Ballast Water Articles

  • Ballast water treatment on Alaskan coastline - Case Study

    An Alaskan oil terminal had to deal with contaminated ballast water that needed to be collected and treated before discharge. They had a biological treatment process on site, but it was difficult to operate in the temperature and contaminant loading extremes the site experiences and they struggled to get it to work consistently. The plant is also required to treat spring snowmelt and rain that ...


    By QED Environmental Systems

  • Flocculation kinetics mechanism and floc formation prepared by poly aluminum chloride coupled with polyacrylamide for ship ballast water

    The performance of flocculants prepared by poly aluminum chloride (PAC) and polyacrylamide (PAM) on treating ballast water collected at the Dalian new port area, the evaluation depending on the values of reaction parameters, and kinetics mechanism of flocculation were investigated in this study. Accordingly, the flocculants of 0.1 g·L−1, prepared by mixing PAC of 10% with PAM of 2.0‰, enabled ...


    By IWA Publishing

  • The marine environment and ballast water management law

    This article contains a study of international and national measures dealing with the potential threat of pollution and the introduction of alien species that may come from the discharge of improperly treated ballast water. Ballast water management policy, law and coastal biosecurity strategies are considered. There are challenges to achieving the ideals of ballast water laws, as correctly ...


    By IWA Publishing

  • UV Ballast Water Treatment Close to US Approval

    Shipowners have found it increasingly difficult to comply with ballast water treatment regulations in the US. But there’s good news on the horizon thanks to DESMI’s newest UV-based solution Ultraviolet radiation (UV), which counters microorganisms by rendering them unable to reproduce, is the preferred method for today’s ballast water treatment systems. This robust and reliable ...


    By DESMI A/S

  • High Quality Pumps for Den Breejen Shipyard

    Since 1947 Den Breejen Shipyard in the Netherlands has produced high-quality vessels like passenger vessels, ferries, container and dry cargo ships, tankers, work boats and pontoons. River cruise vessels and ferries are specialties of Den Breejen and many DESMI pumps are onboard. DESMI Pumps are used for the following applications: ...


    By DESMI A/S

  • +30 Years of Pump Deliveries

    Zwets was established in 1953 and supplies pumps and valves for in-land shipping. Zwets is part of the SKB Group and is situated in Werkendam, the Netherlands. DESMI Pumps are used for the following applications: Ballast Cooling Pre-Lubrication ...


    By DESMI A/S

  • Evaluating non‐indigenous species management in a Bayesian networks derived relative risk framework for Padilla Bay, WA

    Many coastal regions are encountering issues with the spread of non‐indigenous species (NIS). In this study, we conducted a regional risk assessment using a Bayesian network relative risk model (BN‐RRM) to analyze multiple vectors of NIS introductions to Padilla Bay, Washington, a National Estuarine Research Reserve. We had three objectives in this study. The first objective was to determine ...


    By John Wiley & Sons, Ltd.

  • An evaluation of the residual toxicity and chemistry of a sodium hydroxide‐based ballast water treatment system for freshwater ships

    Non‐native organisms in the ballast water (BW) of freshwater ships must be killed to prevent the spread of invasive species. The ideal BW treatment system (BWTS) would kill 100% of BW organisms with minimal residual toxicity to organisms in receiving waters. The residual toxicity and chemistry of a BWTS was evaluated: sodium hydroxide was added to elevate pH to > 11.5 to kill BW organisms, ...


    By John Wiley & Sons, Ltd.

  • Canal sealing with Bentofix case study

    After the first pilot project installation of a geosynthetic clay liner (GCL) in a 1 km long section of the Havel-Oder-Waterway in 1997/98, approved by the local German Water and Ship Authority a second project followed shortly after. In a 500 m long section of the Dortmund-Ems-Canal a newly developed innovative GCL was installed under water. The installed GCL was Bentofix BZ 13-B, a ...


