Seawater Treatment Articles

  • Horizon and water treatment

    Horizon is an environment company focused on water treatment.In the latest years,with the improvement of industrial economy,water quality is becoming worse and worse.To prevent the pollution trend,our government has raised the standard of sewage discharge several times,so traditional process and technology of water treatment can’t apply for the environmental requirements and ...


    By Horizon Water Co., Ltd.

  • Disinfection effect of pressurized carbon dioxide on Escherichia coli and Enterococcus sp. in seawater

    Ship ballast water should be disinfected before being discharged into the ocean to avoid the dispersal of non-native species into the marine environment. This study presents the results of using pressurized carbon dioxide (CO2) at less than 1.0 MPa for inactivating Escherichia coli and Enterococcus sp. in artificial seawater (3.4% salinity). The bactericidal ...


    By IWA Publishing

  • Seawater desalination with solar-energy-integrated vacuum membrane distillation system

    This study designed and tested a novel type of solar-energy-integrated vacuum membrane distillation (VMD) system for seawater desalination under actual environmental conditions in Wuhan, China. The system consists of eight parts: a seawater tank, solar collector, solar cooker, inclined VMD evaporator, circulating water vacuum pump, heat exchanger, fresh water tank, and brine tank. Natural ...


    By IWA Publishing

  • YWP Weinrich perspective on RO membrane biofouling reduction

    Seawater desalination using reverse osmosis is an important part of a community’s water portfolio in coastal areas experiencing water scarcity. However, desalination using RO is expensive in part because of the costly challenges that arise from fouling on the RO membranes. Specifically, biological fouling emerged as the most poorly managed of the different types of fouling. My literature ...


    By IWA Publishing

  • Isolation of high-salinity-tolerant bacterial strains, Enterobacter sp., Serratia sp., Yersinia sp., for nitrification and aerobic denitrification under cyanogenic conditions

    Cyanides (CN−) and soluble salts could potentially inhibit biological processes in wastewater treatment plants (WWTPs), such as nitrification and denitrification. Cyanide in wastewater can alter metabolic functions of microbial populations in WWTPs, thus significantly inhibiting nitrifier and denitrifier metabolic processes, rendering the water treatment processes ineffective. In this study, ...


    By IWA Publishing

  • Simulation of seawater intrusion in the Nile Delta aquifer under the conditions of climate change

    The problem of seawater intrusion is encountered in almost all coastal aquifers. Because of its higher density, the seawater migrates inland into freshwater aquifers even without any pumping activities. Excessive pumping of groundwater would accelerate seawater intrusion. Climate change and sea level rise represent critical parameters affecting the rate and degree of seawater intrusion. In ...


    By IWA Publishing

  • Mitigation of marine biofouling on tubes of open rack vaporizers using electromagnetic fields

    This study quantitatively evaluates the antifouling action of the continuous physical treatment with electromagnetic fields (EMFs) of seawater used as heat exchanger fluid in an open rack vaporizer (ORV) pilot plant to reduce the growth of biofouling on external rib-tube surfaces. The results demonstrate that the biofilm adhered on the treated rib-tubes was reduced by 33% in thickness and by ...


    By IWA Publishing

  • Results from 99 seawater ro membrane autopsies

    Abstract This paper presents results from 99 sea water reverse osmosis (SWRO) membrane autopsies carried out by the Genesys laboratory in Madrid from 2002 and outlines the technical issues surrounding fouling and scaling of sea water membranes. The authors discuss historical results of membrane autopsies and link recent trends and changes in plant design to potential fouling and ...

  • Role of hydrogeochemical process in increasing groundwater salinity in the central Godavari delta

    Groundwater salinization is an ever increasing problem in coastal aquifers due to seawater intrusion resulting from excessive groundwater withdrawals, lithological conditions of the aquifer and industrial and agriculture pollutant loads. Identification of salinity sources is challenging and a prerequisite for the protection of coastal fresh water aquifers. The present aim of the study is to ...


    By IWA Publishing

  • Desalination of simulated seawater by purge-air pervaporation using an innovative fabricated membrane

    An innovative polymeric membrane has been invented, which presents a breakthrough in the field of desalination membranes. It can desalinate simulated seawater of exceptionally high concentration to produce a high flux of potable water with over 99.7% salt rejection (%SR) in a once-through purge-air pervaporation (PV) process. A set-up was constructed for conducting the desalination ...


