YLC-2000 Siemens LCD Screen Automatic Self Cleaning UV Water Treatment For Aquaculture
Principle for UV sterilization
All forms of life known on the earth exist on the basis of DNA and RNA for reproduction and existence. DNA and RNA are both composed of 4 kinds of chemical substance units.
A--Adenine
T--Thymine
C--Cytosine
G--Guanine (the basic component for the nucleic acid)
In time of cell reproduction, the long chains inside DNA are opened when Unit A in each chain will look for and connect with Unit T. Each long chain can reproduce an identical chain to the chain freshly split, restore the complete DNA before splitting and serve as the foundation for the new-borne cells. However, the ultraviolet at a wave length of 240-270nm is able to break the capacity of DNA to produced protein and reproduction. Once the DNA and RNA of bacteria and viruses are damaged, their capacity to produce protein and reproduction are both lost. As the bacteria and viruses usually have a very short life cycle, those will soon perish that cannot reproduce.
The effective of UV sterilization is often expressed in killing ratio, e.g., 99.9%. Namely, 99.9% of the original bacteria have been killed and only 0.1% exists, or, 1/1 000 has survived. As 1000 is the 3 in 103 or in log, it is habitually to express the killing ratio with 310g. The killing ratio of ultraviolet depends on two factors: 1, ultraviolet intensity (I); and 2, irradiation time (T).
FAQ:
01. What is the source of raw water to be treated?
-- is it underground water or well water? or river water ,other source?
02. What is the capacity(m3/hour) you required for this sterilizer?
-- most IMPORTANT requirement.
03. What will the treated water be used for?
--for human drinking or industry purpose?
04. What is the power supply in your country?
220V/60Hz or other?
Comparion Of Disinfection Methods:
|
Factors to be considered |
Liquid chlorine disinfection |
Chlorine dioxide disinfection |
Ozone disinfection |
UV disinfection |
|
|
Time to be processed |
30 min |
≤30min |
5~10min |
30~60s |
|
|
Dosage (mg/l) |
2~20 |
5~10 |
1~3 |
30~40 |
|
|
Efficiency of inaction bacteria |
High |
High |
High |
High |
|
|
Efficiency of bacteria and viruses |
Lower middle |
Middle |
High |
High |
|
|
Water quality factors |
More easily affected by PH and temperature |
More easily affected by PH and temperature |
Less affected by PH and temperature |
Less affected by PH and temperature |
|
|
Operation complexity |
Simple to middle |
Middle |
Complicated |
Simple to middle |
|
|
Economical efficiency |
Operation cost |
Lower middle |
Middle |
Above the average |
Lower middle |
|
Area |
Large |
Less |
Small |
Small |
|
|
Maintenance work |
Large |
Less |
Large |
Small |
|
|
Adverse impact |
Safety during transportation |
Yes |
Yes |
No |
No |
|
Site security |
Very high |
Middle |
Middle |
||
