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Vertical flow constructed wetland and method for treating nitrogen, phosphorus and tetracyclines in sewage

A technology of constructed wetlands and tetracyclines, applied in the direction of aerobic and anaerobic process treatment, sustainable biological treatment, chemical instruments and methods, etc., can solve the problems of low treatment efficiency and large occupied area of ​​constructed wetlands, and achieve improved removal load, easy maintenance and management, and the effect of reducing investment costs

Active Publication Date: 2020-11-20
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for removing N, P and tetracycline in sewage by a vertical composite flow constructed wetland, which solves the problems of large occupied area and low treatment efficiency of the prior art constructed wetland

Method used

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  • Vertical flow constructed wetland and method for treating nitrogen, phosphorus and tetracyclines in sewage
  • Vertical flow constructed wetland and method for treating nitrogen, phosphorus and tetracyclines in sewage

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0028] A vertical composite flow artificial wetland, including a first-stage vertical flow artificial wetland pool, a second-stage vertical flow artificial wetland pool, and a third-stage vertical flow artificial wetland pool in series. A water inlet pipe 1, a first water distribution pipe 2 is provided at the bottom of the first-level vertical flow artificial wetland pool, and the first water distribution pipe 2 is connected with the first water inlet pipe 1, and a first aeration pipe is provided above the first water distribution pipe 2 Pipe 3, a first packing layer 4 is provided above the first aeration pipe 3, a first soil layer 5 is provided on the first packing layer 4, and a junction between the first packing layer 4 and the first soil layer 5 is provided The first outlet pipe 6; the bottom end of the first-level vertical flow artificial wetland pool is also provided with a first cushion 7;

[0029] The secondary vertical flow constructed wetland pool is connected to th...

Embodiment 2

[0040] The vertical flow constructed wetland and artificial simulated wastewater used in Example 2 are the same as those in Example 1, except that the aquatic plants planted in Example 2 are cannas.

[0041] Step 1, the sewage prepared in Example 1 enters the first-level vertical flow constructed wetland pool through the first water distribution pipe 2, and the air-water ratio in the first-level vertical flow constructed wetland pool is controlled to be 10:1, the HRT is 20h, and the hydraulic load is 0.08m 3 / m 2 d, after the reaction is completed, the effluent of the first-order vertical flow constructed wetland pool is obtained;

[0042] Step 2, the outlet water of the first-level vertical flow constructed wetland pool enters the first-level vertical flow artificial wetland pool through the second water distribution pipe 11 in a downward vertical flow manner, and at the same time, the sewage prepared in step 1 passes through the second water inlet pipe 12 in a downward vert...

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Abstract

The invention discloses a vertical flow artificial wetland. The vertical flow artificial wetland comprises a first-stage vertical flow artificial wetland pond, a second-stage vertical flow artificial wetland pond and a third-stage vertical flow artificial wetland pond which are sequentially connected in series, wherein aerator pipes are arranged in the first-stage vertical flow artificial wetland pond and the third-stage vertical flow artificial wetland pond, filling layers are arranged above the aerator pipes, soil layers are arranged on the filling layers, and aquatic plants are planted on the soil layers; and the aerator pipe is not arranged in the second-stage vertical flow artificial wetland pond, the other inner structure of the second-stage vertical flow artificial wetland pond is same as that of the first-stage vertical flow artificial wetland pond, and a second water inlet pipe is arranged above the second-stage vertical flow artificial wetland. The invention further provides a method for treating nitrogen, phosphorus and tetracyclines in sewage by virtue of the vertical flow artificial wetland. By virtue of the purification capacity of a middle and rear segment of the vertical flow artificial wetland, the removal load is increased, and the occupied area is reduced; and the effluent index of the vertical flow artificial wetland is increased by virtue of aeration, so that the effluent reaches the standards, and a simple and feasible method for the small-scale sewage treatment is provided.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a vertical flow artificial wetland and a method for treating tetracyclines in sewage. Background technique [0002] The total amount of fresh water resources in my country ranks sixth in the world, but the per capita water resources are only 2200m 3 , close to a quarter of the world average. According to the forecast of relevant departments, my country's population will reach 1.6 billion by 2030, and the per capita water resources will only be 1750m by then. 3 , which is close to the internationally recognized water shortage standard. With the rapid and stable growth of my country's national economy and the rapid advancement of urbanization, the population continues to grow, and the water demand in my country's cities and towns is also increasing. At the same time, water pollution is increasing day by day, resulting in water shortage, which makes the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/32C02F3/34C02F3/30C02F9/14C02F101/16C02F101/38C02F101/10
CPCC02F3/301C02F3/302C02F3/32C02F3/34C02F2101/105C02F2101/16C02F2101/38Y02W10/10
Inventor 李旭辉郭瑞超滕光清朱伟刚易礼陵
Owner HENAN UNIVERSITY
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