Study on marine bacteria inactivation of ballast water by combination of micro-pore ceramic filtration and UV radiation

2011 ◽  
Author(s):  
Manxia Zhang ◽  
Shengjie Liu ◽  
Xiaojia Tang ◽  
Lili Wang ◽  
Yimin Zhu
Keyword(s):  
Uv Radiation ◽  
Marine Bacteria ◽  
Ballast Water ◽  
Bacteria Inactivation ◽  
Ceramic Filtration

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

Study on Marine Bacteria Inactivation by UV Radiation Combined with Multi-pore Ceramic Filtration

2012 ◽  
Vol 15 (2) ◽  
Author(s):  
Manxia Zhang ◽  
Xiaojia Tang ◽  
Xiaomei Wu ◽  
Na Li ◽  
Ran Yu ◽  
...  
Keyword(s):  
Uv Radiation ◽  
Marine Bacteria ◽  
Transmission Rate ◽  
Economic Feasibility ◽  
Uv Treatment ◽  
Experimental Conditions ◽  
Bacteria Inactivation ◽  
Low Efficiency ◽  
Uv Dose ◽  
Ceramic Filtration

AbstractUV is one of well-established ways to deal with bacteria in water. However, when applying on marine bacterium inactivation in ballast water, it shows low efficiency due to the existence of large amounts of plankton. To recover high transmission rate of seawater, plankton are required to be removed before UV radiation. Considering technical and economic feasibility, a novel method of multi-pore ceramic filtration (MPCF) is used as a primary treatment before UV radiation. The study compared UV treatment with MPCF & UV treatment at different flow rates and alga concentrations. The results showed that less than 40% marine bacteria can be inactivated by single UV radiation for the existence of large amounts of algae, while up to 100% inactivation rates were observed by MPCF & UV treatment at high alga concentration. According to the results of orthogonal tests, optimal experimental conditions including UV dose were detected. With the combination of MPCF, lethal UV dose for marine bacteria inactivation can reduce to 8 mW·s·cm

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.

Kinetics of bacteria inactivation employing UV radiation under clear water conditions

2006 ◽  
Vol 121 (2-3) ◽  
pp. 135-145 ◽  
Author(s):  
M LABAS ◽  
R BRANDI ◽  
C MARTIN ◽  
A CASSANO
Keyword(s):  
Uv Radiation ◽  
Clear Water ◽  
Bacteria Inactivation ◽  
Water Conditions ◽  
Kinetics Of

Material Study for Porous Ceramic Filtration Applied on Ballast Water Treatment

2013 ◽  
Vol 721 ◽  
pp. 229-232
Author(s):  
Man Xia Zhang ◽  
Qing Xue ◽  
Xiao Jia Tang ◽  
Yi Min Zhu
Keyword(s):  
Water Treatment ◽  
Ballast Water ◽  
Evaluation System ◽  
Material Selection ◽  
Porous Ceramic ◽  
Combination Method ◽  
Oxide Ceramic ◽  
Filter Performance ◽  
Ballast Water Treatment ◽  
Ceramic Filtration

For urgent requirement of onboard ballast water treatment, a combination method of wall-flow structure porous ceramic filtration (PCF) and UV radiation has been prompted and studied systematically in the lab. The paper mainly forcuses on the material selection for PCF in order to obtain a more effective, operational, durable and economic treatment. Hence four types of ceramic materials were compared, and a series of experiments were arranged to test alga removal efficiency, durability and differential pressure of the filters. A fuzzy comprehensive evaluation system was set up to assess filter performance from five aspects. The normalization results show that oxide ceramic wins carbide ceramic at three major fators: resistance, durability and cost.

scholarly journals UV radiation increases the reduced coenzyme Q ratio in marine bacteria

Redox Report ◽  
2002 ◽  
Vol 7 (5) ◽  
pp. 320-323 ◽  
Author(s):  
Walter C. Dunlap ◽  
Akio Fujisawa ◽  
Yorihiro Yamamoto
Keyword(s):  
Uv Radiation ◽  
Marine Bacteria ◽  
Coenzyme Q
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