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Method for microorganism maintenance during BAF water stopping

A technology of microorganisms and biological aerated filters, applied in biological treatment devices, chemical instruments and methods, biological water/sewage treatment, etc., can solve problems such as failure to reach standards normally, huge environmental pollution damage, etc., to maintain normal growth and metabolism, The effect of avoiding inhibition and reducing energy consumption

Active Publication Date: 2020-02-21
AWS ENVIRONMENT TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During this period, water cannot be produced normally up to the standard, causing huge damage to environmental pollution

Method used

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  • Method for microorganism maintenance during BAF water stopping
  • Method for microorganism maintenance during BAF water stopping
  • Method for microorganism maintenance during BAF water stopping

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A kind of BAF water cut off microbial maintenance method, comprises the following steps:

[0042] 1) Filling: The microorganisms of the biological aerated filter are upward-flowing biological aerated filters, and the bottom is connected with the water inlet and the upper part of the inlet water distribution pipe, and pebbles with a height of 0.2 meters and a particle size of 15-20mm are laid as a supporting layer ; The upper part of the supporting layer is filled with 4.5 meters of activated zeolite as a packing layer for nitrifying bacteria. A clear water area is set between the packing layer and the upper water outlet of the biological aerated filter, and the height of the clear water area is 0.5m. Among them, the particle size of the activated zeolite is 3-5mm, the porosity is 65%, and the specific surface area is 120m 2 / g; SiO 2 / Al 2 o 3 Less than 4.5, the cation exchange capacity is 250mmol / g.

[0043] 2) supplement nutrients and trace elements: add nutrient...

Embodiment 2

[0049] A kind of BAF water cut off microbial maintenance method, comprises the following steps:

[0050] 1) Filling: The microorganisms of the biological aerated filter are upward-flowing biological aerated filters, and the bottom is connected with the water inlet and the upper part of the inlet water distribution pipe, and pebbles with a height of 0.2 meters and a particle size of 15-20mm are laid as a supporting layer ; The upper part of the supporting layer is filled with 5.0 meters of activated zeolite as a packing layer for nitrifying bacteria. A clear water area is provided between the packing layer and the upper water outlet of the biological aerated filter, and the height of the clear water area is 1m. Among them, the particle size of the activated zeolite is 3-5mm, the porosity is 75%, and the specific surface area is 160m 2 / g; SiO 2 / Al 2 o 3 is 4.2, and the cation exchange capacity is 300mmol / g.

[0051] 2) supplement nutrients and trace elements: add nutrient...

Embodiment 3

[0057] A kind of BAF water cut off microbial maintenance method, comprises the following steps:

[0058] 1) Filling: The microorganisms of the biological aerated filter are upward-flowing biological aerated filters, and the bottom is connected with the water inlet and the upper part of the inlet water distribution pipe, and pebbles with a height of 0.2 meters and a particle size of 15-20mm are laid as a supporting layer ; The upper part of the supporting layer is filled with 4.5 meters of activated zeolite as a packing layer for nitrifying bacteria. A clear water area is set between the packing layer and the upper water outlet of the biological aerated filter, and the height of the clear water area is 0.6m. Among them, the particle size of the activated zeolite is 3-5mm, the porosity is 75%, and the specific surface area is 200m 2 / g; SiO 2 / Al 2 o 3 is 4.0, and the cation exchange capacity is 400mmol / g.

[0059] 2) supplement nutrients and trace elements: add nutrients a...

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Abstract

The invention discloses a method for microorganism maintenance during BAF water stopping. The method comprises enriching and cultivating nitrifying bacteria by using nutrients and trace elements. During the time of nitrifying BAF water stopping, by changing dissolved oxygen concentration, PH, ammonia nitrogen concentration and carbon source supplementing and other parameters, the circulation of anitrosation reaction, a nitrification reaction and a denitrification reaction can be performed, the normal growth and metabolism of nitrosating bacteria and nitrifying bacteria can be effectively maintained, and the number of stored bacteria is not reduced, so that ammonia nitrogen of outlet water can immediately reach the standard when water inlet of a BAF pool is restored.

Description

technical field [0001] The invention relates to a biological aerated filter water treatment technology in water treatment, in particular to a BAF water cut off microbial maintenance method. Background technique [0002] According to survey statistics, ammonia nitrogen has become the primary indicator affecting surface water quality and included in the binding control indicators of major water pollution discharges in the country. Biological aerated filter for urban sewage, referred to as BAF, is a water treatment device that integrates sewage biological oxidation treatment and deep filtration. It is mainly used for advanced treatment of low-concentration sewage and pretreatment of slightly polluted source water, such as urban domestic sewage. and advanced treatment of low-concentration industrial sewage, source water pretreatment of water supply, etc. As an effective sewage treatment process, the biological aerated filter has been valued for its good water discharge effect, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F3/30
CPCC02F3/34C02F3/302C02F2203/006C02F2305/06C02F2209/22C02F2209/06C02F2209/14
Inventor 赵皓翰倪康祥
Owner AWS ENVIRONMENT TECH LTD
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