    By NAUE GmbH & Co.KG

  • Linking zebra mussel invasion and waterborne commerce in the USA

    The zebra mussel, a non-indigenous species in North American freshwater ecosystems, has received significant attention over the past two decades as a costly and damaging invader. In the USA, federal-, state-, and local-level policies designed to control and/or prevent the spread of this species remain flawed, in that they do not everywhere account for (or enforce regulations over) all potential ...


    By IWA Publishing

  • WP biological water purifier, decontamination from Germs & Bacteria

    WP water purifier WP has the power to decontaminate Water (sea- or freshwater) from Germs & Bacteria.  1. water from biological river / lakes can use for Drinkwater. we testet the results by a national unindependent laboratory, Report at attachment.  2. WP works also by ballast water in shiptanks from freight- or passenger ships. 4,5 - 6 € Euro ...


    By Oil Dissolver GmbH

  • On Site Bioremediation Of Oily Ballast Waters Of Ships and Tankers

    A poster presentation was made at the International Ballast Water symposium held in London, UK Paper discusses application of bioremediation products for ship board remediation of oily ballast water on ships and tankers and presents some case studies on bioremediation of industrial oily waste. Abstract Discharge of oily wasie ballast waier is a perpetual problem for most types of ...


    By Sarva Bio Remed, LLC

  • Effectiveness and potential environmental impact of a yeast-based deoxygenation process for treating ship ballast waters

    We assessed the effectiveness and potential environmental impact of a yeast-based deoxygenation process considered for treating ship ballast waters to reduce the risk of aquatic species introduction. Laboratory experiments were conducted to test three treatment concentrations (0.33%, 0.67% and 1.0% v v−1) at five temperatures (4, 10, 15, 20 and 25 °C) in both fresh- and saltwater, with ...


    By IWA Publishing

  • Effects of temperature on type approval testing of ballast water treatment systems

    In order to limit the risk associated with invasion of habitats by exogenous species, the International Convention for the Control and Management of the Ships' Ballast Water and Sediments was adopted in February 2004 and may soon enter into force. The International Maritime Organization (IMO) has produced guidelines to assess the efficacy and reliability of Ballast Water Treatment Systems ...


    By John Wiley & Sons, Ltd.

  • A grid for subgrade stability

    With research to back up quantifiable benefits and recognized design standards, the use of geogrids may be ready for wider acceptance among North American railroads. A product with a 20-year plus track record is rarely referred to as "new." However, this is a label those involved with geogrids find themselves tagged with when it comes to the prod¬uct's use on North American railroads. While ...

  • Efficient EHIDLighting - case study

    Spectacular white light Energy savings of 30% to 60% Doubled lamp life Reduced carbon footprint ENERáG’s proven lighting technology combines the spectacular white light of Metal Halide lamps with full controllability, providing dramatic energy and maintenance savings, and ensuring a quick return on investment. eHID Lighting – ...


    By ENER-G

  • Harmful algal blooms: new methods of control and management

    The general increase in eutrophication of waters and the changes in global climatic conditions have caused over the last 30 years the spread of algal blooms in seas all over the world. The paper describes the different aspects of this problem, the known classes of marine algal toxins and their effects on human activities, and the problem of ballast waters. New strategies of remote sensing ...


    By Inderscience Publishers

  • Effectiveness and Kinetics of Ferrate as a Disinfectant for Ballast Water

    The objective of the study was to determine whether ferrate could meet the international standards for successful ballast water treatment, including final concentrations of less than 1 CFU/ml of Enterococci, less than 2.5 CFUs/ml of Escherichia coli, and less than 1 CFU/100 mls of Vibrio cholerae. Pure cultures of Escherichia coli, Klebsiella pneumoniae, and V. cholerae, and a mixed culture of ...

  • Railroad Ballast Density Measurement

    Because existing methods were unsuitable for measuring the in-situ density of railroad ballast, studies were conducted to develop a new technique. A laboratory investigation was made of the various factors affecting the measurement of density in railroad ballast, which typically is composed of open-graded and coarse-grained aggregates. An approach employing water replacement in a lined hole was ...


    By ASTM International

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