Application of Decanter Centrifuge in Domestic Waste Leachate: A Powerful Tool for Resource Recovery and Environmental Protection

Domestic waste treatment is an important part of urban management, among which the treatment and disposal of landfill leachate is a key issue. Landfill leachate is a liquid containing organic matter and dissolved pollutants produced by natural degradation of garbage and rainfall. Traditional landfill leachate treatment methods usually include biological treatment and chemical treatment. However, these methods have problems such as low efficiency, high treatment cost and environmental pollution. Decanter centrifuges are used in landfill leachate treatment and have become a powerful tool for resource recovery and environmental protection. As an efficient separation equipment, the decanter centrifuge separates the solid and liquid in the landfill leachate through the rotating centrifugal force and the characteristics of the material itself. For landfill leachate treatment, the application of decanter centrifuges is mainly concentrated in two aspects: solid-liquid separation and liquid-solid separation. In the solid-liquid separation process, the decanter centrifuge can settle and separate the suspended solid particles in the landfill leachate. Through appropriate speed and design parameters, the solid particles can be effectively separated from the liquid phase, forming solid sediment at the bottom of the centrifuge shell. These sediments can be further processed and utilized, such as making organic fertilizers, biomass energy, etc. During the liquid-solid separation process, the decanter centrifuge can dehydrate the water in the landfill leachate, thereby reducing the humidity and volume of the leachate. The water in the leachate is squeezed out by the action of the rotating centrifugal force, and the collected and separated water can be used for recycled water treatment or other purposes, such as flushing, irrigation, etc. The application of the decanter centrifuge in the treatment of landfill leachate brings several significant advantages. First, it can efficiently separate solids and liquids, improving the treatment efficiency and resource utilization efficiency. Secondly, the decanter centrifuge has a stable and reliable treatment effect on suspended solid particles and water, ensuring the quality and reliability of the treatment. In addition, the decanter centrifuge is easy to operate, occupies a small space, and has high integration with the existing treatment system. In summary, the application of the decanter centrifuge in the treatment of landfill leachate is an efficient, reliable and environmentally friendly solution. Through the separation technology of the decanter centrifuge, solid-liquid separation and liquid-solid separation in landfill leachate can be achieved, promoting the recycling of solid resources and the recycling of water resources. With the continuous advancement and innovation of technology, the application of decanter centrifuge in the field of landfill leachate treatment will be further developed and make greater contributions to the realization of environmental sustainable development and resource recycling.