Chengdu No.6 Water Treatment Plant B case study

Municipalities Design & Build

 

Our customer

Meeting the water needs of the fast-growing city of Chengdu

The Chengdu No.6 Water Plant B is located in the town of San Daoyan in Pi Country, 27 km north-west of Chengdu.

The Chengdu No.6 Water Plant B Project is a pilot Build Operate Transfer (BOT) project and the first international BOT water treatment plant project in China approved by Central Government. Following an international competitive bidding process, the project was awarded in 1998 to a consortium formed by Veolia Water and Marubeni Corporation.

The needs

Meeting the increasing need for tap water, the pilot plant project involves the construction and operation of a new water treatment plant with a capacity of 460 000 m3/d. The project also includes the construction of water intake facilities and the installation of a 27 km water transmission pipeline.

  • Water Intake

With two water intake works, one at the Xu Yan river as the main water intake point, and one at the Bo Tiao river as an auxiliary water intake point, the water plant is guaranteed raw water even if one of the rivers is closed for maintenance. Each intake point has a design capacity of 460 000 m3/d.

  • 27 km Transmission Pipeline

A 2.4m diameter steel transmission pipeline transmits treated water from Plant B to the urban distribution network of Chengdu 27 km away.

Our solution

Veolia Water Solutions & Technologies Municipal China is responsible for the design, construction, equipment supply, installation and commissionning of the new plant.

The Chengdu No.6 Water Plant B was designed using the leading water technologies developed by our Group. 

Flexible and robust design

The water plant works feature two parallel treatment lines with many sub-treatment lines for all crucial treatment processes. This maximizes the operational security of the plant by limiting the impact of any equipment breakdowns.

Compact MULTIFLO® settlers

Compact Multiflo® lamella settlers, a special technology developed by Veolia, are used. The special compact lamella technology increases the efficiency of the process.

High-veocity sand fiters

The size of the media particles used in the sand filters has been specially developed by Veolia Water to provide optimum velocity and efficiency in the filtration process.

Fully automated plant operation

The plant is fully automated using internationally-accepted, proven regulation mechanisms. This enables the plant to be operated with a minimum number of staff, thereby reducing operational costs.

Cost-efficient gravitational flow

As there is a natural elevation of 60m between the water intake and Chengdu, a gravitation design was used for the water intake, treatment process and treated water transmission. The absence of pumps means significant savings in electricity costs.

Procurement of local equipment

Extensive use has been made of equipment and materials manufactured in China. This means that maintenance costs will be lower, and replacement parts can be easily and quickly procured.