Method for treating activated sludge

Abstract

The invention relates to a method for treating activated sludge. The method includes the following steps of adding sediment particles into the activated sludge to be treated to form mixed sludge and subjecting the mixed sludge to a dehydration treatment. Compared with methods of treating the activated sludge in prior art, the method has the advantage that the dehydration efficiency of the activated sludge can be effectively improved.

Description

technical field [0001] The invention relates to a treatment method of activated sludge. Background technique [0002] Wastewater biological treatment is a process in which microorganisms use pollutants in wastewater as their own nutrition and energy, and at the same time purify wastewater. Anaerobic / aerobic treatment process (A / O treatment process), as one of the wastewater biological treatment methods, has become the main means of treating urban domestic sewage and industrial wastewater in countries all over the world. [0003] A large amount of activated sludge will be generated after the wastewater is processed through the A / O treatment process. At present, the main disposal schemes for activated sludge are: concentration, dehydration, and drying to form mud cakes, and then incinerate, landfill or compost the mud cakes. In the process of dewatering activated sludge, traditional disposal methods usually use mechanical means to separate mud and water. However, due to the ...

AI Technical Summary

Problems solved by technology

In the process of dewatering activated sludge, traditional disposal methods usually use mechanical means to separate mud and water. However, due to the stable water content of solid particles in activated sludge, the separation of mud and water is difficult, so the simple method used in traditional disposal methods The dehydration effect of the mechanical separation method is very poor. Usually, the moisture content of the dehydrated sludge is generally above 80%. After the sludge with a high moisture content enters the drying process, a large amount of heat energy will be consumed to evaporate the sludge. moisture

[0004] In view of the characteristics of complex components of activated sludge, low dehydration efficiency, and low utilization rate of resources, the treatment and disposal of activated sludge has always been the focus and difficulty of wastewater sludge treatment, and has become a major problem in the industry.

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