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Device and method for removing nitrate from water body based on biofilm reactor

A technology of biofilm reactor and membrane reactor, which is applied in chemical instruments and methods, water pollutants, energy wastewater treatment, etc., can solve the problems of increased operating costs, ineffective nitrate removal, and low denitrification activity. Achieve the effect of reducing operating costs, easy installation, and simple operation

Active Publication Date: 2019-06-07
NANJING INST OF GEOGRAPHY & LIMNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Most of the existing natural water in-situ treatment systems remove ammonia nitrogen or organic matter in water through aeration or combined with ecological floating beds, but ammonia nitrogen will be oxidized to nitrate by nitrifying bacteria under aerobic conditions
The denitrifying bacteria are anaerobic bacteria, so the method has no obvious effect on the removal of nitrate.
At the same time, most of the organic matter in the water body is difficult to be directly used by organisms, so the denitrification activity in the water body is low. At present, the removal method of nitrate in natural water body needs to add organic carbon sources, such as methanol, acetic acid, propionic acid, etc. but increased operating costs

Method used

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  • Device and method for removing nitrate from water body based on biofilm reactor
  • Device and method for removing nitrate from water body based on biofilm reactor

Examples

Experimental program
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Embodiment 1

[0033] This example illustrates a specific implementation of the device of the present invention.

[0034] Such as figure 1 The shown device for removing nitrate from water based on biofilm reactor includes a power device and a reaction device;

[0035] The power unit is located above the water surface and is placed on the water floating platform 5, including an air pump 3, a water pump 4 and an energy supply device for providing energy for the air pump 3 and the water pump 4; in this embodiment, the solar function is adopted, and the energy supply device includes a solar panel 1 and battery 2.

[0036] The reaction device is located at the lower part of the water surface, and includes an aerobic biofilm reactor 6, an anaerobic biofilm reactor 7, and a reactor base 8 from top to bottom; anaerobic biofilm reactor 7 and an aerobic biofilm reactor 6 is a cylindrical structure, and the material is selected from plexiglass. The anaerobic biofilm reactor 7 is an upflow reactor, a...

Embodiment 2

[0040]The difference between this embodiment and Example 1 is that the main body of the anaerobic biofilm reactor 7 is composed of upper and lower sections of plexiglass tubes, the upper section of plexiglass tubes is used as the filler layer 71, and light fillers are housed inside, and the lower section of organic glass tubes is used as the packing layer 71, and the lower section of organic glass tubes The glass tube is used as the plant residue layer 72, and the plant residue is housed; the inner diameters of the two sections of plexiglass tubes are the same, and the tubes are separated by a screen 70;

[0041] For fixedly connecting two sections of plexiglass tubes, the anaerobic biofilm reactor 7 is also provided with a stainless steel ferrule 9, the stainless steel ferrule 9 includes an annular stainless steel ferrule 91 and a stainless steel bar 92, and the annular ferrule at the lower end of the stainless steel ferrule 9 The stainless steel sleeve 91 is stuck on the lowe...

Embodiment 3

[0043] This example illustrates the specific implementation of the method of the present invention.

[0044] Method of the present invention specifically comprises the steps:

[0045] (1) Denitrification reaction to remove nitrate: the pump pumps the water containing nitrate into the bottom of the upflow anaerobic biofilm reactor through the water inlet. The bottom of the upflow anaerobic biofilm reactor is filled with plant residues and the upper layer is filled There are light fillers attached to denitrifying microorganisms, and the light fillers and plant residues are separated by screens, and the nitrate-containing water flows from the bottom of the upflow anaerobic biofilm reactor through the screens to the upper layer through the screens, and the nitric acid in the water The salt is reduced to nitrogen by denitrification reaction;

[0046] Among them, the carbon source required for the reaction is provided by the plant residue, and the plant residue releases organic car...

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Abstract

The invention discloses a device and a method for removing nitrate of a water body based on a biological membrane reactor. The device comprises a power device located above the water surface and a reaction device located below the water surface; the power device comprises an air pump, a water pump and a functional device, the reaction device sequentially comprises an aerobic biological membrane reactor and an anaerobic biological membrane reactor from top to bottom, the anaerobic biological membrane reactor is divided into an upper layer and a lower layer, and a plant residue is arranged on the lower layer, the upper layer is provided with a light filling material attached with microorganisms, and the two layers are separated by a filter screen; the water flow in the reactor adopts an ascending mode, and the nitrate-containing reaction water body sequentially passes through the plant residue layer and the light filling layer to remove the nitrate, then enters the aerobic biological membrane reactor to remove organic matters, and finally enters a natural water body. By means of the device and the method, the water body nitrate can be effectively removed, and the upper-layer water body and the lower-layer water body can be further mixed, the substance exchange can be accelerated and the biological purification process in the water can be strengthened. Meanwhile, the device can continuously run, the energy consumption is low, and the cost is low.

Description

technical field [0001] The invention relates to a device and method for removing nitrate from surface water bodies (such as lakes, rivers, reservoirs and ponds, etc.) using aerobic and anaerobic biofilm reactors. The device and the method can effectively remove the nitrate in the water body, and at the same time, can promote the mixing of the upper and lower water bodies. The device and method can also be combined with waste water biological treatment oxidation pond and artificial wetland to expand the treatment effect. Background technique [0002] Most of the existing natural water in-situ treatment systems remove ammonia nitrogen or organic matter in water through aeration or combined with ecological floating beds, but ammonia nitrogen will be oxidized to nitrate by nitrifying bacteria under aerobic conditions. However, denitrifying bacteria are anaerobic bacteria, so this method has no obvious effect on the removal of nitrate. At the same time, most of the organic matt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F101/16C02F101/30
CPCY02W10/37
Inventor 江和龙姚宗豹
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY
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