    By IWA Publishing

  • OptiSaveTM installation for sea and freshwater pumps onboard “Johann Jacob”

    Ernst Jacob (GmbH & Co KG) - a German ship manager and owner of 11 ships all providing safe and environmentally friendly service of consistent quality - decided to save as much energy as possible. DESMI has signed an agreement to continuous install the energy saving system OptiSaveTM on board all the 11 vessels of Ernest Jacob. The Challenge “Back in 2014 the fuel ...


    By DESMI A/S

  • Bioconcentration and depuration of 14C‐labeled 17‐α‐ethinyl estradiol and 4‐nonylphenol in individual organs of the marine bivalve, Mytilus edulis L.

    Endocrine Disrupting Compounds (EDCs), including 17‐α‐ethinyl estradiol (EE2) and 4‐nonylphenol (4‐NP), enter coastal environments primarily in effluents of wastewater treatment facilities, and have become ubiquitous in marine surface waters, sediments and biota. Although EE2 and 4‐NP have been detected in marine shellfish, the kinetics of bioconcentration and their tissue distribution have ...


    By John Wiley & Sons, Ltd.

  • The operation principle of the Hadera seawater desalination plant and advantages of the pressure center design

    Abstract The Hadera Desalination Plant located in Hadera, Israel, is the world’s largest operating seawater reverse osmosis desalination plant. During the three and a half years it has been in operation, the plant has produced potable water for the State of Israel totaling 106 million cubic meters per year the first year, 127 million cubic meters per year the second year and 146 ...


    By IDE Technologies

  • Pump Contract for MARS Tanker. Logistic Support Ship - Case Study

    In 2010 following many months of dialogue with BMT Naval Architects the initial purchase enquiry for the supply of pumps and systems for the 4 new logistic support ships for the U.K RFA (Royal Fleet Auxiliary) was received from the Korean Shipyard DSME. DESMI participated in the tender process from the very beginning and had an open and honest dialogue with both the ...


    By DESMI A/S

  • DESMI Lifts Green Ship Business Case

    New rules call for fresh approach It’s hardly news that the shipping industry is mobilising to meet the demands of wave after wave of new environmental regulations. From the IMO’s ballast water management legislation to EEDI (the Energy Efficiency Design Index for new ships) and SEEMP (Ship Energy Efficiency Management Plan), shipowners need to be ready to drastically cut ...


    By DESMI A/S

  • Impact of over-pumping and sea level rise on seawater intrusion in Gaza aquifer (Palestine)

    Seawater intrusion is considered as one of the main processes that degrade water quality by raising salinity to levels exceeding acceptable drinking water standards. Over-abstraction is the main cause of seawater intrusion. Moreover, climate change and sea level rise speed up seawater intrusion. This paper presents the development of a coupled transient finite element model for simulation of ...


    By IWA Publishing

  • Pumps for the Booming FPSO Sector

    In the last few years, several new offshore oil fields have been discovered. The current findings from Petrobras and other companies in the pre-salt province, located in the Brazilian continental shelf, suggest reserves of over 50 billion barrels of oil. Extracting the pre-salt oil is challenging and done increasingly with floating production storage and offloading units (FPSOs). Sulzer offers a ...


    By Sulzer

  • Nanofiltration technology in water treatment and reuse: applications and costs

    Nanofiltration (NF) is a relatively recent development in membrane technology with characteristics that fall between ultrafiltration and reverse osmosis (RO). While RO membranes dominate the seawater desalination industry, NF is employed in a variety of water and wastewater treatment and industrial applications for the selective removal of ions and organic substances, as well as certain niche ...


    By IWA Publishing

  • Cost comparison of seawater for toilet flushing and wastewater recycling

    As freshwater resources are becoming increasingly scarce, unconventional sources of water should be given new consideration. In coastal cities, seawater, with minimal treatment, can be used for toilet flushing, reducing the demand for freshwater. Currently, it is practised on a large scale only in Hong Kong. This study estimates the cost of seawater flushing and compares it to the cost of ...


    By IWA Publishing

  • The effects and control of viscosity loss of polymer solution compounded by produced water in oilfield development

    To avoid the environment pollution and remit the pressure of produced water stored up in water stations at high–water–cut stage, a special technology of enhanced oil recovery (EOR), in which produced water is used for compounding polymer solution, has been formed in Daqing Oilfield. However, the viscosity loss is difficult to be avoided only by modifying the polymer production. Then the effects ...


    By Inderscience Publishers

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