with the acceleration of urbanization, and the rapid development of the tourism industry, pollution control has become an increasingly tough task. in the current context that the original wastewater interception facilities do not support integrated management, and existing wastewater collection network is incomplete, it is urgent to speed up wastewater interception around the erhai lake. the protection and management of the erhai lake will take a long time at an enormous cost. the ppp model has not only solved the most critical financing problem, but also the problem of poor operations and management faced by many erhai lake management projects through market-based approaches.
at present, the dali erhai lake water environment management ppp project has been involved in the second batch of ministry of finance demonstration ppp projects. the project is designed with six wwtps and corresponding sewer pipe networks. by 2030, the total treatment capacity will reach 118,000 m3/d, and nine new ponds will be built. by 2020, six wwtps with a total treatment capacity of 54,000 m3/d will be built; 235.38 km of wastewater pipes (channels) will be laid/built on the east, north and west banks of the erhai lake; 21.94 km of tail water pipes will be laid; and 17 new lift stations, including 12 wastewater stations and 5 tail water stations, will be built. the total investment of the project is estimated to be rmb 4.5 billion, including rmb 3.468 billion needed by 2020.