Aerobic bio-particle carrier for directly removing ammonia nitrogen from sewage with low carbon nitrogen ratio and preparation method thereof

A low-carbon nitrogen ratio, biological particle technology, applied in the field of water treatment, can solve the problems of high cost, low denitrification efficiency, low efficiency, etc., and achieve the effects of no secondary pollution denitrification, high efficiency denitrification, and low cost.

Active Publication Date: 2013-06-12
BEIJING JIAOTONG UNIV
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  • Description
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  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is that if the low C/N ratio sewage adopts biological denitrification, it needs to add carbon source, if the carbon source is insufficient,

Method used

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Embodiment Construction

[0020] The material composition of aerobic low carbon nitrogen ratio sewage ammonia nitrogen direct denitrification biological particle carrier includes elemental iron powder, activated carbon powder, gypsum powder, copper powder and catalyst; the catalyst is one or more of manganese powder, titanium powder, magnesium powder and vanadium powder any combination thereof.

[0021] The material composition of aerobic low carbon nitrogen ratio sewage ammonia nitrogen direct denitrification biological particle carrier is 40-50% of simple iron, 35-42% of activated carbon powder, 5-8% of gypsum powder, and 4-4% of copper powder. 5%, manganese powder accounts for 1-2%, titanium powder accounts for 1-2%, magnesium powder accounts for 1-2%, and vanadium powder accounts for 1-2%.

[0022] One of the preparation methods of aerobic low carbon nitrogen ratio sewage ammonia nitrogen direct denitrification biological particle carrier, the preparation method comprises:

[0023] Step 1 is mixed...

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Abstract

The invention relates to an aerobic bio-particle carrier for directly removing ammonia nitrogen from sewage with low carbon nitrogen ratio and a preparation method thereof, belongs to the field of water treatment, and is used for solving the deficiencies of low biological denitrifying efficiency caused by insufficient carbon source of sewage with low carbon nitrogen ratio, complex process, high physicochemical treatment cost, secondary pollution and the like, so that efficient denitrification low in cost and free from secondary pollution is realized. The aerobic bio-particle carrier for directly removing ammonia nitrogen from sewage with low carbon nitrogen ratio comprises simple iron powder, active carbon powder, gypsum powder, copper powder and a catalyst, wherein the catalyst is one or any combination of manganese powder, titanium powder, magnesium powder and vanadium powder. The preparation method comprises the following steps of: taking and mixing materials according to material composition to prepare particles which are 5-20mm, drying and then roasting and cooling; and finally, cultivating the prepared particles in sewage through a microbial biofilm to obtain the aerobic bio-particle carrier for directly removing ammonia nitrogen from sewage with low carbon nitrogen ratio. According to the invention, sewage with low carbon nitrogen ratio is efficiently treated, so that the total nitrogen of sewage is removed over 90%.

Description

technical field [0001] The invention relates to a biological particle carrier for directly denitrifying sewage with a low carbon-nitrogen (C / N) ratio under aerobic conditions and a preparation method thereof, belonging to the field of water treatment. Background technique [0002] With the development of society and economy, various environmental problems are becoming increasingly prominent, among which the eutrophication of surface water and groundwater pollution caused by the discharge of large amounts of sewage (wastewater) have seriously affected people's lives. The ammonia nitrogen pollution in the current sewage is an extremely serious environmental problem. In order to reduce ammonia nitrogen in water, the methods commonly used in industry mainly include chemical and biological methods. Chemical removal of ammonia nitrogen is mainly based on stripping method and breakpoint chlorine addition method, but these two methods will cause secondary pollution to the environme...

Claims

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Application Information

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IPC IPC(8): C02F3/02
CPCY02W10/10
Inventor 李德生
Owner BEIJING JIAOTONG UNIV
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