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Method for treating high-concentration nitrate nitrogen in water

A nitrate nitrogen, high-concentration technology, applied in water treatment parameter control, special compound water treatment, biological water/sewage treatment, etc., can solve the problems of high alkalinity output and sludge output

Inactive Publication Date: 2021-07-02
陈余豪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Biological denitrification has always been considered to be the most economical and effective way of denitrification, but the denitrification process requires organic matter as the denitrification carbon source, and at the same time has the defects of high alkalinity production and sludge production, so it is applied to high concentration nitrate nitrogen These problems are particularly prominent when wastewater

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  • Method for treating high-concentration nitrate nitrogen in water
  • Method for treating high-concentration nitrate nitrogen in water
  • Method for treating high-concentration nitrate nitrogen in water

Examples

Experimental program
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Embodiment 1

[0020] The preparation of embodiment one denitrification filter material

[0021] This application adopts the method of CN107487840A to prepare denitrification filler. The main components of the prepared filler include sulfur element (sulfur), slow-release carbon source (corncob slow-release carbon source), metal oxide (manganese oxide) and carbonate (calcium carbonate). Wherein, the mass percentage of sulfur is 50%, the mass percentage of calcium carbonate is 25%, the mass percentage of corncob slow-release carbon source is 20%, and the mass percentage of manganese oxide is 5%.

[0022] On the surface of biofiller, sulfur autotrophic denitrifying bacteria and heterotrophic denitrifying bacteria adsorb on it to form biofilm. In the process of treating nitrate nitrogen in water, elemental sulfur provides electrons for sulfur autotrophic denitrification bacteria to denitrify nitrate nitrogen to generate nitrogen and sulfate. The slow-release carbon source provides electrons fo...

Embodiment 2

[0025] Example Two: Verification of denitrification effect of denitrification filter material

[0026] In the present embodiment, based on Example 1, it has been verified that different sulfur autotrophic denitrifying bacteria and heterotrophic denitrifying bacteria are effective in artificially simulating high-concentration nitrate-nitrogen wastewater, nitrate-nitrogen (NO 3 - -N) concentrations are respectively 100mg / L, 200mg / L, 300mg / L, 400mg / L, 500mg / L, 600mg / L, 800mg / L, 1000mg / L Treatment efficiency.

[0027] In this embodiment, the sulfur autotrophic denitrifying bacteria are selected from Thiobacillus denitrificans ATCC 25259 or Paracoccusversutus LYM; the heterotrophic denitrifying bacteria are selected from Paracoccus denitrificans ACCC 10489 or Pseudomonas stutzeri (Pseudomonas stutzeri) ATCC 17588; The above-mentioned microorganisms belong to microorganisms known in the art. For example, Thiobacillus denitrificans ATCC 25259 is disclosed in CN103773706A; Paracoccu...

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Abstract

The invention provides a denitrification filter material for treating high-concentration nitrate nitrogen in water. The denitrification filter material comprises a denitrification filler, sulfur autotrophic denitrifying bacteria and heterotrophic denitrifying bacteria, the denitrification filler comprises sulfur, a slow-release carbon source, carbonate and metal oxide, the sulfur autotrophic denitrifying bacteria and the heterotrophic denitrifying bacteria form a biological membrane on the surface of the deamination filler; the sulfur autotrophic denitrifying bacteria and the heterotrophic denitrifying bacteria are respectively selected from Paracoccus versutus LYM and Pseudomonas stutzeri ATCC17588. The denitrification filter material disclosed by the invention has relatively high treatment efficiency on high-concentration nitrate nitrogen and has a wide application prospect.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a method for treating nitrate nitrogen in water. Background technique [0002] Nitrogen is one of the main factors leading to eutrophication of water bodies. In the treatment of eutrophication problems in water bodies, reducing the nitrogen content in water has become the top priority. The traditional denitrification technology is biological nitrification and denitrification, but this denitrification needs to consume a large amount of dissolved organic matter, that is, carbon source, and the carbon source of landscape water is seriously insufficient, so the denitrification effect is extremely poor. [0003] With the acceleration of industrialization, the pollution of groundwater and surface water has gradually increased. NO 3 - As a water pollutant, it widely exists in surface water and groundwater, and seriously threatens human health. With the improvement of the total nitrogen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F101/16
CPCC02F3/34C02F3/348C02F2101/163C02F2101/166C02F2209/15C02F2305/06
Inventor 不公告发明人
Owner 陈余豪