Project Models

We principally adopt the BOT, self-owned, TOT and O&M project models in our business. Our diversified and flexible project models can maintain our competitive edge and accelerate our business expansion.



  • BOT: The local government or its designee grants us the concession rights to undertake the financing, design, construction, operation and maintenance of the wastewater treatment facilities in the concession period. Upon the expiration of the concession period, we transfer back the relevant facilities and operation rights without consideration.

  • Self-owned: We undertake the financing, design, construction, operation and maintenance of the wastewater treatment facilities that are owned by us and retain all our operation revenue and profit.

  • TOT: The local government or its designee grants us the concession rights to undertake the operation and maintenance of wastewater treatment facilities during the concession period. Upon the expiration of the concession period, we transfer back the relevant facilities and operation without consideration.

  • O&M: We operate and maintain third party’s wastewater treatment facilities for a fixed period and an agreed management fee