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Sulfur preparation and method for removing nitrate nitrogen from water

A nitrate nitrogen and water removal technology, applied in the field of water treatment, can solve the problems of poor denitrification ability, low specific surface area of ​​sulfur particles, and low denitrification rate

Active Publication Date: 2022-05-24
BEIJING ENFI ENVIRONMENTAL PROTECTION CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The main purpose of the present invention is to provide a sulfur preparation and a method for removing nitrate nitrogen in water, so as to solve the problem of low specific surface area of ​​the existing sulfur particles when using sulfur particles as electron donors for autotrophic denitrification in the prior art. Limited contact between membrane and sulfur leads to low denitrification rate, resulting in poor denitrification capacity

Method used

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  • Sulfur preparation and method for removing nitrate nitrogen from water

Examples

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Comparison scheme
Effect test

Embodiment 1

[0048] use figure 1 The denitrification and denitrification device shown is for anhydrous autotrophic denitrification and denitrification treatment, as follows:

[0049] To prepare a sulfur preparation, in parts by weight, 60 g of simple sulfur, 10 g of sodium polysulfide and 30 g of nano-magnesium aluminum silicate are mixed to form a sulfur preparation.

[0050] The sludge containing the autotrophic denitrifying bacteria is placed in the reaction part, the above-mentioned sulfur preparation and the water to be treated are passed into the water inlet part, and after the water inlet part is mixed evenly, it enters the reaction part and contacts with the autotrophic denitrifying bacteria group. Reactive denitration. The denitrified product enters the three-phase separation part for three-phase separation, nitrogen is discharged from the gas collecting pipe, the purified water overflows from the side under the blocking of the blind plate, and the sludge settles back to the reac...

Embodiment 2

[0053] The difference from Example 1 is that the average water temperature is 10°C.

[0054] After treatment, the effluent of purified water is more transparent and clearer, and the removal rate of nitrate nitrogen is 58%.

Embodiment 3

[0056] The difference from Example 1 is that: a sulfur preparation is prepared, by weight, 60 g of simple sulfur, 20 g of sodium polysulfide and 20 g of nano-magnesium aluminum silicate are mixed to form a sulfur preparation.

[0057] After treatment, the effluent of purified water is transparent and clear, and the removal rate of nitrate nitrogen is 74.46%.

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Abstract

The invention provides a sulfur preparation and a method for removing nitrate nitrogen in water. The sulfur preparation includes a first component, a second component and a third component, the first component is sulfur element, and the second component is one or more of sodium polysulfide, potassium polysulfide and ammonium polysulfide , the third component is nano magnesium aluminum silicate. Due to its strong hydrophobicity, elemental sulfur easily aggregates and floats on the liquid surface in water, or condenses into agglomerates and deposits at the bottom of the reactor, which seriously affects the contact between elemental sulfur and sulfur autotrophic denitrifying bacteria, reducing the cost of chemicals. Utilization and denitrification rate. The sulfur preparation provided by the present invention overcomes this defect well, and it can be dispersed more uniformly in water, and can be dispersed to form fine particles suspended in the dispersion medium without precipitation after being put into water, and microorganisms can fully contact with such particles , thus effectively improving the mass transfer efficiency, correspondingly increasing the denitrification rate and the utilization rate of sulfur powder.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a sulfur preparation and a method for removing nitrate nitrogen from water. Background technique [0002] The situation of water resources in my country is worrying, and the distribution of time and space is extremely uneven. For example, the water bodies in the Huaihe, Liaohe and other basins are seriously polluted, and the eutrophication of large-scale water bodies in Dianchi Lake, Taihu Lake, Chaohu Lake and other lakes, eutrophication leads to cyanobacteria in the water source. The chance of large-scale outbreaks has greatly increased, threatening the safety of drinking water sources, and algal toxins can affect human health through the food chain, directly affecting human health and survival, and making the already scarce water resources even more strained. [0003] Nitrogen is one of the main factors leading to eutrophication of water bodies. Therefore, in the treatm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28C02F101/16
CPCC02F3/28C02F2101/16Y02W10/10
Inventor 骆平张强麻倩崔骁马效贤
Owner BEIJING ENFI ENVIRONMENTAL PROTECTION CO LTD