To relief water pollution problem in Phuket, especially at the famous beaches, Phuket was  announced to the pollution control area and then Patong wastewater project was implemented by coordination between Pollution Control Department and Phuket province. The Project area is about 16.4 sq.km.

Target year for this project is 2015 AD. Estimated population is about 23,580. Average wastewater flowrate is 260  lpcd. with BOD5 of 100 mg./l., SS of 100 mg./l., TKN of 30 mg./l., and P of 8 mg.as P/l.

The services provided include :

• Study the number of populations and the wastewater quantity and quality.
  
  
• Review the reports and study the appropriated alternatives of the drainage,
  wastewater collection and treatment systems.
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• Detailed design of the drainage, wastewater collection and treatment systems.
  
  
• Prepare the cost estimation, the budget of the project and the tender documents.
  
  
• Determine the managerial and administrative organization of the drainage, wastewater collection and treatment systems.
  
  
• Determine the tariff rate of the wastewater collection and treatment systems from various user classes in order to collect the appropriated user charge.
  
  
• Undertake the initial impact of the environmental examination.
  
  
• Study on recycled method of the wastewater treated for the other activities.
  
  
• Provide technical advice during the project construction and operation stages.

The detailed of the completed systems are as follows :

• Detailed design of drainage system, consists of pipes range from 400 to 1,500 mm. with total length of  6.6 km., and box culvert of 1.8 x 1.5 to 1.8 x 1.8 m. at the length of 2.6 km.and canals improvementDetailed design of 12 drainage pump stations and a wastewater lift station
  
  
• Detailed design of activated sludge process wastewater treatment plant with a capacity of 6,850 cu.m./day