scholarly journals Necessity of Combination of Porous Ceramic Filtration and UV Radiation on Marine Bacteria Inactivation

2015 ◽  
Author(s):  
Manxia Zhang ◽  
Chengyu Yuan ◽  
Yan Yan ◽  
Wen Shi ◽  
Yimin Zhu
Keyword(s):  
Uv Radiation ◽  
Marine Bacteria ◽  
Porous Ceramic ◽  
Bacteria Inactivation ◽  
Ceramic Filtration

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

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

DEVELOPMENT OF CONTINUOUS ANTI-SOLVENT RECRYSTALLIZATION METHOD TO PRODUCE CEFTRIAXONE SODIUM NANO CRYSTALS INJECTION USING CERAMIC FILTRATION

2021 ◽  
Vol 74 (9) ◽  
pp. 2323-2336
Author(s):  
Firas Aziz Rahi ◽  
Krar Kadhim Mj
Keyword(s):  
Particle Size ◽  
Water Purification ◽  
Porous Ceramic ◽  
Ceramic Filter ◽  
Dissolution Time ◽  
Mixing Rate ◽  
Ceftriaxone Sodium ◽  
Continuous Recrystallization ◽  
Ceramic Filtration ◽  
Clear Solution

The aim: In this work we developed a method of continuous recrystallization to meet industrial requirements. Materials and methods: Continuous recrystallization method was investigated using porous ceramic filter for water purification with pour size less than 1 μm, that ensures high mixing rate of ethanol and water. Results and conclusions: The results of experiments using crystallization through ceramic filter, gives superior products in particle size, and produced needle shaped ceftriaxone crystals form, that showed significant improvement in dissolution time and obtained ceftriaxone sodium powder to be reconstituted in injectable formula that give clear solution without insoluble microparticles.

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

scholarly journals Comparison of indicator bacteria inactivation by the ultraviolet and the ultraviolet/hydrogen peroxide disinfection processes in humic waters

2011 ◽  
Vol 9 (4) ◽  
pp. 659-669 ◽  
Author(s):  
Arzu Teksoy ◽  
Ufuk Alkan ◽  
Sevil Çalışkan Eleren ◽  
Burcu Şengül Topaç ◽  
Fatma Olcay Topaç Şağban ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Fulvic Acid ◽  
Uv Radiation ◽  
Surface Waters ◽  
Uv Light ◽  
Indicator Bacteria ◽  
E Coli ◽  
Bacteria Inactivation ◽  
Potential Indicator ◽  
Test Organisms

The aim of the present study was to evaluate responses of potential indicator bacteria (i.e. Escherichia coli, Pseudomonas aeruginosa, Bacillus subtilis) to the ultraviolet (UV) radiation and the UV/hydrogen peroxide (H2O2) disinfection processes of surface waters with different qualities in terms of humic content. The UV and the UV/H2O2 processes were applied to waters containing various concentrations of fulvic acid in order to inactivate E. coli, P. aeruginosa and B. subtilis spores. Three fulvic acid (0, 2 and 6 mg l−1) and four H2O2 (0, 10, 25 and 50 mg l−1) concentrations were used. Results showed that the k values of E. coli, P. aeruginosa and B. subtilis spores varied between 2.22 and 4.00, 1.73 and 3.58, and 1.40 and 1.86, respectively, in all test conditions. The sensitivity of the test organisms followed a decreasing order of E. coli > P. aeruginosa > B. subtilis. Results of the study indicated that the blocking effect of fulvic acid for the UV light was diminished by using H2O2 in combination with the UV radiation. Findings of the present study strongly suggested that the UV/H2O2 process was significantly effective on the inactivation of E. coli and P. aeruginosa in humic waters, whereas it induced little or no apparent contribution to the disinfection efficiency of B. subtilis spores.

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.

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