Identification of development potentials

The Asia Pacific region is one of the fastest urbanized regions in the world, which brings additional pressure on local water supply, pollution control and ecological protection. In addition to these pressures, climate change has also led to frequent droughts. From 2015 to 2019, the number of people affected by drought in Asia reached 398 million, accounting for 84.5% of the global population affected by drought, and the economic loss reached 19.8 billion US dollars. In addition, about 80% ~ 90% of sewage in the Asia Pacific region is directly discharged without treatment, posing a threat to groundwater, surface water and coastal aquatic ecology.

In the face of the huge pressure and challenges related to water, it is very important to establish and maintain a sustainable multi-layer water circulation system for national water security. For the above problems, more and more people regard reclaimed water as an alternative water resource, which helps greatly reduce the environmental load, energy consumption and cost.

  n recent years, the contradiction between water supply and demand has become increasingly prominent. The use of reclaimed water is an effective way to alleviate the shortage of water resources, prevent water pollution and promote sustainable economic and social development. Some countries and regions in Asia have implemented effective renewable water use practices. However, in general, in most Asian countries and regions, sewage treatment and reclaimed water utilization are not developed. This paper believes that the per capita GDP and water resource pressure are the key factors affecting sewage treatment and renewable water utilization in Asia. Based on these factors, the development potential estimation model of sewage treatment and reuse was established by logistic regression analysis. According to the development status and future development potential of sewage treatment and reclaimed water utilization, 48 selected Asian countries are divided into four categories by using the model: high potential and high development, high potential and low development, low potential and high development, low potential and low development. According to the characteristics of these four classifications, the development route and measures of sewage treatment and reclaimed water utilization are put forward. This study provides important information for the development planning of sewage treatment and reclaimed water utilization in Asian countries, and helps to systematically promote and improve the level of sustainable water management.