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Water treatment system and method based on ecological core wetland

A water treatment system and wetland technology, applied in the field of water treatment, can solve the problems of high terrain requirements and large demand for land area, and achieve the effects of small footprint, easy operation and maintenance, and easy cleaning.

Pending Publication Date: 2019-10-01
NANJING FRONTIER ENVIRONMENTAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these water treatment systems are simply a combination of multiple reaction tanks / processes to form a fixed process flow system, so the demand for land area is large
In addition, its wetland units all depend on the existing land, so other units must be placed around the wetland unit, which requires high terrain

Method used

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  • Water treatment system and method based on ecological core wetland
  • Water treatment system and method based on ecological core wetland
  • Water treatment system and method based on ecological core wetland

Examples

Experimental program
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Effect test

specific Embodiment 1

[0044] Daily treatment of 5,000 tons of municipal tail water is raised, the influent TN and TP are 12.8mg / L and 0.49mg / L respectively, and the effluent TN and TP are required to meet the surface IV water standard, ie 1.5mg / L and 0.3mg / L. Three ecological core wetland units are set up for series treatment, and the way of passing water is as follows: 20% of the influent water first flows upward through the upper subsurface wetland layer, and then returns to the water inlet area of ​​the first unit of the lower biofilter layer and 80% of the water The water flowing downwards is combined, and after being treated by the first unit, it flows into the second unit and the third unit, and finally the effluent is discharged. The thickness of the subsurface wet formation filling area is 1m, the temperature is 15-30°C, and the HRT is controlled at 10h. The effective height of the lower biofilter is 3 meters, the residence time is 8 hours, the final effluent TN and TP are 1.4mg / L and 0.20m...

specific Embodiment 2

[0046] 1,000 tons of domestic sewage are treated daily, and 5 units are set up in series as a group, and a total of 2 groups are set up. The two groups of units are treated in parallel, and the sewage is evenly distributed into the two groups of ecological core wetland treatment systems. The aeration of the lower biological filter layer is stopped for 30 minutes every 40 minutes, the temperature is 15-30 ℃, and the HRT of each group is controlled at 8 hours. The final effluent meets the first-class A discharge standard.

specific Embodiment 3

[0048] The water quality of a certain river is inferior to Class V water, CODcr, NH 3 -N and TP indexes are 60mg / L, 10mg / L, and 0.4mg / L respectively. 10,000 tons of river water quality is improved per day, and 5 sets of ecological core wetlands are set up. The processing capacity of each group is 2000m 3 / d, each group of ecological core wetland is composed of 3 units connected in series. The residence time of the biological filter in each group of ecological core wetlands is 6h, and the effluent indicators CODcr, NH 3 -N, and TP reach 25mg / L, 1.2mg / L, and 0.20mg / L quasi-four water standards, and the removal rates reach 58%, 88%, and 50% respectively.

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Abstract

Provided is a water treatment system based on an ecological core wetland. The water treatment system includes an upper undercurrent wetland layer and a lower biological filter layer; the upper undercurrent wetland layer includes a support net frame, planting grooves (15-2), a filler (2), plants (3), a water inlet pipe and a water outlet pipe; the lower biological filter layer includes filter bodies, a water inlet pipe, a water outlet pipe, biomedia (6), aerating devices (7), a sludge discharging pipe (8), a water outlet (10) and a flow adjusting device (11); the water treatment system furtherincludes a dosing system (microorganisms and carbon sources) and a remote control system. An undercurrent wetland filler layer includes a phosphorus adsorption material at least, the plants are planted on the filler layer, and through the interception, sedimentation and adsorption effects of the filler layer, the microbial action of the filler layer and the absorption effect of plant root systems,pollutants in water are removed together; biological filters are a plurality of treating pools, wherein part of the treating pools are filled with the biomedia; flow is guided among the treating pools through guide pipelines; water flow channels are arranged between the upper undercurrent wetland layer and the lower biological filter layer.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a water treatment system and method based on an ecological core wetland. Background technique [0002] Rivers and lakes are the cradle of civilization and play an indispensable role in agricultural production, industrial development and social construction. However, the rapid development of industrialization and urbanization in recent years has caused serious water pollution and destroyed the ecological functions of water bodies. Many rivers and lakes even have seasonal or year-round black and odorous phenomena. The pollution of natural water bodies mainly comes from initial rainwater, tail water discharge from sewage plants, and agricultural sewage. Taking rain and sewage diversion as an example, with the acceleration of urban ecological civilization construction, although the construction of urban pipe network is becoming more and more perfect, it is still difficult to...

Claims

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Application Information

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IPC IPC(8): C02F3/32C02F3/34
CPCC02F3/32C02F3/34C02F2203/006C02F2209/08C02F2209/16C02F2209/14C02F2209/10C02F2209/18C02F2209/40C02F2301/08
Inventor 孙永健
Owner NANJING FRONTIER ENVIRONMENTAL TECH
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