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Water / Wastewater Project of the Year: Shortlist

For the water or wastewater treatment plant, commissioned during 2017, that shows the greatest innovation in terms of optimising its physical or environmental footprint.

Shortlisted Nominees


Bishui wastewater treatment plant, China

What is it?

A 180,000m3/d wastewater treatment upgrade and expansion in Beijing’s Tongzhou district.

Who is involved?

China Water Environment, a subsidiary of state-owned enterprise CITIC, owns 52% of the company responsible for financing the replacement of the existing facility. Shengshi Investment owns 43%, and the Tongzhou district government 5%. China Construction Third Engineering Bureau was the EPC contractor. Ultrafiltration membranes were supplied by Fenco, while Trojan supplied the UV disinfection system.

What makes it special?

After the Beijing city government announced it was moving its offices to Tongzhou in 2017, the pressure was on to tackle the area’s environmental problems. CITIC’s innovative RMB1.14 billion ($181 million) underground solution freed up 29.3 hectares of land for use as an urban park, while the treated effluent supplies a living water garden and artificial wetlands for public recreation.

Almost doubling the treatment capacity in just one third of the space was no mean feat, while upgrading the effluent quality to meet the most stringent of China’s new discharge standards involved a drastic reduction of ammonium and phosphorus levels. The purified water is now a key resource for local industry, residences and civic authorities.


The new facility creates 40 dry tons of sludge per day, and the deployment of heat pumps during the sludge drying phase allows the capture of thermal energy. With the heat extracted, the semi-dried sludge is then used as a fuel supplement for the local waste incineration plant, proving that China’s rampant expansion can go hand in hand with cradle-to-cradle thinking.


El Paso zero discharge plant, Texas

What is it?

A zero discharge treatment facility located adjacent to the 27.5MGD (104,088m3/d) Kay Bailey Hutchison brackish water reverse osmosis plant in El Paso, Texas.

Who is involved?

The owner is Enviro Water Minerals, which funded the project and contracted Veolia to operate and maintain the facility for ten years. Suez and Hydranautics supplied the membranes, while the ion exchange media and systems were supplied by ResinTech and Lanxess. The facility treats brine and brackish groundwater supplied by El Paso Water Utilities.

What makes it special?

A first-of-its-kind public-private partnership, this privately owned and operated facility utilises cutting-edge membrane and ion exchange treatment technologies to recover up to 2.2MGD (8,327m3/d) of potable-grade water from brine produced at the Kay Bailey Hutchison desalination plant, providing El Paso Water Utilities with a low-risk, low-cost brine management solution.

By recovering and commercialising valuable minerals and chemicals from the brine stream, and powering the facility using a co-located natural gas power plant instead of relying on the grid, Enviro Water Minerals succeeded in reducing the overall cost of its brine treatment process to such an extent that the service fee it charges El Paso is on a par with the unit cost of the utility’s own desalinated water.


With the water yield of its desalination plant effectively enhanced to 99%, El Paso is able to reduce the volumes of brackish groundwater it treats, thus extending the life of the Hueco Bolson Aquifer. By eliminating the need for brine disposal, it also neatly circumvents the environmental concerns of deep well injection. One day, all plants will be this resourceful.


Northern Treatment Plant, Colorado

What is it?

A new 24 million-gallons-per-day (90,850m3/d) advanced wastewater treatment facility near Denver, Colorado.

Who is involved?

CH2M carried out the design, construction and start-up of the facility for the Metro Wastewater Reclamation District, which serves 1.8 million people in metropolitan Denver and part of northern Colorado. Treatment equipment suppliers include Xylem, Evoqua, Suez, Misco, Huber, Parkson, and WesTech.

What makes it special?

With its existing facilities at capacity and stringent statewide nutrient criteria for nitrogen and phosphorus removal on the horizon, Metro Wastewater Reclamation District needed to take proactive measures to ensure regulatory compliance. It did so in style, commissioning one of the most advanced wastewater treatment facilities in the western United States.

The plant employs state-of-the-art liquids and solids treatment trains, including a post-aerobic digestion process and an innovative step-feed bioreactor system which improves nitrogen removal and operating flexibility, while requiring a significantly reduced physical footprint. Wastewater flows into the facility through a new seven-mile gravity-fed pipeline, which minimises pumping requirements and eliminates the need for seven existing lift stations.


The choice of a highly collaborative progressive design-build delivery model enabled the district and its partner CH2M to adhere to a tight construction schedule, all while realising significant capital savings. Despite the setbacks wrought by a one-in-a-hundred-year flood event at the low-lying site during construction, the $302 million treatment facility was delivered on time and $35 million under budget.


Ulu Pandan wastewater treatment pilot, Singapore

What is it?

A 12,500m3/d demonstration facility at Ulu Pandan, designed to pilot technologies for the new Tuas Water Reclamation Plant.

Who is involved?

A joint venture of Black & Veatch and AECOM designed the facility for Singapore’s Public Utilities Board (PUB). As the lead contractor Mitsubishi Corporation hired Mitsubishi Heavy Industries (MHI) to build the plant. Technology suppliers included Nordic, Suez WTS, and Lar Process Analyzers.

What makes it special?

PUB envisages the forthcoming Tuas WRP as the most energy-efficient membrane bioreactor (MBR) in the world, with a net process energy consumption target of 0.1kWh/m3, 2.5 times lower than a typical MBR. The Ulu Pandan pilot takes this dream several steps closer to reality. The biologically enhanced primary treatment system boosts COD capture to maximise biogas production downstream, while a step-feed MBR configuration – deploying Suez’s membranes and LEAPmbr aeration system – slashes energy requirements.

Intense space constraints in Singapore have forced PUB to target an ambitious land intensity of 0.04 ha/m3/d for the Tuas WRP. The decision to place a Lamella clarifier on top of a circular sludge collection system was truly inspired, radically reducing the footprint of the primary treatment process. Integrating the reverse osmosis polishing stage into the wastewater treatment plant is also groundbreaking for Singapore, drastically reducing the need for future NEWater production space.


The demo project is no less innovative on the automation front: it is a fertile testing ground for hundreds of advanced water quality analysers, including the first real-time BOD analyser in Singapore. Going forward, the operators are already planning to test in-basin nutrient removal, and to convert the MBR from a five- to a three-pass configuration to reduce construction costs – all of which underscores Singapore’s unparallelled reputation as a global hydrohub.


The Global Water Awards 2018 is proudly sponsored by:

Evoqua logo, links to Evoqua homepage

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