Page 49 - Commercial Catalogue 2011

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Bacteria
Shigella flexneri
(dysentery)
3,400
Legionella pneumophila
(legionnaires disease)
3,800
Streptocuccus hemolyticus
(gastroenteritis)
5,500
Staphylococcus opidermidis
(toxic shock syndrome)
5,800
Leptospira interrogans
(leptospirosis)
6,000
Salmonella typhose
(typhoid fever)
6,000
Salmonella paratyphi
(paratyphoid fever)
6,100
Corynebacterium diphtheria
(diphtheria)
6,500
Escherichia coli
(E-coli)
7,000
Shigella sonnei
(gastroenteritis)
7,000
Moraxella catarrhalis
(bacterial meningitis, pneumonia)
8,500
Streptococcus lactis
8,800
Enterococcus faecales
(urinary tract infection)
10,000
Mycobacterium tuberculosis
(pulmonary tuberculosis)
10,000
Pseudomonus aeruginosa
10,500
Salmonella typhimurium
(gastroenteritis)
15,200
Clostridium tetani
(tetanus)
23,000
Cyst
Vibrio cholera
(cholera)
6,500
Bacteriophages
6,600
Cryptosporidium sp.
(diarrhoeal disease)
10,000
Algae
Chlorella vulgaris
(common green algae)
22,000
Molds
Penicillium expansum
(Blue mold)
22,000
Saprolegnia sp. zoospore
(egg fungus)
35,000
Viruses
Influenza virus
6,500
Hepatitis virus
8,000
Small pox virus
9,000
Giardia lamblia
(beaver fever)
10,000
Polio virus
21,000
Rota virus
24,000
Parasites
Trichodina sp.
(fish parasite)
35,000
Nematode eggs
92,000
Icthyophthirius sp
. (white spot)
336,000
Choosing the Correct UV Steriliser
1. Select application level required, bearing in mind the type of pathogen to be controlled or killed (see
table below). Level 2 or 3 is adequate for most applications.
2. Decide on the flow rate that you require in m
3
/hr (thousand litres/hour) taking into account the
recommendations below.
3. Divide this number by the flow rate per lamp given in the table below for your selected application level.
4. The result tells you the number of lamps that are required to treat your given flow rate. If you have
an odd number or fraction of a number, you should round up to the nearest whole even number. If
the number is greater than 12 then you should use 2 or more units to give the total required
number of lamps.
5. Use the product data table to obtain the specification of the correct unit for your application.
Please note that all outputs are given for the end of the maximum lamp life of 8000 hours. However it is
strongly recommended that lamps are replaced every 4000 hours (approx. 6 months) to ensure optimum
efficiency of the steriliser.
Smallest
To
Largest mJ/cm
2
mWsec/cm
2
µWsec/cm
2
FlowRatem
3
Virus
Bacteria Algae Yeast
Protozoan
1
Controlled
Some sp. Many Sp. Many Sp. Some Sp. No
<10
<10
<10,000
>6 m3 /hr
2
Deactivated Some sp. Most Sp. Most Sp. Many Sp. No
15
15
15,000
4 m3 /hr
4
Lethal
Most Sp. Most Sp. Most Sp. Most Sp. Some Sp.
100
100
100,000
0.6 m3 /hr
5
Lethal
Most Sp. Most Sp. Most Sp. Most Sp. Many Sp.
200
200
200,000
0.3 m3 /hr
To maximise germicidal action it is important
to consider the contact time and distance
between the UVc source and the micro-
organisms to be treated.The contact distance is
set by the design of the UV steriliser.The actual
time it takes for water to pass through the
chamber - ‘the contact time’- is a function of
the recommended flow rate per lamp.The
overall volume of water in the livestock tank or
system, and the frequency that the total volume
comes into contact with the UVc source, is
also significant and must be taken into account
for the correct operation of the filter on a
given system.We have carried out extensive
trials over many years to ascertain the best
relationship between the ‘contact time’ and the
total volume of the system, and the turnover
requirements of the system. UV output,
recommended flow rates and maximum system
volume are given for each model.
Exposures Needed to Kill Micro-Organisms
Technical Fact
Micro-Organism
Kill Rate
(µWs/cm
2
)*
* UV dosage required to destroy 99.9% of micro-organisms
Bacteria
Cyst
Algae
Moulds
Viruses
Parasites
Application Level
Sterilisation
Type and Size of Pathogen
UVDose (intensity x exposure time)
Effect of UV
3
Deactivated Many Sp. Most Sp. Most Sp. Most Sp. Some Sp.
30
30
30,000
2 m3 /hr
www.tropicalmarinecentre.co.uk Tel: +44 (0) 1923 284151 Commercial Catalogue 44