1、 Overview

The artificial wetland ecosystem is a comprehensive ecosystem composed of high and low organisms, mainly large aquatic plants, and substrates in a water saturated state that are suitable for living under polluted environmental conditions. It applies the principles of species symbiosis and material cycle regeneration in ecosystems, as well as the principle of structural and functional coordination, to promote the benign cycle of pollutants in wastewater, fully tap into the production potential of resources, prevent environmental re pollution, and achieve the best benefits of sewage treatment and resource utilization.

Generally, artificial ponds are constructed and filled with fillers such as crushed stones, gravel, sand, and slag. Through artificial water diversion, sewage flows horizontally or diagonally in the matrix, and the oxygen transport effect of plant roots is utilized to remove pollutants through interception, filtration, adsorption, absorption, biochemical and chemical reactions.

2、 Principle

Artificial wetland ecosystem is a technology that utilizes the physical, chemical, and biological synergistic effects of soil, artificial media, plants, and microorganisms to treat sewage and sludge. Its mechanism of action includes adsorption, retention, filtration, oxidation-reduction, precipitation, microbial decomposition, transformation, plant shading, residue accumulation, transpiration of water and nutrient absorption, and the comprehensive effects of various animals.

3、 Advantages

(1) High efficiency

The constructed wetland system is a comprehensive ecosystem with high BOD COD、TSS、TP、TN、 The removal rate of pollution indicators such as algae, petroleum, and heavy metals;

(2) Low investment, low operating costs, and low maintenance technology

The investment and operating costs of artificial wetland systems in sewage treatment are only 1/10 to 1/2 of those of traditional secondary sewage treatment plants; Artificial wetlands basically do not require mechanical and electrical equipment, only regular inspections by individual professionals are needed.

(3) Low energy consumption

Artificial wetlands generally do not consume energy, which cannot be compared to other treatment methods. It solves both economic and environmental problems.

(4) Flexible processing capacity

Artificial wetlands can be utilized on-site depending on the scale of the sewage treatment plant; In addition, the construction is convenient and there are fewer structures and equipment to handle.

(5) Good processing effect and landscape effect

The effluent quality can meet the Class II to Class V standards of the Environmental Quality Standards for Surface Water (GB3838-88) depending on the different fillers in the plant pond. The treated water can be used as a drinking water source and landscape water in lakes, reservoirs, or rivers, as well as for flushing, car washing, irrigation, greening, and industrial reuse.

In addition, selecting suitable wetland plant species can beautify the environment and improve the ground landscape.

4、 Classification

The artificial wetland technology is mainly divided into surface flow artificial wetlands and subsurface flow artificial wetlands according to the water flow mode. Subsurface flow artificial wetlands can be further divided into horizontal subsurface flow artificial wetlands and vertical subsurface flow artificial wetlands, and can also be used as composite artificial wetlands.

4.1 Surface flow constructed wetland

Wastewater flows on the surface of soil and other substrates in artificial wetlands, relying on the interception effect of plant roots and surface soil, as well as the degradation effect of biofilms generated on roots and stems, to purify wastewater in the form of artificial wetlands.

4.2 Horizontal subsurface flow constructed wetland

Wastewater enters from one end of an artificial wetland, flows in a nearly horizontal flow under the surface of the wetland bed, and finally flows towards the outlet, thus purifying the wastewater in the form of an artificial wetland.

4.3 Vertical subsurface flow constructed wetland

The form of artificial wetland in which sewage flows vertically from the surface of the wetland through the bottom of the substrate bed or vertically upward from the bottom to the surface, allowing sewage to be purified.

5、 Efficient composite artificial wetland technology system

5.1 Technical Introduction

The new efficient composite artificial wetland system is a new water treatment system independently developed by our company. This technology combines traditional wetland technology with biotechnology, improves the traditional wetland process, changes the traditional horizontal and downward flow to upward flow, effectively solves the problem of wetland blockage, and introduces efficient engineering bacteria into the wetland according to water quality, greatly improving the treatment efficiency and effectiveness of the wetland. It is a major innovation in existing wetland technology, improving the poor V water quality of the original water body to Class III-IV water quality, and has been well received by customers.

5.2 Technical Effects

It can effectively remove suspended solids in water and significantly reduce the abundance of nutrients in the water;

COD removal rate of 70-90%, total nitrogen and total phosphorus removal rate of 70-95%;

The water quality of the water body can meet the national surface water standards of Class III to IV.