Material for removing nitrates in water by autotrophic microbe denitrification process

A technology of autotrophic microorganisms and denitrification, applied in biological water/sewage treatment, chemical instruments and methods, special compound water treatment, etc., can solve the problems of microbial metabolism inhibition, system alkalinity drop, poor treatment effect, etc., to achieve Improve efficiency, high removal efficiency, and good water quality

Active Publication Date: 2016-06-01
北京涞澈科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the sulfur autotrophic denitrification reaction proceeds, the alkalinity of the system continues to decrease, microbial metabolism is i

Method used

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  • Material for removing nitrates in water by autotrophic microbe denitrification process
  • Material for removing nitrates in water by autotrophic microbe denitrification process
  • Material for removing nitrates in water by autotrophic microbe denitrification process

Examples

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Embodiment 1

[0038] In this embodiment, the autotrophic microbial denitrification method is used to remove nitrate in water, and the material is 3mm granular in particle size; the material contains elemental sulfur and calcium carbonate, and the mass ratio of the elemental sulfur to calcium carbonate is 2.5 1: 20-100 mesh limestone powder is used as raw material to form the calcium carbonate in the material.

[0039] The preparation method of the material for removing nitrate in water by the autotrophic microbial denitrification method in this embodiment, the specific operation steps are:

[0040] 1) Use tinfoil to weigh 25.0g elemental sulfur powder, fold the four edges of the tinfoil into a carton shape, place the elemental sulfur to liquefy and flow out, then place the tinfoil and elemental sulfur powder together on a constant temperature electric heating plate to Raise the temperature to 105°C at a heating rate of 5°C / min to completely melt the elemental sulfur and obtain liquid sulfur...

Embodiment 2

[0044] In this embodiment, the autotrophic microbial denitrification method is used to remove nitrate in water, and the material is 1mm granular in particle size; the material contains elemental sulfur and calcium carbonate, and the mass ratio of the elemental sulfur to calcium carbonate is 3.0 : 1; 20-100 mesh egg shell powder is used as raw material to form the calcium carbonate in the material.

[0045] The preparation method of the material for removing nitrate in water by the autotrophic microbial denitrification method in this embodiment, the specific operation steps are:

[0046] 1) Use tinfoil to weigh 30.0g elemental sulfur powder, fold the four edges of the tinfoil into a carton shape, place the elemental sulfur to liquefy and flow out, then place the tinfoil and elemental sulfur powder together on a constant temperature electric heating plate to Raise the temperature to 110°C at a heating rate of 7°C / min to completely melt the elemental sulfur and obtain liquid sulf...

Embodiment 3

[0050] In this embodiment, the autotrophic microbial denitrification method is used to remove nitrate in water, and the material is 5mm granular in particle size; the material contains elemental sulfur and calcium carbonate, and the mass ratio of the elemental sulfur to calcium carbonate is 1.25 : 1; 20-100 mesh scallop shell powder is used as raw material to form the calcium carbonate in the material.

[0051] The preparation method of the material for removing nitrate in water by the autotrophic microbial denitrification method in this embodiment, the specific operation steps are:

[0052] 1) Use tinfoil to weigh 25.0g elemental sulfur powder, fold the four edges of the tinfoil into a carton shape, place the elemental sulfur to liquefy and flow out, then place the tinfoil and elemental sulfur powder together on a constant temperature electric heating plate to Raise the temperature to 115°C at a heating rate of 10°C / min to completely melt the elemental sulfur and obtain liqui...

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Abstract

The invention relates to the technical field of microbial-process water treatment, and particularly discloses a material for removing nitrates in water by an autotrophic microbe denitrification process and a preparation method thereof. The material is granular; and the material contains a simple substance sulfur and calcium carbonate in a mass ratio of 1.25:1-3.0:1. By compositely forming the simple substance sulfur and calcium carbonate in the granular material, the material has a rough surface, is beneficial to microbial attachment, and can provide an electron donor sulfur, an inorganic carbon source and an alkalinity-regulating buffering agent for microbes after being added once, so that the reaction is carried out continuously and efficiently, and the nitrates in the water can be completely converted into nitrogen; and thus, the material has high nitrate removal efficiency, does not need any additional additive, and is convenient to use. Underground water treated by the material hardly contains nitrates and NH4<+>-N, and achieves the national drinking water standard. The preparation method is simple to operate and easy to control. The finished product is stable and easy to transport, and thus, is suitable for industrialized popularization and application.

Description

technical field [0001] The invention relates to the technical field of microbial water treatment, in particular to a material for microbial denitrification to remove nitrate in water and a preparation method thereof. Background technique [0002] Groundwater is a very precious fresh water resource, which is widely used as a source of drinking water in countries all over the world. In the United States, about 50% of urban residents and 90% of rural residents use groundwater as their drinking water source. In China, the source of drinking water in many northern cities is groundwater. However, with the rapid development of my country's industry and the gradual development of urbanization, the problem of groundwater pollution has become increasingly serious. In 2011, the groundwater monitoring results in 200 cities across the country showed that 55% of the urban groundwater was polluted to varying degrees, and the groundwater pollution in many of these cities showed a trend of...

Claims

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Application Information

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IPC IPC(8): C02F3/28C02F3/34
CPCC02F3/28C02F3/34C02F2305/06
Inventor 冯传平梁晶陈男
Owner 北京涞澈科技发展有限公司
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