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Case study

King Salman Park: 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.

Rendering of the treatment facility at King Salman Park, Riyadh, Saudi Arabia
Brine treated
10,800m³/day
Water recovery
82%
Smaller footprint
70%
Energy reduction
50%

Project

  1. Client

    Wetico & Albawani Joint Venture (WBJV)

  2. Location

    King Salman Park, Riyadh, Saudi Arabia

  3. Technology

    SAMRO, MBC

  4. Status

    In execution

The challenge

King Salman Park is a 16 km² development in Riyadh, the largest urban park in the world. Its treated-sewage-effluent system produces 10,800 m³/day of CCRO® brine at about 36,772 mg/L TDS, which had to be treated to irrigation quality with near-zero discharge, underground.

  1. Variable chemistry

    Calcium 1,414 mg/L, magnesium 1,211 mg/L, chloride 15,867 mg/L, with BOD 400 mg/L and COD 800 mg/L.

  2. Irrigation quality

    Consistent output water quality for the park's planting program.

  3. Near-zero discharge

    At municipal scale, from a brine already concentrated by CCRO®.

  4. Underground plant

    A compact footprint compatible with installation below the park.

The solution

Osmosys, with Power Line Solutions, is delivering an integrated train for the Wetico & Albawani joint venture: pretreatment, SAMRO concentration to 100,000 mg/L in a single stage, and the MemBrine Concentrator to more than 200,000 mg/L ahead of crystallization.

Project design basis. Stream numbers on the drawing correspond to the table below.

Osmosys membrane scope1234CCRO® brine36,772 mg/L TDS10,800 m³/dayPretreatmentScreening · clarifierAPO · ultrafiltrationSAMROAdaptive HP pump · loop→ 100,000 mg/LMBCBrine 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

Results

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

  1. 82% water recovery

    Irrigation-grade water returned to the park.

  2. 50% lower energy

    Specific energy against a thermal train on the same duty.

  3. 70% smaller footprint

    Than a conventional system, enabling underground installation.

  4. Adaptive control

    Feed variation absorbed by SAMRO process controls.

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