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Method for rapidly starting denitrification function of sewage treatment system

A sewage treatment system and quick start-up technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, water treatment parameter control, etc. Operating costs and other issues, to achieve the effect of quick recovery of activity, reducing the amount of bacterial agents, and reducing start-up costs

Active Publication Date: 2022-07-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent is mainly achieved by adding enrichment culture nitrifying bacteria and liquid bacterial agent. The activity of liquid bacterial agent is relatively high, and it is easy to quickly perform denitrification function after adding, but the storage time of liquid bacterial agent at room temperature is not long enough.
[0005] Dry powder bacterial agent meets the characteristics of long-term storage and convenient transportation, but it often undergoes specific dormant treatment, which leads to the fact that it will affect the use effect if it is directly added to the sewage treatment plant during the application process because it cannot quickly form bacterial micelles. If it is activated Waiting for treatment will increase the treatment process, especially in the start-up stage, which will cause waste of bacterial agents and increase operating costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) The nitrifying bacteria suspension was subjected to gravity sedimentation and the supernatant was discarded to obtain the first concentrated solution of nitrifying bacteria with a water content of 85%, and then a sodium alginate solution with a mass fraction of 0.1% was added. The mass ratio of a concentrated solution is 1:1000, and the air is aerated for 8h. Dewatered to a water content of 60% by filtration to prepare a second concentrated solution of nitrifying bacteria, and then added trehalose ester, the amount of which accounted for 0.1% of the mass of the second concentrated solution of nitrifying bacteria, and nitrogen was purged during the mixing process for 60min. The obtained mixture was then centrifuged and dehydrated to a moisture content of 30% to prepare a third concentrated solution of nitrifying bacteria, and vacuum-dried under the conditions of a pressure of 1 kPa and a temperature of 40° C. to obtain a nitrifying bacteria dry powder inoculum, which ...

Embodiment 2

[0031] (1) The nitrifying bacteria suspension was subjected to gravity sedimentation and the supernatant was discarded to obtain the first concentrated solution of nitrifying bacteria with a water content of 90%, and then a sodium alginate solution with a mass fraction of 0.5% was added. The mass ratio of a concentrated solution is 1:5000, and the air is aerated for 16h. Dewatered to a water content of 70% by filtration to prepare a second concentrated solution of nitrifying bacteria, and then added rhamnose ester in an amount that accounted for 0.5% of the mass of the second concentrated solution of nitrifying bacteria. During the mixing process, nitrogen was purged for 120 minutes. The obtained mixture was then centrifuged and dehydrated to a moisture content of 40% to prepare the third concentrated solution of nitrifying bacteria, and vacuum-dried under the conditions of a pressure of 1.5 kPa and a temperature of 45° C. to obtain a dry powder of nitrifying bacteria, which wa...

Embodiment 3

[0035] (1) The nitrifying bacteria suspension was subjected to gravity sedimentation and the supernatant was discarded to obtain the first concentrated solution of nitrifying bacteria with a water content of 90%, and then a sodium alginate solution with a mass fraction of 0.5% was added. The mass ratio of a concentrated solution is 1:5000, and the air is aerated for 16h. Dewatered to 80% water content by filtration to prepare the second concentrated solution of nitrifying bacteria, and then added sucrose ester, the amount of which accounted for 1% of the mass of the second concentrated solution of nitrifying bacteria, and nitrogen was purged for 180 minutes during the mixing process. The obtained mixture was then centrifuged and dehydrated to a moisture content of 50% to prepare a third concentrated solution of nitrifying bacteria, and vacuum-dried under the conditions of a pressure of 2 kPa and a temperature of 55° C. to obtain a dry powder of nitrifying bacteria, which was st...

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Abstract

The invention relates to a method for quickly starting a denitrification function of a sewage treatment system. The method comprises the following steps: firstly, dehydrating and concentrating a nitrifying bacteria suspension for three times, and respectively adding sodium alginate, sugar ester substances and the like to prepare a dry powder fungicide; the sludge concentration in the sewage treatment system is regulated and controlled, disintegration treatment is carried out until extracellular polymeric substances in the system are increased to be smaller than or equal to 65% according to the protein content, and then the sewage treatment system is started by adding the dry powder microbial inoculum. According to the method, the activated sludge system is pretreated and is cooperatively started in combination with the dry powder microbial inoculum, so that rapid formation of zoogloea with a denitrification function is facilitated, rapid construction of the denitrification function of the system is realized, and waste of the microbial inoculum is avoided.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a method for quickly starting the denitrification function of a sewage treatment system. Background technique [0002] Most of the existing biological sewage treatment systems focus on the removal of organic pollutants, and the functional microorganisms responsible for removing nitrogen-containing pollutants need to be strengthened to achieve the denitrification function, especially the activation of the denitrification function of the system generally takes up to several months. time. During the start-up process, a rapid start-up can be achieved by adding biological inoculants. Biological inoculum includes liquid and solid, and its preservation method also includes liquid and solid. In comparison, dry powder inoculum is more convenient for preservation and long-distance transportation. However, the direct addition of dry powder inoculants into the treatment system c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34
CPCC02F3/34C02F2305/06C02F2209/14C02F2209/22Y02W10/10
Inventor 高会杰孙丹凤王刚陈明翔
Owner CHINA PETROLEUM & CHEM CORP
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