Process flow of urban lake water treatment technology-Fornitore globale

4-16, Building 5, Baimenqian Industrial Zone, No. 215 Busha Road, Buji Street Office, Longgang District, Shenzhen City, Guangdong Province

Eutrophication is a common problem in shallow lakes in China, manifested by greenification of water bodies, even algae floating (known as hydration phenomenon), low transparency, aerobic upper layer, oxygen deficiency lower layer, fish death, water body odor, and so on. At present, for the management of small and medium-sized lakes, physical methods, chemical methods, biological ecological methods, etc. are mostly used, among which ecological methods are the most economically effective and easy to manage. The main method is to restore the submerged and emergent vegetation in the shallow water area and lakeshore zone of the lake, especially the submerged vegetation, so as to transform the lake ecosystem from a turbid algal lake to a clear grass lake in a steady state, and maintain a clean and aerobic ecosystem in the lake.

The key technology for restoring submerged vegetation in lakes is to quickly improve the transparency of lake water bodies, so that they can achieve the required light compensation intensity for submerged vegetation restoration. The main methods to improve the transparency of eutrophic water bodies include chemical algae killing, flocculation sedimentation, mechanical algae removal, etc. Chemical algae killing and flocculation sedimentation have certain residual toxins, which are not conducive to the ecological restoration of lakes. In particular, these methods increase the organic load of lake sediment, make the sediment in an anaerobic state, promote the release of phosphorus from the sediment to the lake, exacerbate the eutrophication level of the lake, and after flocculation, the sediment floats in patches, which is not conducive to the lake landscape; Mechanical algae removal mainly includes processes such as centrifugation and vibrating screens, which have high energy consumption, low efficiency, noise, and large equipment volume. The speed of algae removal is often much lower than the speed of algae reproduction, and the effect is unsatisfactory.

Process:

For water treatment processes with prominent eutrophication issues, we mainly adopt ecological control as the main approach, supplemented by manual control.

Firstly, asymmetric fiber filtration equipment, photocatalytic sterilization and algae removal equipment, and lake push flow system are used to remove planktonic algae from the lake water. At the same time, during the operation of the system, the growth of planktonic algae in the lake is inhibited. It is necessary to ensure that the shallow water area is clear to the bottom, creating conditions for the restoration of aquatic vegetation. On this basis, the submerged and emergent vegetation of the lake are restored, and submerged and emergent plants are planted along the shallow water area of the lake. This not only beautifies the artificial lake, but also increases the biodiversity of the artificial lake, establishes a complex and stable biological chain, and reduces various pollutants in the water body, preventing eutrophication of the water body from an ecological perspective. At the same time, submerged plants secrete chemical substances to... Inhibit the massive reproduction of algae, such as goldenrod and foxtail algae Kucao and other submerged plants belong to this category.
Multiple biological floating islands are set up in the center of the lake to enhance the landscape effect of the lake, reduce nutrients such as N and P in the lake water, inhibit algae growth in the water through the allelopathic effect of aquatic plants, restore the clean and aerobic ecosystem of the lake, and maintain the clear and green landscape effect of the lake.

Using non fiber filtration to remove algae, the algae in the lake water is directly removed through equipment. The removed algae sludge is collected by the equipment's collection system and used as flower fertilizer, while the purified water is directly discharged into the lake.

The photocatalytic sterilization and algae removal equipment accelerates the material circulation speed of the ecosystem, improves the biodiversity and self purification ability of the system. In water landscape management, it kills bacteria and algae, controls the number of algae in landscape water bodies, and prevents them from ultimately evolving into "algal blooms"; Can remove odors from water bodies; It can also remove recalcitrant organic compounds in water that cannot be removed by biochemical treatment.

The restoration of aquatic vegetation is an important component of ecological restoration of eutrophic water bodies. Eutrophication is mainly caused by excessive nutrient elements such as N and P in the water body. Reducing nutrient salts such as N and P and organic pollutants such as dead algae in the water body is a key measure for ecological restoration of eutrophic water bodies.

The plant floating island technology uses floating bodies and plastic nets to separate the water body into emergent plant areas. The plastic nets are respectively laid with special ceramic particle fillers that absorb N-poly P and ordinary fixed fillers. Aquatic plants, especially higher aquatic plants, are planted on the fixed fillers, and a water collection system is arranged in the ceramic particle fillers. The water collection system is directly connected to the biological manipulation area and the floating water oxygenation pump, forming convection and circulation of water between the two areas. Ceramic fillers can enrich nutrients such as N and P; The root system of aquatic plants can absorb and adsorb organic matter, and the biofilm of fillers and rhizosphere microorganisms can decompose organic matter in the water; Plant root exudates can inhibit the growth and reproduction of algae through the biochemical allelopathy of plants. Ecological filter beds for emergent plants have various water purification functions, such as organic pollution contact oxidation, plant absorption of nutrients, and plant allelopathy. They are important components of lake water ecological restoration technology.

System features:

1. The treatment process mainly adopts biochemical methods, supplemented by physicochemical methods, with simple operation, stable operation, and good treatment effect;

2. No toxic biochemical treatment agents are used, and there will be no secondary pollution to the environment;

3. Adopting integrated equipment, occupying less space, convenient construction, saving investment, beautiful and practical;

4. The electromechanical equipment is started and stopped by liquid level control, with fault protection, ensuring stable operation, simple operation, and high treatment efficiency of the water treatment system;

5. Can collect algae sludge for use as flower fertilizer, killing two birds with one stone.

In summary, the system has mature processing technology, reliable processing equipment, advanced control technology, and low processing costs. Adopting this design will definitely bring good social and economic benefits to enterprises and society.

　　Shenzhen Senwei Environmental Protection Equipment Engineering Co., LtdInheriting foreign high-tech technologies and research and development achievements, we are a professional urban water environment management company. We have led and participated in a total of 15 scientific research projects in domestic environmental protection, pollution control, and river management, and have published several scientific papers.