Ballast Water Treatment by Using Porous Ceramic Filter and UV Radition Combination

2012 ◽  
Author(s):  
Xia-Zhang Man ◽  
Li Na ◽  
Mei-Wu Xiao ◽  
Yu Ran ◽  
Min-Zhu Yi ◽  
...  
Keyword(s):  
Water Treatment ◽  
Ballast Water ◽  
Porous Ceramic ◽  
Ceramic Filter ◽  
Ballast Water Treatment

Prediction for Algae Removal Efficiencies of Porous Ceramic Filter on Ballast Water Treatment

2013 ◽  
Vol 448-453 ◽  
pp. 425-428
Author(s):  
Man Xia Zhang ◽  
Yan Ma ◽  
Cheng Yu Yuan ◽  
Yi Min Zhu
Keyword(s):  
Water Treatment ◽  
Ballast Water ◽  
Uv Light ◽  
Porous Ceramic ◽  
Ceramic Filter ◽  
Operational Conditions ◽  
Filter Performance ◽  
Algae Removal ◽  
Ballast Water Treatment ◽  
Removal Efficiencies

In light of urgent requirement of onboard ballast water treatment, this paper presents a laboratory study of an application of a novel wall-flow structure porous ceramic filter (PCF), with employment of UV light. It has been found that, for onboard treatment, the operational conditions may significantly affect the filter performance. To obtain optimal operational conditions and high filtration efficiencies on plankton, PCF was studied systematically though computational prediction and mathematical analysis. According to the strict criteria of International Maritime Organization (IMO) on ballast water treatment, high density of indicator algae were mixed into simulated ballast water as processing targets, and nearly 100% removal efficiencies are expected. Flow rate, algal density and algal size were chosen as three key operational conditions, was investigated on a 6L PCF. Response surface methodology (RSM) was used to evaluate the significance of the three factors on the response values of algae removal efficiencies.

Application of Porous Ceramic Filtration on Ballast Water Treatment

2012 ◽  
Vol 610-613 ◽  
pp. 1505-1508 ◽  
Author(s):  
Man Xia Zhang ◽  
Xiao Jia Tang ◽  
Yi Min Zhu
Keyword(s):  
Water Treatment ◽  
Ballast Water ◽  
Porous Ceramic ◽  
Marine Ecosystem ◽  
Ceramic Filter ◽  
Human Beings ◽  
Flow Rates ◽  
Ballast Water Treatment ◽  
Wall Flow ◽  
Ceramic Filtration

Ballast water has been detected to be a great threat to marine ecosystem and human beings for threatens from biological invasion. Filtration is a kind of optimising primary method in ballast water treatment. However, so far no suitable filter has been applied considering effectiveness, economy, and resistance. A novel wall-flow structure porous ceramic filter (PCF) was adopted to combine with UV radiation. To evaluate the PCF, three types of indicator algae were filtered at different flow rates and initial alga densities. The results showed that up to 100% removal effciencies can be obtained on alga greater than 10µm and less than 50µm at the pointed alga density. The mechanism behind high removal efficiencies and high velocity were revealed as well.

Prediction and Optimization for Wall-Flow Structure Porous Ceramic Filter on Ballast Water Treatment

2017 ◽  
Vol 865 ◽  
pp. 169-174
Author(s):  
Man Xia Zhang ◽  
Yan Liu ◽  
Lei Si Ma ◽  
Mei Na Xie ◽  
Yi Min Zhu
Keyword(s):  
Water Treatment ◽  
Flow Structure ◽  
Ballast Water ◽  
Porous Ceramic ◽  
Experimental Studies ◽  
Ceramic Filter ◽  
Operational Conditions ◽  
Ballast Water Treatment ◽  
Wall Flow ◽  
Removal Efficiencies

In light of urgent requirement of onboard ballast water treatment, a novel wall-flow structure porous ceramic filter (PCF) has been applied with combination of UV light in our laboratory works. According to the strict criteria of International Maritime Organization (IMO) on ballast water treatment, removal efficiencies on indicator planktons should be almost 100% even at high initial densities. However, the treatment efficiencies of PCF may be greatly affected by operational conditions of the system. Hence response surface methodology (RSM) was used to evaluate the significance of the operational factors on algal removal efficiencies. Based on our previous works, flow rate, algal density and algal size were considered as three key conditional factors during PCF treatment. These three individual factors and interactive effects between each two facts were studied statistically by Minitab 15. Also, experimental studies were arranged according to full factorial design of a 6L PCF on simulated ballast water treatment at different flow rates, algal densities and algal sizes. By computational prediction and mathematical analysis, the operational conditions were optimized with first order derivation of predicted model. And by doing so, the utmost optimization was estimated to achieve higher performance of PCF system.

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.

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

Considerations in the Design of the Primary Treatment for Ballast Systems

2003 ◽  
Vol 40 (01) ◽  
pp. 49-60
Author(s):  
Michael G. Parsons
Keyword(s):  
Water Treatment ◽  
Great Lakes ◽  
Ballast Water ◽  
Primary Treatment ◽  
Coast Guard ◽  
Secondary Treatment ◽  
Bulk Carrier ◽  
Ballast Water Treatment ◽  
Mechanical Separation ◽  
Hierarchy Process

Investigations are currently underway to establish effective primary and secondary ballast water treatment methods to minimize the potential for the introduction of additional nonindigenous aquatic species into the Great Lakes and other U.S. coastal waters. This treatment could be used in place of mid-ocean ballast exchange currently required by the U.S. Coast Guard for all vessels entering the Great Lakes in ballast from beyond the Exclusive Economic Zone (EEZ). Primary and secondary treatment could provide environmental protection for both Ballast On Board (BOB) vessels, which are required to perform mid-ocean ballast exchange before entering the Great Lakes, and No Ballast On Board (NOBOB) vessels, which are currently exempt from any ballast exchange requirements. Primary treatment using some form of mechanical separation to 100 urn or 50 um followed by secondary treatment using 254 nm UV irradiation or some form of chemical treatment are currently leading candidates. Over the past six years, the Great Lakes Ballast Technology Demonstration Project (GLBTDP) has undertaken the full-scale evaluation of 340 m3/h (1500 U.S. gpm) ballast water mechanical separation using an automatic backwashing screen filter, hydrocyclone, and automatic backwashing disk filter. This experience provides the basis for the investigation of various ballast system design issues that must be considered in the selection and design of the primary ballast water treatment. This investigation is based upon the ballast system of a typical Seaway size bulk carrier using port and starboard 2000 m3/h (8800 U.S. gpm) main ballast pumps. A discrete multicriterion optimization tradeoff study using the Analytical Hierarchy Process (AHP) is also presented to illustrate a rational method for determining the best choice for primary ballast water treatment for such a Seaway size bulk carrier.

Equipment and Technology Research of Ballast Water Treatments

2014 ◽  
Vol 998-999 ◽  
pp. 414-417
Author(s):  
Jun Wang
Keyword(s):  
Water Treatment ◽  
Chemical Treatment ◽  
Ballast Water ◽  
Comprehensive Treatment ◽  
Technology Research ◽  
Advantages And Disadvantages ◽  
Marine Environmental Protection ◽  
Ballast Water Treatment ◽  
Water Treatments ◽  
Marine Environmental

Biological invasions caused by Ballast water is always one of the diffcult problems of marine environmental protection, and the technology of ballast water treatment is an effective way to solve biological invasion. This article introduce many equipments of ballast water treatment, introduce physical ballast water treatment, chemical treatment and comprehensive treatment, then describes the advantages and disadvantages of these metheods.

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