دانلود رایگان مقاله لاتین uv برای تصفیه آب از سایت الزویر
عنوان فارسی مقاله:
بررسی عددی و تجربی ضد عفونی UV برای تصفیه آب
عنوان انگلیسی مقاله:
Numerical and experimental investigation of UV disinfection for water treatment
سال انتشار : 2017
برای دانلود رایگان مقاله uv برای تصفیه آب اینجا کلیک نمایید.
مقدمه انگلیسی مقاله:
1. Introduction
Ultraviolet (UV) disinfection is an effective way for water treatment [1]. The central idea of this method is to use UV-C, one range of wavelength from UV light, to inactivate microorganisms for functioning and reproducing itself. UV light is able to pass through the cell wall of the microorganisms and absorbed by the protein and nucleotides so that it can disrupt the structure of DNA or RNA of the microorganism. Unlike cryptosporidium for water treatment, UV disinfection for drinking water treatment does not introduce or generate any hazardous chemical materials or by-product during the procedure. Therefore, it grows rapidly since 1985 [2]. UV disinfection for water treatment becomes more popular when the UV disinfection method was included in the Surface Water Treatment Rule by United States Environmental Protection Agency [3]. The UV disinfection system for water treatment generally consists of one or more UV lamps and a conduit or duct in which the water to be irradiated. Given the location of the UV lamps and water, UV reactors can be divided into two different types, i.e. contact and noncontact types [4,5]. Contact reactor is more popularly used. In the contact reactor, the lamps are enclosed by the cylindrical quartz sleeves. These quartz sleeves are used to separate the lamps from water. During the operation, water carried along suspended microorganisms into the reactor. These microorganisms absorb radiation during their transit in the reactor. Given the non-uniformity of the UV fluence rate field in the reactors, different microorganism absorbs different UV dose when it flows through the reactor. UV dose is the amount of UV energy per unit area that incident on a surface. Such UV dose absorbed by these microorganisms affects the performance of the reactor. Generally, an optimum UV dose can be calculated from the desired inactivation rate which is associated with the total and live microorganism before and after the reactor. The performance of a UV reactor is governed by many parameters including, among others, the reactor diameter, lamp arrangement, lamp power, fluid properties and fluid flow rate. Therefore, knowing the effects of these parameters on the performance of the UV reactor is important for designing an efficient UV reactor
برای دانلود رایگان مقاله uv برای تصفیه آب اینجا کلیک نمایید.
کلمات کلیدی:
Experimental investigation of variability of ultraviolet fluxes at the ... link.springer.com/article/10.1007/BF02508724 by AA Eliseev - 1998 - Related articles Abstract. Some results of two years of regular measurements of UV radiation at the earth's surface in Siberia (56.5o N, 85o E) are given. It is shown that the ... Publication: Numerical and experimental investigation of UV ... https://www.researchgate.net/.../308385773_Numerical_and_experimental_investigation... Jan 25, 2017 - Numerical and experimental investigation of UV disinfection for water treatment on ResearchGate, the professional network for scientists. Experimental Investigation of Flow Field in Annular Ultraviolet ... pubs.acs.org/doi/pdf/10.1021/ie050624j by DA Sozzi - 2005 - Cited by 13 - Related articles Experimental Investigation of Flow Field in Annular Ultraviolet. Reactors Using Particle Image Velocimetry (PIV). D. Angelo Sozzi and Fariborz Taghipour*. [PDF]Experimental investigation of ultraviolet laser induced plasma density ... legolas.ece.wisc.edu/papers/Thiyagarajan_2008a.pdf by M Thiyagarajan - 2008 - Cited by 51 - Related articles Experimental investigation of ultraviolet laser induced plasma density ... in dry air by focusing 200 mJ, 10 MW high power, 193 nm ultraviolet ArF argon fluoride ... [PDF]experimental investigation of effect of uv radiation on flashover voltage ... webpages.uncc.edu/smohajer/Papers/C5.pdf by A Majzoobi - Cited by 1 - Related articles EXPERIMENTAL INVESTIGATION OF EFFECT OF UV RADIATION ON ... test, five kinds of insulators have been exposed to UV radiation for 160 days. Then the. The Experimental Investigation of The performance of Phosphor Coating dl6.globalstf.org/index.php/jet/article/view/1561 by JG Alotaibi - 2016 - Related articles The Experimental Investigation of The performance of Phosphor Coating. ... Varying the UV exposure time by putting substrate in the UV ozone cleaner has a ... [PDF]Experimental Investigation of Continuous-Wave Laser Ionization of ... www.pnl.gov/main/publications/external/technical_reports/pnnl-13696.pdf by BD Cannon - 2001 - Related articles This report describes experimental investigations of a method that uses .... 4.4 Beam Size of the 215 nm Beam Focused to Match the UV Enhancement Cavity.
