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Case study

Zero liquid discharge at municipal scale

Treating 10,800 m³/day of CCRO® brine at 36,772 mg/L TDS to over 200,000 mg/L, in a footprint 70% smaller than conventional systems, for the world’s largest urban park.

Brine treated
10,800m³/day
Water recovery
82%
Smaller footprint
70%
Energy reduction
50%
Client
Wetico & Albawani Joint Venture (WBJV)
Location
King Salman Park, Riyadh, Saudi Arabia
Sector
Municipal
Published
Technology
SAMRO™ · MBC™
Wetico & Albawani Joint Venture (WBJV), King Salman Park, Riyadh, Saudi Arabia

Illustrative render of the underground installation; the train is in construction.

The challenge

King Salman Park is a 16 km² development, the largest urban park in the world, in a country with no surface water to spare. The park needed to treat 10,800 m³/day of CCRO® brine with high TDS levels of approximately 36,772 mg/L, from treated sewage effluent.

  • Process variable brine solutions containing elevated mineral concentrations, including calcium (1,414 mg/L), magnesium (1,211 mg/L), and chloride (15,867 mg/L), along with significant organic content (BOD 400 mg/L, COD 800 mg/L)
  • Maintain consistent output water quality standards suitable for park irrigation
  • Achieve near-zero liquid discharge at municipal scale
  • Design a compact system compatible with underground installation

The solution

Osmosys, partnering with Power Line Solutions for the Wetico & Albawani Joint Venture (WBJV), is implementing an integrated water treatment system across three stages.

The white paper's design basis. Stream flags on the drawing match the rows of the table below, as on the project's flow sheet.

Osmosys membrane scope1234CCRO® brine36,772 mg/L TDS10,800 m³/dayPretreatmentScreening · clarifierAPO · ultrafiltrationSAMRO™Adaptive HP pump · loop→ 100,000 mg/LMBC™Brine concentrator→ 200,000+ mg/LCrystallizationResidue to solidsRecovered water82% of feedto park irrigation5Solid saltsBy-product6
  1. 01CCRO® brine36,772 mg/L TDS · 10,800 m³/day
  2. 02Pretreated brinesuspended solids & organics removed
  3. 03SAMRO™ concentrate100,000 mg/L · single stage, energy recovery
  4. 04MBC™ concentrate200,000+ mg/L · high-osmotic-pressure membranes
  5. 05Recovered water82% of feed, irrigation grade
  6. 06Solid saltscrystallizer by-product
Process flow diagram with stream table
StreamNameDetail
1CCRO® brine36,772 mg/L TDS · 10,800 m³/day
2Pretreated brinesuspended solids & organics removed
3SAMRO™ concentrate100,000 mg/L · single stage, energy recovery
4MBC™ concentrate200,000+ mg/L · high-osmotic-pressure membranes
5Recovered water82% of feed, irrigation grade
6Solid saltscrystallizer by-product

This treatment train achieves an 82% water recovery rate while operating in a footprint 70% smaller than conventional systems, making it suited to the underground installation requirements at King Salman Park.

Results

Pilot testing on the actual feed established the recovery, energy, and footprint figures the commercial design is built on.

  • Irrigation-grade water returned for the park's planting program
  • Liquid discharge volume cut by more than 82%
  • Specific energy 50% below a thermal train on the same duty
  • Feed variation absorbed by adaptive process controls

Under execution with Power Line Solutions: construction and fabrication are underway.

A first read on your stream

Send the flow, the chemistry, and the target. A process engineer replies with a first read on recovery, energy, and the train worth piloting.

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