Aeration is not required for iron and manganese removal; the new filter media process is provided here for your reference.

Thread Content

This post was last edited by goldliyang on 2019-7-10 at 11:18. China is rich in mineral resources, which have laid a solid foundation for the country’s economic development; however, these underground mineral resources also pose certain challenges to society. Taking the three northeastern provinces as an example, this region is characterized by mountainous areas with rocks rich in iron; these rock layers contain high levels of iron along with a certain amount of manganese. After the rocks weather, some of this iron and manganese is washed into rivers during the melting of snow and the rainy seasons, while some seeps underground and replenishes the rivers during dry periods. Over time, this process leads to particularly serious problems related to excessive levels of iron and manganese in groundwater. Secondly, as a traditional industrial base in China, the Northeast sees high levels of industrial production that contribute to increased pollution. The development and utilization of groundwater pose a challenge. As an important source of water supply and a vital support for ecosystems, groundwater is essential for maintaining a healthy cycle in water systems. According to relevant authorities, about 70% of China’s population relies on groundwater as their primary source of drinking water; over 95% of the rural population across the country drinks groundwater. However, excessive levels of heavy metals pose a significant challenge to the utilization of groundwater. In particular, groundwater with a high manganese content is more difficult to treat. Traditional iron and manganese removal processes find it difficult to meet standards efficiently. Traditional iron and manganese removal process: Aeration + manganese sand filtration. Groundwater is pumped into an aeration tank where air is blown in to increase the dissolved oxygen level in the water; this causes ferrous iron/ferrous manganese to be oxidized into ferric iron/tetravalent manganese, which are insoluble substances. These substances are then filtered through a manganese sand system. Ferric ions in the water form an active oxide film on the surface of the manganese sand particles, enabling physical interception and adsorption, thereby reducing the concentration of iron ions in the water. Under the same conditions, since tetravalent manganese requires a stronger oxidizing environment, the efficiency of removing manganese is lower than that of removing iron. Insufficient oxidation and poor manganese removal: During the aeration and filtration process, it requires a stronger oxidizing environment to convert divalent manganese into tetravalent manganese; under normal aeration conditions, the oxidizing capacity is insufficient, which results in poor manganese removal. Complex processes and high operating costs: The processing is complicated, many devices are required, consumables are used in large quantities, and the overall operating costs are high. Frequent regeneration and high wastewater ratio: The manganese sand filtration system requires backwashing on a daily basis, which generates large amounts of wastewater, resulting in high costs in terms of time and energy. Large footprint and difficult management and maintenance: Aeration tanks require a large amount of space, making daily management and maintenance challenging. Process innovation and industry advancement to perfectly address inherent challenges. A new treatment method that delivers outstanding results: it reduces the manganese content in groundwater to below 0.01 ppm, while the standard limit is 0.1 ppm; the water output from the KL system is more than 10 times below the standard, resulting in excellent performance. It offers exceptional performance in removing other heavy metal ions. In addition to effectively removing iron and manganese, the KL filtration system can also significantly reduce levels of arsenic, zinc, copper, lead, radium, uranium, radioactive isotopes, and other heavy metals. It features low operating costs and high system utilization. The iron and manganese removal resin has a porous structure and a large specific surface area; despite having only a 10% manganese content, it offers better performance, thereby reducing the operating costs for enterprises. Integrated equipment eliminates the need for maintenance** – it simplifies the water treatment process and changes the traditional mode of operation; the integrated system solves the challenges associated with groundwater treatment. The regeneration frequency is low, resulting in less wastewater; the KL filtration system only needs to be backwashed once every three days, producing little regeneration wastewater. It is possible to achieve both economic benefits and environmental protection, taking big steps toward a happier life. The iron and manganese removal process not only solves the problem of excessive levels of these substances in groundwater in areas with high manganese content, but it also leads to improvements in water treatment techniques across the country. Simplifying the governance process to enhance the value of resources, innovating and upgrading groundwater treatment technologies, it helps businesses achieve balanced progress in economic development and environmental protection, thereby ensuring the safety of water supply for the public. Technological innovation and governance concepts complement each other, driving the emergence of new governance models and gradually changing enterprises’ environmental protection approaches and development patterns. To date, they have brought significant environmental and economic benefits to the water treatment industry, giving rise to new business forms in this sector.