In the process of sewage treatment, a large amount of sludge is often generated. The sludge can occupy approximately 0.3% to 0.5% of the treated water (based on a moisture content of 97%). The disposal of these sludges accounts for a high proportion of the construction costs and operating costs in the sewage treatment plant. Therefore, the sludge treatment is a very important part of the sewage treatment system. At present, many users use sludge dewatering decanter centrifuges for sludge dewatering.
In fact, with the continuous renewal and improvement of technology, today's sludge processing process has been relatively mature. Sludge dewatering and decanter centrifuges are used to achieve the final disposal of sludge by using different combinations of process solutions such as concentration, digestion, mechanical dewatering, natural drying, composting, and dry incineration.
Due to the different practical applications, sludge dewatering decanter centrifuges have gradually extended many different model specifications. For example, one of them is mainly used in the water treatment industry, including municipal sewage, sewerage, various types of industrial production wastewater, landfill leachate, tunnel mud, water discharge paper, and chemical factory discharge water. In this type of field, general-purpose devices are generally used.
Another type of sludge dewatering decanter centrifuge is mainly used in the manufacturing field. Due to different manufacturing processes, different material properties, and different centrifugal requirements, there are various special requirements for the centrifuge itself. Among them, subdividing it can be mainly divided into three aspects: The first one is used in the mining industry. This type of machine needs very high requirements for the wear resistance of the centrifuge.
The second type of sludge dewatering decanter centrifuges mainly serve the food and pharmaceutical industries. This type of machine has higher requirements for processing drums and spirals. There is also a part for the chemical industry, such as synthetic resin, palm oil, waste oil, polymer and semiconductor production discharge water projects. It mainly uses sludge dewatering decanter centrifuges to achieve the separation of high viscosity liquids and tiny particles.