scholarly journals Application of Hydrocyclone and UV Radiation as a Ballast Water Treatment Method

1970 ◽  
Vol 22 (3) ◽  
pp. 183-191 ◽  
Author(s):  
Željko Kurtela ◽  
Pavao Komadina
Keyword(s):  
Water Treatment ◽  
Uv Radiation ◽  
Ballast Water ◽  
Pilot Plant ◽  
Treatment Method ◽  
Hydrodynamic Forces ◽  
Treatment Methods ◽  
Ballast Water Treatment ◽  
International Regulations ◽  
Scientific Opinion

The ballast water exchange methods in open sea are, for the time being, the prevailing procedures accepted by shipowners. However, such methods do not guarantee full efficacy in elimination of allochthonous organisms. Besides, in some navigation zones, in particular in the closed seas, not even the criteria prescribed by international regulations can be fulfilled, i.e. the position of a ship exchanging ballast must be farther than 200Nm from the shore (alternatively 50Nm) at the sea depth exceeding 200m. Numerous research attempts on various treatment methods lead to the conclusion that there is still no scientific opinion on the final choice of methods for wide application on board. The treatment methods, such as hydrocyclone separation in the first stage and UV radiation in the second stage, stand a good chance for application on board. Advantages of such a combined method are in the very application of treatment that can be performed during all stages of ballast water treatment, i.e. loading ballast, voyage in ballast and discharging ballast. In closed seas and on shorter routes the operational advantages of hydrocyclone and UV radiation could be the prevailing factor for application. Within the research on the possible application of ballast water treatment by hydrocyclone and UV radiation, a pilot plant with hydrocyclone cluster and UV device was constructed. The research carried out on the pilot plant installed on board the m/v ‘’Naše more’’ proved the effectiveness of such ballast water treatment method and offered a new approach in using hydrocyclone for the inactivation of organisms by hydrodynamic forces. This approach has largely increased the efficacy of the device and a new method for utilization of hydrocyclone in ballast water treatment on board has been discovered. KEY WORDS: ballast water treatment, hydrocyclone, UV radiation, application of method, pilot plant, hydrodynamic forces

Underwater Spatial Distribution of UVC Radiant Intensity in Different Water Environment for Ballast Water Treatment

2013 ◽  
Vol 448-453 ◽  
pp. 630-633
Author(s):  
Man Xia Zhang ◽  
Ya Long Liu ◽  
Cheng Yu Yuan ◽  
Yi Min Zhu
Keyword(s):  
Spatial Distribution ◽  
Water Treatment ◽  
Uv Radiation ◽  
Ballast Water ◽  
Tap Water ◽  
Water Environment ◽  
Radiant Intensity ◽  
Bacteria Inactivation ◽  
Ballast Water Treatment ◽  
Influence Of Water

UV radiation, as an effective method for bacteria inactivation, has been applied popularly on ballast water treatment. However, the inactivation efficiencies of UV radiation greatly depend on the UV intensity which distributed unevenly in water and can be deeply affected by the suspending particles in water. For better understanding of the spatial distribution of UV radiation, a 16W UVC lamp was measured underwater to detect the radiant intensity over horizontal and vertical distance. The distribution tendency of UV radiant intensity was probed behind large amounts of experimental data. In addition, four types of different water including tap water, clean seawater, seawater mixed with suspending substances (SS), and seawater mixed with typical algae, were studied to identity the influence of water environment on UV transmission. The impacting significances were compared among different water quality, to optimize the ballast water treatment methods combining with UV radiation.

Micro-pore Ceramic Filter and UV System as Ballast Water Treatment: Preliminary Study on Chlorella Removal and Bacteria Inactivation

2008 ◽  
Vol 11 (1) ◽  
Author(s):  
Manxia Zhang ◽  
Ningwei Xu ◽  
Chang li Li ◽  
Yatong Wang ◽  
Yimin Zhu
Keyword(s):  
Water Treatment ◽  
Uv Radiation ◽  
Ballast Water ◽  
Ceramic Filter ◽  
Flow Rates ◽  
Bacteria Inactivation ◽  
Combination System ◽  
Ballast Water Treatment ◽  
Preliminary Study ◽  
Ceramic Filtration

AbstractA combination system of micro-pore ceramic filtration and UV radiation was built up for ballast water treatment. Two treatment methods, single micro-pore ceramic filtration and micro-pore filtration and UV radiation, were studied in the research, respectively. Chlorella removal rates and total oceanic bacteria inactivation rates were measured at different flow rates (0.6 ~ 4.7 m

An Overview of Ballast Water Treatment Methods

2005 ◽  
Author(s):  
D. K. McCluskey ◽  
A. E. Holdo̸ ◽  
R. K. Calay
Keyword(s):  
Water Treatment ◽  
Ballast Water ◽  
Economic Cost ◽  
Development Stage ◽  
Management Technique ◽  
Treatment Methods ◽  
Treatment Techniques ◽  
Ballast Water Treatment ◽  
Key Factor ◽  
Marine Vessels

One of the greatest threats to the world’s oceans is the transfer and potential introduction of harmful organisms in environments to which they are not indigenous. Ballast water deposited by marine vessels has been identified as a key factor responsible for this transfer and introduction. The significance of transferral of species has led to diverse research and development into ballast water treatment methods. However, despite the number of ballast water management techniques in development, at present the exchange of ballast water in open oceans is the only management technique widely used. This paper provides an overview of Ballast Water Treatment techniques currently at a research or development stage. An assessment of the potential effectiveness of each method, its corrosion implications and economic cost are all presented together with preliminary recommendations and an outline of future work.

scholarly journals ANALYSIS INTO THE SELECTION OF A BALLAST WATER TREATMENT SYSTEM

Transport ◽  
2015 ◽  
Vol 30 (2) ◽  
pp. 145-151 ◽  
Author(s):  
Diana Šateikienė ◽  
Jolanta Janutėnienė ◽  
Marijonas Bogdevičius ◽  
Rima Mickevičienė
Keyword(s):  
Water Treatment ◽  
Ballast Water ◽  
Sea Water ◽  
Treatment Method ◽  
Quality Parameters ◽  
Design Stage ◽  
Technical Equipment ◽  
Technical Parameters ◽  
Ballast Water Treatment ◽  
Treatment Equipment

Today, it is very important to select and install the optimal equipment for the treatment of ballast water in existing ships. Increasing cargo volumes demand for a greater number of ships for transportation and expanded navigation geography as well as result in increased amount of discharged ballast water. Consequently, sea water pollution is increasing and invasive microorganisms appear that the existing flora and fauna are unaccustomed to. In order to protect territorial waters from these invasive species, International Maritime Organization (IMO) requirements have been implemented that regulate the quality parameters of discharged ballast water from ships. This problem has become particularly relevant for operational ships, in which ballast water treatment equipment and technical solutions had not been anticipated in the design stage. This article provides a comparative analysis of the treatment equipment of ballast water and the related technical parameters, in order to distinguish the most important equipment criteria. A Carrier, according to its technical characteristics, was analysed together with the water treatment method for operated bulk. An expert evaluation for the characteristics of the technical equipment was established.

Sign in / Sign up

Export Citation Format

Share Document