Constructed wetland compound gravel bed

A constructed wetland and gravel bed technology, which is applied in water/sludge/sewage treatment, biological water/sewage treatment, chemical instruments and methods, etc. Nitrogen and phosphorus, etc., to achieve the effect of being conducive to fixing and hanging film, improving air permeability and water content, and helping growth and reproduction

Active Publication Date: 2015-12-09
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem that the existing artificial wetland gravel bed has a general interception effect, is easy to block, and cannot remove nitrogen and phosphorus in sewage, and provides a composite gravel bed for artificial wetland

Method used

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  • Constructed wetland compound gravel bed
  • Constructed wetland compound gravel bed
  • Constructed wetland compound gravel bed

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0015] Specific embodiment one: the constructed wetland composite gravel bed of the present embodiment is made up of growth substrate layer 1 and filler layer 2, and growth substrate layer 1 is positioned at the top of filler layer 2, and growth substrate layer 1 is the mixture of soil and vermiculite, and filler layer 2 From the water inlet end to the water outlet end, it consists of gravel section 2-1, zeolite section 2-2 and volcanic rock gravel mixing section 2-3.

[0016] The constructed wetland composite gravel bed of this embodiment is divided into upper and lower layers according to the vertical direction. The growth substrate layer of the upper layer is used as the growth substrate of aquatic plants, and the filler layer of the lower layer is laid with gravel section, zeolite section, and volcanic rock in sequence from the water inlet end to the water outlet end. The gravel mixing section is used as the main body for filtering and adsorbing denitrification and phosphor...

specific Embodiment approach 2

[0017] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the growth matrix layer is uniformly mixed with soil and vermiculite according to the volume ratio of 2:(1-1.2). Others are the same as the first embodiment.

specific Embodiment approach 3

[0018] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the volcanic rock and gravel mixing section in the lower packing layer is uniformly mixed with volcanic rock and gravel in a volume ratio of 1: (1-1.2). Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a constructed wetland compound gravel bed which solves the problems that for an existing constructed wetland gravel bed, the interception effect is poor, and nitrogen and phosphorus in sewage can not be removed. The constructed wetland compound gravel bed is composed of a growth matrix layer and a filler layer, the growth matrix layer is located on the upper portion of the filler layer, the growth matrix layer is a mixture of soil and vermiculite, and the filler layer is composed of a gravel section, a zeolite section and a volcanic rock and gravel mixed section from the direction of a water inlet to the direction of a water outlet in sequence. According to the constructed wetland compound gravel bed, the COD removal rate is higher than 50 percent, the removal rate of total nitrogen and the removal rate of total phosphorus are both over 60 percent, and the constructed wetland compound gravel bed can be used for conducting interception on the sewage in the constructed wetlands.

Description

technical field [0001] The invention relates to an artificial wetland gravel bed and a laying method. Background technique [0002] Constructed wetland is a sewage treatment method that realizes natural wetland self-degradation of pollutants in sewage through human control. The sewage entering the constructed wetland is purified along the direction of flow through adsorption, interception, microbial degradation, precipitation, and plant root absorption. . The purification of water mainly depends on the interception and absorption of aquatic plants planted in wetlands, the filtration and adsorption of wetland gravel beds, and the decomposition of microorganisms. In addition to the role of intercepting particulate pollutants and adsorbing some pollutants, the upper part of the gravel bed is also used as a substrate for plant growth. The surface of the gravel bed substrate also serves as a carrier for microbial growth for the growth and reproduction of microorganisms. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
Inventor 邱珊马放杨乐徐善文赵龙彬
Owner HARBIN INST OF TECH
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