Xinxiang, Henan Province, August 2023 - As global demand for aquatic products continues to rise and water shortages intensify, the aquaculture industry is facing multiple challenges of water pollution, frequent disease and cost control. Recently, the "third-generation intelligent shallow sand filter" independently developed by Henan Xinxiang Lifelte Filter Co., LTD. (hereinafter referred to as "Lifelte") has been applied on a large scale in the field of aquaculture, opening up a new path for the sustainable development of the industry with its efficient filtration, low energy consumption and intelligent management characteristics.

Breaking through traditional bottlenecks: Shallow sand filtration technology reshapes aquaculture ecology In traditional aquaculture, mechanical filtration, chemical agents and other water purification methods have drawbacks such as low efficiency, high maintenance costs, and secondary pollution. The shallow sand filter developed by Liffert Technology team based on the principle of fluid dynamics uses a multi-layer composite filter material structure, and can accurately remove suspended particles, algae, pathogens and heavy metal ions in water through the triple filtration mechanism of "adsorption-interception-sedimentation". The core component "dynamic backwash system" realizes automatic cleaning of filter material without manual intervention, effectively extending the service life of equipment to more than 3 times that of traditional equipment. "The modular filtration unit we designed can be flexibly combined according to the size of the farm, and a single unit can treat up to 500 cubic meters of water per day, while using only 60% of the energy of similar products." According to Wang Peng, chief engineer of Liffert, the technology has been certified by the Fishery Equipment Testing Center of the Ministry of Agriculture and Rural Affairs, and the removal rate of suspended matter is stable at more than 98%, and the efficiency of ammonia nitrogen degradation is increased by 40%.

Application scenario Landing: From freshwater aquaculture to Marine fishing ground covering a large shrimp breeding base in Zhanjiang, Guangdong, Lifelte shallow sand filter has been running for 18 months. Project leader Li Qiang said that the system has kept the water quality transparency of the aquaculture tank above 40cm, increased the survival rate of shrimp seedlings by 15% compared with the same period last year, and reduced the use of antibiotics by 30%. "The filter material used to need to be replaced twice a month, but now it is only maintained once every three months, and the labor cost is saved by half." The technology has also shown advantages in the field of mariculture. The application of the equipment in an abalone farm in Ningde, Fujian successfully solved the problem of seedling mortality caused by high turbidity of sea water. Through real-time monitoring of water quality parameters, the system can automatically adjust the filtration intensity, and with the UV disinfection module, the breeding cycle is reduced to 7 months, and the single batch yield is increased by 25%. "Liffert's innovation lies not only in its technical performance, but also in its' smart water management system '." Zhang Ming, president of the Equipment branch of the Chinese Fisheries Association, pointed out that the system is connected through the Internet of things, which can remotely monitor water temperature, dissolved oxygen, turbidity and other data, and generate water quality early warning models to help farmers intervene in advance. At present, the system has been connected to the smart fishery platform of 12 provinces and cities across the country, promoting the upgrading of digital management of the industry.

Green economy win-win: Help the aquaculture industry carbon neutral goal Aquaculture wastewater treatment has been an environmental pain point. Liefert filter reduces energy consumption by optimizing water flow path, and combines with biodegradation technology to reduce the COD (chemical oxygen demand) index of wastewater to less than 50mg/L, which meets the level 1 requirements of the Aquaculture Tail Water Discharge Standard. The "filter material recycling system" jointly developed by the company and the Ocean University of China can transform the waste filter sand into agricultural fertilizer and realize the recycling of resources. "We calculate that farms using this technology can reduce their annual carbon emissions by 20 tons, which is equivalent to the carbon sequestration effect of planting 10 acres of forest." Zhao Li, marketing director of Liffert, said that the company is working with a number of financial institutions to launch a "green equipment leasing program" to lower the technology application threshold for small and medium-sized farmers.

Lin Jianguo, academician of the Chinese Academy of Engineering and aquaculture expert, believes that Lifeldt's technological breakthrough provides water quality assurance for high-density aquaculture, but it needs to be further integrated with biological agents, artificial intelligence and other fields. "For example, combined with algal identification algorithms, we can develop 'smart filters' that automatically regulate filtration patterns, or use blockchain technology to achieve water quality data traceability and enhance the safety of aquatic products." Chen Lifeng, chairman of Lifelte, revealed that the company is investing 120 million yuan to build a "aquatic environmental protection equipment research and development center", and plans to launch the fourth generation of "nanomemofilm coupled sand filter system" in 2024, when the filtration accuracy will be increased to 0.1 micron, and energy consumption will be reduced by 30%. "Our goal is not only to provide equipment, but to build a 'water quality management ecosystem' to help the aquaculture industry to become resource-intensive and environmentally friendly." As the global demand for sustainable aquatic products grows, innovative companies like Liefert are reshaping the industry landscape through technological iterations. From aquaculture ponds to Marine fisheries, shallow sand filters not only solve the current water quality pain points, but also inject new momentum into the long-term development of the aquaculture industry with a green economic model.