Clarion Water Technologies | The Project

The Project

The Plant

Zhangye Wastewater Treatment Plant


Project name

Zhangye Wastewater Treatment Project


Zhangye, Gansu Province, China


ADB (Asian Development Bank)

Finance type

7491 – Loan


$55.00 million

Sector / Subsector

Water and urban infrastructure & services – Urban sewerage

Zhangye is located in central Gansu along the historical Northern Silk Road, Hexi Corridor, occupying 42,000 sq km, stretching from Inner Mongolia to the North to Qinghai in the South, but its urban core is at Ganzhou, in the oasis formed by Heihe or Ruo Shui River. Its streams, sunlight, and fertile soil make it an important regional agricultural center, although it was seriously damaged by overforesting in the 19th century.

Restoring the health of the river ecosystem and improving resilience to water-related disasters is an increasingly important priority of the Chinese government. According to the Ministry of Environmental Protection, 28% of the available surface water of the country's seven major rivers and 31% of the water of key lakes and reservoirs are unfit for human consumption. Once polluted to this degree, traditional pollution mitigation measures, such as standalone wastewater treatment facilities, are usually insufficient to recovery a water ecosystem. This project is a response to mitigate pollution and restore the health of the regional river and lake ecosystems through multiple, interlocking subprojects tendered under a single basin-wide concession.

The project will contribute to mitigation of water pollution of Heihe River, which will be accomplished through expanded wastewater management services under integrated concessions in the selected western province. By supporting a new form of PPP, environment management, and inclusive growth, the project addresses strategic priorities like managing climate change and the environment, supporting inclusive economic growth. In particular, the project aligns with this strategy’s sector focus on environmental protection, and complements initiatives in the management of water-based natural resources, including flood management, wetland conservation, water resources development, and the protection of biodiversity and ecosystems.

The project is in line with PRC’s water policy, aiming to reverse the degradation of water resources caused by agricultural, industrial, and municipal effluents, identifying wastewater management as a key operational focus in the rapidly industrializing China. The project is an example of the type of intervention envisaged by the 13FYP, which promotes water as a core investment area and raises ADB’s water investment target to $2.0 billion- $2.5 billion each year by 2020, with an additional $500 million per year targeted in private sector lending.


The plant location



Aerial view



Simulation of the plant site