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Shallow bed de-nitrification filter tank and applications thereof

A denitrification filter and filter technology are applied in the field of shallow-bed denitrification filters, which can solve the problems of poor biological denitrification effect, deep filter bed depth, and high treatment cost, and achieve the reduction of usage, filter bed depth, and reduction. Effect of filter bed depth

Inactive Publication Date: 2020-03-27
光大水务科技发展(南京)有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problems of poor biological denitrification effect of the three-stage treatment process, deep filter bed depth and high treatment cost in the existing sewage treatment technology, the present invention provides a shallow bed denitrification filter and its application

Method used

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  • Shallow bed de-nitrification filter tank and applications thereof
  • Shallow bed de-nitrification filter tank and applications thereof
  • Shallow bed de-nitrification filter tank and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] In the shallow bed denitrification filter of this embodiment, the volume ratio of the iron filter material filled in the first treatment area 200 to the biological filter material filled in the second treatment area 300 is 1:4. Adopting particle diameter is the sponge iron of 3-5mm as the iron filter material of the first treatment area 200, and the iron content of sponge iron is 98%, and adopting particle diameter is the volcanic rock of 1-3mm as the biological material of the second treatment area 300 Filter material, the specific surface area of ​​volcanic rock is 19m 2 / g; both the inlet filter head 201 and the outlet filter head 301 are long handle filter heads for the filter; H1 is 3.3m, the filling height of sponge iron H2 is 2m, the filling height of volcanic rock H3 is 1.5m, H4 is 2.3m, H5 It is 2.7m.

[0057] The secondary biochemical effluent of municipal sewage treatment plants (total phosphorus, total nitrogen, dissolved oxygen, COD and other concentration...

Embodiment 2

[0064] The basic content of this embodiment is the same as that of Embodiment 1, except that in this embodiment, a carbon source is added to the second treatment zone 300 according to a C / N ratio of 6.5:1, and the carbon source is glucose.

[0065] After the sewage is treated by a shallow-bed denitrification filter of this embodiment, the total phosphorus of the sewage can be reduced from 1.4 mg / L to about 0.2 mg / L, and the total nitrogen can be reduced from 16 mg / L to 6 mg / L. In the case of adding carbon sources, it is guaranteed that the system effluent COD is 13mg / L and is always lower than the influent COD 14mg / L, and there is no risk of COD discharge exceeding the standard. The specific processing data are shown in Table 2 below.

[0066] Table 2 Effect of using shallow bed denitrification filter to treat sewage

[0067]

[0068]

Embodiment 3

[0070] The basic content of this embodiment is the same as that of Embodiment 1, except that the volume ratio of the iron filter material filled in the first treatment area 200 of this embodiment to the biological filter material filled in the second treatment area 300 is 1: 7. Adopting particle diameter is the sponge iron of 3-5mm as the iron filter material of the first treatment area 200, and the iron content of sponge iron is 98%, and adopting particle diameter is the volcanic rock of 1-3mm as the biological material of the second treatment area 300 Filter material, the specific surface area of ​​volcanic rock is 19m 2 / g; the water inlet filter head 201 and the water outlet filter head 301 are long handle filter heads for the filter; H1 is 3m, the filling height of sponge iron H2 is 1m, the filling height of volcanic rock H3 is 0.8m, H4 is 1.8m, and H5 is 2.5m.

[0071] The secondary biochemical effluent of municipal sewage treatment plants (total phosphorus, total nitrog...

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Abstract

The invention discloses a shallow bed de-nitrification filter tank and applications thereof, and belongs to the technical field of sewage treatment. The filter tank is divided into a first processingzone and a second processing zone. Different functional filter mediums are used in different processing zones. At the same time, a unique downward-upward bidirectional filtering technology is adopted,chemical reactions for rapidly removing oxygen and phosphor and biological reactions for removing nitrogen are separated; the depth of the filter bed is largely reduced; the nitrate nitrogen removalefficiency is improved, the risk that the COD of effluent exceeds the standards is reduced, and at the same time, the operation cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and more specifically relates to a shallow-bed denitrification filter and its application. Background technique [0002] At present, the common tertiary treatment processes in sewage treatment technology include ordinary filters that only have the function of physical filtration to remove suspended particles in sewage, such as V-type filters, or mainly have the functions of biological denitrification treatment and physical filtration to remove suspended particles in sewage, chemical A deep bed filter with phosphorus removal function. [0003] Among them, the V-type filter is a filter developed by the French company Degremont, and it was introduced from France to China in the late 1980s. The filter mostly uses quartz sand as the filter medium, and through tiny quartz sand Particle size, to physically intercept the suspended particles in the sewage, and to filter the impurities in the wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F101/10C02F101/16
CPCC02F3/286C02F2101/105C02F2101/163
Inventor 郭骐铭安平林王冠平石伟赵群陈晶俞朝廷李杰
Owner 光大水务科技发展(南京)有限公司
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