degradation of ammonia nitrogen in the wastewater treatment system

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  • A method and device for quickly recovering nitrification capacity of sewage plant

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Embodiment 1

[0042] The present embodiment provides a method for quickly recovering the nitrification capacity of a sewage plant, said method comprising the following steps:

[0043] Inoculate nitrifying bacteria: add activated sludge containing nitrifying bacteria to the culture tank;

[0044] Cultivation of nitrifying bacteria: using SBR to cultivate the activated sludge, adding mixed chemicals to the inoculated culture tank, adjusting the growth conditions of the bacteria, and obtaining nitrifying bacteria sludge;

[0045] Wherein, in the cultivation of the nitrifying bacteria, the conditions for controlling the growth of the nitrifying bacteria are: the pH value of the activated sludge in the culture tank is 7.0 to 8.0, the dissolved oxygen value is 1.5 to 4.0 mg / L, and the alkalinity is 350 mg / L Above, the concentration of nitrite nitrogen is below 5mg / L, and the concentration of nitrate nitrogen is below 500mg / L;

[0046] Wastewater treatment: discharge the nitrifying bacteria sludg...

Embodiment 2

[0056] The present embodiment provides a method for quickly recovering the nitrification capacity of a sewage plant, said method comprising the following steps:

[0057] Inoculate nitrifying bacteria: add activated sludge containing nitrifying bacteria to the culture tank;

[0058] Cultivation of nitrifying bacteria: using SBR to cultivate the activated sludge, adding mixed chemicals to the inoculated culture tank, adjusting the growth conditions of the bacteria, and obtaining nitrifying bacteria sludge;

[0059] Wherein, in the cultivation of the nitrifying bacteria, the conditions for controlling the growth of the nitrifying bacteria are: the pH value of the activated sludge in the culture tank is 7.0 to 8.0, the dissolved oxygen value is 1.5 to 4.0 mg / L, and the alkalinity is 350 mg / L Above, the concentration of nitrite nitrogen is below 5mg / L, and the concentration of nitrate nitrogen is below 500mg / L;

[0060] Wastewater treatment: discharge the nitrifying bacteria sludg...

Embodiment 3

[0075] This embodiment provides a method for quickly recovering the nitrification capacity of the sewage plant, as follows:

[0076] (1) Build a pond body for cultivating nitrifying bacteria, the volume of the pond body is 1000m 3 .

[0077] (2) Add the existing normal aeration tank sludge of the sewage plant, or purchased activated sludge containing nitrifying bacteria or special strains to the tank body, so that the sludge concentration is at the maximum level when the nitrifying bacteria cultivation tank is at the maximum level , the sludge concentration MLSS is 2000mg / L. The nitrifying bacteria sludge was cultivated in SBR mode, and the cultivation period was 24 hours.

[0078] (3) Add industrial water to the tank body to the high level controller, and the volume of the sludge mixture is 1000m 3 .

[0079] (4) to 10m 3 Dosing NaHCO in the dosing tank 3 and NH 4 Cl, NaHCO 3 The dosage is 600Kg, NH 4 The dosage of Cl is 300Kg. Process industrial water to a volume o...

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Abstract

The invention discloses a method and a device for quickly recovering the nitrification capacity of a sewage plant. The method comprises the following steps: adding activated sludge containing nitrifying bacteria into a culture tank; Add mixed medicament in the final cultivation tank, adjust the growth condition of thalline, obtain nitrifying bacteria sludge; Wherein, in described nitrifying bacteria cultivation, the growth condition of controlling described nitrifying bacteria is: the pH of activated sludge in the cultivation pond The value of dissolved oxygen is 7.0-8.0, the dissolved oxygen value is 1.5-4.0mg / L, the alkalinity is above 350mg / L, the concentration of nitrite nitrogen is below 5mg / L, and the concentration of nitrate nitrogen is below 500mg / L; Wastewater treatment: put The nitrifying bacteria sludge is discharged into the wastewater treatment tank. The method of the invention solves the problem of difficult degradation of ammonia nitrogen in wastewater treatment, can quickly restore the nitrification capacity of the sewage plant, and ensures that the effluent quality of the sewage plant reaches the standard.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method and a device for quickly restoring the nitrification capacity of a sewage plant. Background technique [0002] Nitrifying bacteria play a pivotal role in wastewater biological treatment systems, because this species determines the system's ability to degrade ammonia nitrogen. However, nitrifying bacteria have strict requirements on the surrounding growth environment, and the growth and reproduction speed is slow. As a result, nitrification in biochemical systems often weakens or even disappears. Wastewater often contains toxic characteristic pollutants such as cyanide, aniline, phenol, etc. When these pollutants reach a certain concentration, the wastewater treatment system will lose its nitrification capacity. [0003] Therefore, there is an urgent need to provide a method and device for quickly restoring the nitrification capacity of sewage plants, and q...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/34C02F3/12C12N1/20C12R1/01
CPCC02F3/34C02F3/12C12N1/20C02F2203/004C02F2203/006C02F2305/06C02F2209/14Y02W10/10
Inventor 张利华周珉李俊虎王乔
Owner SHANGHAI CHEM IND PARK SINO FRENCH WATERDEV
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