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A method for removing total n from surface water source water by using broad-spectrum denitrifying bacteria to embed biologically active fillers

A technology of denitrifying bacteria and biological activity, applied in biological water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., to achieve stable water quality and solve the effect of low biodegradation performance

Active Publication Date: 2019-12-13
BEIJING UNIV OF TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0007] The use of broad-spectrum denitrifying bacteria solves the problem of bacterial adaptability caused by large temperature changes in surface water sources

Method used

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  • A method for removing total n from surface water source water by using broad-spectrum denitrifying bacteria to embed biologically active fillers
  • A method for removing total n from surface water source water by using broad-spectrum denitrifying bacteria to embed biologically active fillers

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Embodiment 1

[0022] (1) Enrichment of denitrifying bacteria, using nitrifying sludge from urban sewage treatment plants, remaining sludge hydrolyzate as carbon source, screening and enriching denitrifying bacteria to obtain a broad-spectrum denitrifying bacterial source; laboratory test: denitrification Bacterial concentration at 6000mg / L, 25°C, COD Cr Under the condition of / nitrate nitrogen ≈ 6, the denitrification efficiency can reach 300mg / (L·h).

[0023] (2) Filler production: The filler adopts a composite structure: mainly polymer materials such as polyethylene, polyvinyl chloride, polypropylene, ABS resin, etc., adding 8wt% polyvinyl alcohol (PVA) hydrophilic materials, through thread hot-melt or The plate is hot-pressed into holes to make a long sheet-shaped three-dimensional network structure carrier. The concentrated solution of broad-spectrum denitrifying bacteria enriched and cultivated in step (1) is mixed with polyvinyl alcohol solution, and calcium carbonate is added to prep...

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Abstract

The invention provides a method for removing water total N from a surface water source by means of embedding biological active filler in wide-spectrum denitrifying bacteria and belongs to the field of water treatment. The adopted denitrifying bacteria are screened out and separated from nitrified sludge in a urban sewage treatment plant, and a wide-spectrum maintaining method with hydrolysate of remaining sludge in the urban sewage treatment plant as denitrifying carbon source supply is adopted; the nitrogen removal capacity of the denitrifying bacteria obtained through enrichment culture is converted into the fact that the nitrogen removal capacity of a denitrifying mixed solution needs to reach 300 mg / L.h or above under the conditions that the concentration of the denitrifying bacteria is 6000 mg / L, the temperature is 25 DEG C, and CODCr / nitrate nitrogen is 4=7; bacterium embedding is conducted; the filler is placed in water with one end fixed to a base and the other end in a free state; and the surrounding area of a water intake opening is used as a feeding area, the C / N ratio in the filler feeding area is kept being 4 or above. By the adoption of the method for removing the water total N from the surface water source by means of embedding the biological active filler in the wide-spectrum denitrifying bacteria, the water quality is stable in a water intake area, the water intake area does not need to be replaced within several years, and the method is not influenced by temperature.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a technical method for removing total N in surface water source water by embedding biologically active fillers with broad-spectrum denitrifying bacteria. Background technique [0002] According to the traditional theory, the N pollution of surface water sources should be NH 4 + -N is the main form, but more investigations and research literature show that surface water source water (rivers, lakes, reservoirs) due to the reoxygenation of the surface of the water body, the low-intensity pollution of N is mostly NO 3 - The -N form exists. NO in surface water of the Hunhe River Basin 3 - -N concentration variation range is 0.62-23.47mg / L, the average concentration is 17.07mg / L, C / N=9.52; the concentration of nitrate nitrogen in the Lisangou water system in Dongying section of Shandong Province in the Yellow River Basin is 9-11mg / L, C / N N=5.56-7.27; Tianjin surface wat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28C02F101/16
CPCC02F3/2806C02F2101/16C02F2209/16
Inventor 杨宏孟婷
Owner BEIJING UNIV OF TECH
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