Fuhe estuary wetland project
Focus on environmental protection and people’s livelihood
The Fuhe Estuary wetland is located in Anxin County, Xiongan New Area, in the algae 苲 lake area where the Fuhe River, Caohe River and Puhe River enter Baiyang Lake. The main task of the project is to purify the water quality of the lake. The project covers an area of 4.23 square kilometers, and the daily water treatment scale can reach 250,000 cubic meters. This project is currently the largest water environment treatment project launched in Xiongan New Area, and the largest functional ecological wetland with the largest scale and treatment capacity in North China (source: Power Construction Ecology Company website). It is reported that this is the first completed project of the Xiongan New Area ecological treatment water purification project, and it is also one of the first completed projects of the 67 key projects started in Xiongan New Area in 2019, and the subsequent Power Construction Ecology Company will continue to do a good job in wetland commissioning and operation to improve the water environment of Xiongan New Area.
Advanced technology to purify water
In constructed wetland, the filler in the substrate is an important part of the treatment of sewage, and it is very important to select the appropriate filler for the specific influent water quality. Zeolite as the main force of ammonia nitrogen treatment, in December 2010, became one of the matrix fillers of constructed wetlands was included in the Ministry of Environmental Protection formulated and promulgated the “Technical Specifications for Constructed wetland Sewage Treatment Engineering”, the Fuhe estuary wetland project will be zeolite as a wetland system filler, which can effectively enhance the infiltration capacity, strengthen the water purification effect, and purify downstream water quality. It is important to ensure the ecological basic flow.
01
What about constructed wetlands? There’s a college in there somewhere
Constructed wetland is a common technology in sewage treatment, which is widely used because of its relatively small footprint, high pollutant removal rate and difficulty in plugging. Constructed wetlands generally include soil (or artificial fillers, such as zeolite, etc.) and aquatic plants growing on it, which is a unique soil-plant-microbial ecosystem.
The most attractive feature of constructed wetland system is its good nitrogen and phosphorus removal effect, low investment, reasonable operation cost and easy maintenance and management. Moreover, wetland system often produces output (direct economic benefits brought by plant harvesting and indirect economic benefits brought by improvement of ecological environment such as plant greening). Reasonable design and management can realize profitable operation of wetland project. To provide a favorable guarantee for the long-term performance of sewage treatment projects.
02
How does zeolite purify water? Teach you to understand the point
In the constructed wetland, the filler in the matrix is an important part of the treatment of sewage in the constructed wetland, which has an important influence on the treatment effect. Fillers not only provide growth media for plants and microorganisms, but also directly remove contaminants through sedimentation, filtration and adsorption.
Relevant studies have shown that the removal of large suspended particles in constructed wetlands mainly depends on the physical filtration, precipitation and interception of the packed bed, while the removal of small suspended particles is mainly through the silting layer in the wetland system. Many analyses have shown that the particle size of the filler is the main factor affecting the hydraulic conductivity and matrix pore size of the system, which is directly related to the residence time of pollutants and the removal effect of pollutants. Therefore, the selection of fillers with larger specific surface area and higher porosity can improve the hydraulic conductivity of the wetland system and promote the restoration of water quality in a short time.
As a precious ore resource with huge reserves, zeolite has the characteristics of large inner surface and many holes, and strong adsorption and ion exchange ability. It can adsorb NH4+ ions in water through cation exchange and adsorption, and the structure of adsorbed compounds is stable, which can effectively remove ammonia nitrogen in water and strengthen the sewage treatment effect of constructed wetlands.
GTSS zeolite filter material main technical indicators data source: GTSS website And, over time, the cation in zeolite and NH4+ in sewage more easily to fully exchange to achieve the effect of nitrogen removal. According to the experiments of relevant researchers, at the concentration of 5mg/L ammonia nitrogen, the adsorption capacity of zeolite for ammonia nitrogen is 1.19 mg/g, and the removal rate is as high as 85.5%. In addition, the addition of zeolite in the constructed wetland, its rich elements can promote the growth of microorganisms, and can be repeatedly used in the constructed wetland to reduce secondary pollution.
GTSS zeolite filter material chemical composition, trace elements table
Participation in the water environment construction of Xiongan New Area is a historical responsibility and an opportunity of The Times. In addition, relying on its own research and development of zeolite water treatment technology, GTSS has participated in a number of water environment management projects in recent years, and the governance effect has been highly recognized by the national, provincial and municipal departments at all levels, setting a model for China’s water environment management and basin overall quality improvement projects.
(Part of water environment management projects participated by GTSS)
