According to the refinery's public relations office, the ZLD package,
now in its final phase of operation, includes advanced technologies such as
clariflocculators, sand filters, ultrafiltration units, reverse osmosis (RO)
systems, and decanters for sludge dewatering. These technologies work in
synergy to achieve a recycling efficiency of 97%, reducing wastewater discharge
to nearly zero.
In the final stage of the process, the ZLD unit treats high-hardness
wastewater with more than 80,000 ppm, producing purified water for industrial
use while isolating dry salt. Previously discharged wastewater streams,
including blowdown from boilers, cooling towers, and RO systems, are now fully
recycled into the refinery’s industrial water system, with only 3% remaining as
unrecoverable crystallized salt and sludge.
Executed under an EPCC contract with Middle East Absan Energy, the
project aligns with international standards and underscores the company’s
commitment to environmental sustainability. By eliminating the need for
evaporation ponds, the system significantly reduces environmental impact while
safeguarding water resources.
This project, part of Bidboland Persian Gulf Gas Refinery’s broader
environmental initiatives, supports sustainable development and resource
conservation in Iran. Following rigorous performance and operational testing,
the ZLD package was officially launched in February 2025, coinciding with the
refinery's fourth anniversary.