Tag: Reverse Osmosis

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The Republic of Korea has recently funded a six-year US$ 170 million research initiative in seawater desalination. Over 500 researchers from 16 universities will contribute to the work of the 50-member core team. Government leaders funded the research initiative in part due to the success of South Korean multinational firms in the desalination export sector.…

High-flow cartridges provide safety filter solution for RO

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In recent years, considerable progress has been achieved in membrane technology in China. It has been widely used in many fields, including seawater desalination, power plants, metallurgic, petrochemical, and municipal and wastewater reuse. This article looks at the use of safety filters for RO systems and how a high-flow filter can avoid build-up of microorganisms…

Intake and pretreatment considerations for Coquina Coast

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While the attention of US desalination watchers has been focused primarily on Carlsbad and Huntington Beach on America’s west coast, on the east coast, plans for a similar-sized seawater desalination plant have been moving forward with much less fuss. The Coquina Coast Seawater Desalination Alternative Water Supply Project proposes a 50-80 MGD (189,000 m /d…

Reclaiming the grass at Pebble Beach golf course

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Tertiary treatment of wastewater has had a technology upgrade to improve play at Pebble Beach golf course, which recently hosted the US Open Championship. The problem was high sodium and total dissolved solids concentrations, and difficulties with reusing wastewater during low flows. Microfiltration followed by RO was selected to meet the water quality criteria. The…

Should we build any more MSF plants?

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Multi-stage flash (MSF) evaporator technology was for a long time the most popular technology for large seawater desalination plants. However, MSF has had to face strong competitors in recent years. Reverse osmosis (RO) and multi-effect distillation (MED) are squeezing MSF out of the market. Is there really a future for MSF? This article looks at…

Maltese desalination test-bed shows SalTec energy-recovery advantages

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Throughout the desalination industry, plant operators are looking for long-term solutions with lower lifecycle cost because of the link between water costs and energy costs. In order to meet operators’ demands and requirements, equipment manufacturers are investing considerable resources in the development of new technologies that will reduce energy costs. The Water Services Corporation in…

UF solution to rural water supplies?

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Sub-Saharan Africa is not a region generally associated with membrane technology, but that is now changing. Desalination projects are already appearing in, for example, South Africa and Ghana, and South Africa is fast developing its own technologies. Water treatment manufacturer Ikusasa is developing its own UF modules both for rural water supply and for desalination…

Experience of ten years running the Okinawa desalination plant

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At its inception, in February 1995, the Okinawa seawater reverse-osmosis (SWRO) desalination plant in southern Japan was the most advanced of its type. In March 1997, the plant’s full capacity of 40,000 m /d was completed and began full operation. Now, the desalination plant is an essential water-supply facility for Okinawa. For this reason, looking…

UF Pretreatment For Cold Seawater RO

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The main obstacle to the use of UF membranes for SWRO pretreatment has always been the high operating cost. This paper describes operational experience of pilot projects using a new membrane designed for the lowest whole-life cost while enabling the most difficult seawater to be treated using membrane desalination. This article shows how the project…

Sydney’s SWRO desalination project – working towards sustainability

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