ARA Petroleum · HELIOVIS · Produced Water Pilot

Qarat al Milh

Oman

At Qarat al Milh, ARA Petroleum E&P, HELIOVIS AG, and Trevi Systems announced mechanical completion and commissioning of a joint pilot in August 2024: a solar-thermal field, heat storage, and Trevi's forward-osmosis process.

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The pilot

Scope of the Field Test

ARA Petroleum E&P, HELIOVIS AG, and Trevi Systems combined a HELIOVIS solar-thermal field, thermal storage, and a containerized Trevi forward-osmosis train at Qarat al Milh.

The pilot concentrates hypersaline produced water using stored solar heat.

Location
Qarat al Milh, Oman
Project parties
ARA Petroleum E&P · HELIOVIS AG · Trevi Systems
Milestone
Mechanical completion and commissioning announced August 2024
Design target
Approximately 1,000 bbl/day of produced-water feed; up to 140 m³/day of freshwater

Figures are published design statements.

Containerized Trevi pilot beside solar-thermal collectors at Qarat al Milh, Oman
Qarat al Milh pilot · HELIOVIS solar-thermal tubes and the containerized Trevi forward-osmosis unit
Inside the pilot · Solar field · Storage · FO train

Three Systems in One Thermal Loop

HELIOVIS solar collectors feed thermal storage, which carries the process beyond daylight hours while FO separates water from a hypersaline produced-water stream.

  1. 01

    Solar field

    The HELIOVIS collector field operates at approximately 180°C.

  2. 02

    Thermal storage

    Storage is designed to support continuous operation beyond solar hours.

  3. 03

    Forward osmosis

    The design target is 50% further brine concentration (ARA announcement).

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Design sequence

From Solar Heat to Reduced Brine

Each subsystem serves a defined duty.

  1. 01

    Collect heat

    HELIOVIS tubes heat the solar loop to approximately 180°C.

  2. 02

    Store heat

    Thermal storage is designed to support operation beyond solar hours.

  3. 03

    Transfer water

    Trevi FO moves water into the draw solution while retained salts remain in the feed-side concentrate.

  4. 04

    Recover and route

    The design takes a produced-water feed of approximately 1,000 bbl/day, targeting up to 140 m³/day of freshwater and 50% further concentration of the hypersaline stream.

Published source · ARA announcement

What Was Announced

ARA announcement · August 2024

Published design basis

ARA's announcement records mechanical completion and commissioning at Qarat al Milh.

PublishedMilestone
Mechanical completion and commissioning announced
ARA Petroleum
AttributedProduced-water feed
Approximately 1,000 bbl/day
Trevi Systems
DesignFreshwater output
Up to 140 m³/day
ARA Petroleum
DesignConcentration statement
50% further concentration of hypersaline produced water
ARA Petroleum
DesignSolar field
Storage temperature of approximately 180°C
ARA / HELIOVIS
Not publicSustained dataset
No public sustained-performance dataset available

Figures are design statements, not measured performance.

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Next step · Chemistry · Flow · Heat · Outlet

Every produced-water stream carries its own chemistry, temperature, and disposal constraints. Start with a feed review.

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Oman Produced Water Pilot · Solar Forward Osmosis | Trevi Systems