An activated carbon biological turntable coupled constructed wetland system and its application in urban black and odorous water bodies

A technology of constructed wetland system and biological turntable, which is applied to the activated carbon biological turntable coupled artificial wetland system and its application in urban black and odorous water bodies. It can solve the problems of high cost of water treatment, easy secondary pollution, and slow processing speed. Achieve the effect of improving sewage purification efficiency, increasing film hanging rate, increasing adsorption and degradation

Active Publication Date: 2021-06-15
SHENGSHI LANDSCAPE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of using physical methods such as filtration, aeration, air flotation and centrifugation to treat water bodies is relatively high; chemical methods include flocculation, sedimentation, electrolysis and oxidation, which are costly and prone to secondary pollution; biological methods include biological ponds and artificial Treatment methods such as wetlands are widely used but the processing speed is slow

Method used

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  • An activated carbon biological turntable coupled constructed wetland system and its application in urban black and odorous water bodies
  • An activated carbon biological turntable coupled constructed wetland system and its application in urban black and odorous water bodies

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 As shown, an activated carbon biological turntable coupled constructed wetland system includes a series activated carbon biological turntable 1 and a vertical flow constructed wetland; the activated carbon biological turntable 1 is based on a mesh polypropylene disc as a carrier, and the surface is loaded with sheet-like activated carbon; The vertical flow constructed wetland includes a pool body 2, in which a first partition 3 and a second partition 4 are sequentially arranged from left to right, the upper part of the first partition 3 is provided with a water inlet, the first The partition 3 and the second partition 4 divide the pool body 2 into a water inlet chamber, a water treatment chamber, and a water outlet chamber. The water treatment chamber is sequentially laid with a crushed stone layer 5, a ceramsite layer 6 and a photocatalytic filler layer 7 from bottom to top. The heights of the gravel layer 5, the ceramsite layer 6 and the photocatalyti...

Embodiment 2

[0047] The activated carbon biological turntable coupling constructed wetland system described in Example 1 is used, the difference is that some parameters in the preparation step of the photocatalytic filler layer 7 are changed, as follows:

[0048] 1) Bismuth nitrate (Bi(NO 3 ) 3 ·5H 2 O ) was dissolved in dilute nitric acid with a concentration of 4.5 mol / L to obtain a nitric acid solution of bismuth nitrate (the molar concentration of bismuth nitrate in the nitric acid solution of bismuth nitrate was 1.8 mol / L), then tetraisopropyl titanate was added, and at 25 After stirring at constant temperature for 30 minutes at ℃, adjust the pH of the solution to 13 by using a sodium hydroxide solution with a concentration of 5.5 mol / L, then continue to stir for 2.5 hours, conduct a hydrothermal reaction at 210°C for 45 hours, cool to room temperature, take the precipitate, and use Ionized water and absolute ethanol were alternately centrifuged and cleaned, and vacuum-dried at 80° ...

Embodiment 3

[0056] Using the activated carbon biological turntable coupling constructed wetland system described in the examples, a certain black and odorous water body in Xinyang City was used as an example to illustrate. The COD in the water body was measured to be 194 mg / L, DO was 0.03 mg / L, and NH 4 + -N is 23 mg / L, TP is 11 mg / L, and the transparency is 10.5 cm. All indicators of the water body have seriously exceeded the national "Surface Water Environmental Quality Standards" (GB3838-2002) Class V water standards.

[0057] First, block the entry of foreign solid and liquid waste into the polluted river, and initially clean up the solid waste in the water body by manual or mechanical salvage; then send the black and odorous water body after preliminary cleaning into flocculation sedimentation, and the input concentration is about 26 ppm Polyferric sulfate (PFS) for flocculation and precipitation reactions. The flocs produced after the reaction are filtered out with a fine grid, and...

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Abstract

The invention discloses an activated carbon biological turntable coupling artificial wetland system, which comprises an activated carbon biological turntable and a vertical flow artificial wetland in series; The wetland pool body is provided with a water inlet room, a water treatment room, and a water outlet room in sequence from left to right. The water treatment room is laid with gravel layers, ceramsite layers, and photocatalytic filler layers in sequence from bottom to top, and aquatic plants are planted. , the photocatalytic filler layer is composed of bismuth titanate / cerium oxide composite material supported on coarse sand. The present invention proposes an activated carbon biological turntable coupling artificial wetland system, combining the strong photocatalytic properties of bismuth titanate itself and the strong adsorption and stability of cerium oxide, which can significantly increase the adsorption and degradation of pollutants in water bodies, It has the characteristics of recycling, harmlessness, high purification efficiency and large sewage treatment capacity, and can be applied to the purification treatment of urban black and odorous water bodies.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to an activated carbon biological turntable coupled artificial wetland system and its application in urban black and odorous water bodies. Background technique [0002] Urban water bodies are an important part of urban ecosystems. Seasonal or year-round black and odorous urban water bodies will seriously affect the urban ecological environment and the health of residents. [0003] At present, most of the treatment methods for urban black and odorous water bodies are single physical, chemical and biological methods. However, the cost of using physical methods such as filtration, aeration, air flotation and centrifugation to treat water bodies is relatively high; chemical methods include flocculation, sedimentation, electrolysis and oxidation, which are costly and prone to secondary pollution; biological methods include biological ponds and artificial methods. Treatment meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14B01J23/18
CPCB01J23/002B01J23/18B01J35/004B01J2523/00C02F1/30C02F3/082C02F3/32C02F2303/02C02F2305/10B01J2523/3712B01J2523/47B01J2523/54
Inventor 李珂李玉鹏周秉彦余保林李帅陈新
Owner SHENGSHI LANDSCAPE GRP CO LTD
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