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Wastewater treatment process is an important means to promote water circulation and save water resources. This paper selects several typical traditional and advanced sewage treatment processes and analyzes and compares their principles, advantages, disadvantages, and application range. Traditional processes, such as activated sludge and oxidation ditch processes, are widely used worldwide because of their low cost, simple operation and mature process. However, they all have the problems of large footprint, long operation cycles and poor sewage treatment effect. Compared with the advanced process, the scale variability is stronger, the sewage treatment effect is better, and the operation cycle is short. Among them, advanced oxidation processes and membrane bioreactor processes show important potential. They can treat different water quality and better treat refractory organic matter with fewer byproducts. Membrane technology and new materials use semi-diaphragm separation technology, which is more suitable for the treatment of inorganic substances, and the water is fast. However, these advanced processes have the problem of high material cost and energy consumption, which is the primary problem that needs to be solved.
Qinye Wang (Tue,) studied this question.