Category: Desalination

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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…

Algerian Desalination Market Developments

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In the current market situation, where the financial crisis has frozen most project finance, Algeria maintains its commitments to develop a desalination infrastructure and continues to pursue a milestone program of desalination capacity building which sits among the most ambitious in industry history. By 2011, 13 seawater desalination projects with a total capacity of 2.26…

Small-scale desalination approach to a big water problem

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A research project recently undertaken at the Massachusetts Institute of Technology has revealed a new mechanism for desalination/purification of water, employing a microfluidic channel-network system, which could lead to the development of small and portable units. The authors have started to build a prototype device in the laboratory in order to demonstrate the necessary scale-up…

Antiscalant removes need for acid in wastewater RO

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Field trials of a new scale-inhibiting chemical for use with reverse-osmosis membranes in wastewater reuse plants show that, at a low dose rate, it can increase the solubility of calcium phosphate by over one hundred times, obviating the need for using dangerous and costly acid. Current design practices for large effluent reuse projects are focused…

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…

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…

Doing away with RO energy-recovery devices

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Energy-recovery devices have been a crucial element in the reduction of the cost of desalination during the past decade, bringing the technology within reach of conventional water resources costs in certain circumstances. Typical energy consumption for seawater reverse osmosis (SWRO) is now around 2.5 kWh/m . Desalitech’s Closed Circuit Desalination, which does away with an…

MBR upgrades mean less maintenance and longer life

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In recent years, MBR membranes have evolved to the point where they require less maintenance and at the same time have a longer useful life. An added benefit comes from the more advanced designs that consume significantly less energy and lower operating costs. The new Puron module from Koch Membrane Systems Inc (KMS) is a…

Ozone improves ceramic membrane use for wastewater reclamation

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Ceramic membranes have been used in the industrial production of beer, wine and cheese. One of the reasons for this use is the narrow pore size distribution, where careful separation of different size compounds can be achieved. Outside of Japan, the use of ceramic membranes has been almost non-existent for municipal drinking-water systems. The slow…

Should we build any more MSF plants?

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