Ultraviolet Light in Water and Wastewater Sanitation - Chapter 4 pdf

... and reactor design. Typical values for k are, for example, 0.016/min for a low-pressure 8-W(e) lamp (without the 185 nm-line), and 0.033/min for a 15-W(e) lamp transmit- ting also the 185 nm-line. ... full-scale applications are planned, because the combination UV-H 2 O 2 promotes less formation of bromate ion in bromide-containing water [Kruithof and Kamp, 2000]. 4. 3 SYNERGISM OF...

Ngày tải lên: 11/08/2014, 09:21

... Wastewater 5 .4 Applied Ultraviolet Doses in Wastewater Disinfection 5.5 Choice of Lamp Technology in Wastewater Disinfection 5.6 Toxicity and Formation of By-Products 5.7 Preliminary Conclusions on Wastewater ... published Ultraviolet Disin- fection Guidelines for Drinking Water and Water Reuse [NWRI, 2000]. In June 2001, the International Ultraviolet Associ...

Ngày tải lên: 11/08/2014, 09:21

... Eindhoven, the Netherlands.) 160 140 W/5nm 120 100 80 60 40 20 0 2 kW, 140 0 V 320 280 W/5nm HTQ7 HTQ7 240 200 160 120 80 40 0 240 280 320 360 40 0 44 0 48 0 520 560 600 640 680 720 nm 4 kW, 140 0 ... aluminum on glass 75–90 Stainless steel 25–30 Chromium (metal) 40 Nickel (metal) 40 Oil paint (white) 3–10 Water paint (white) 10–35 Aluminum coating—paint 40 –75 White pla...

Ngày tải lên: 11/08/2014, 09:21

... (cm −1 ) (water) m k 1 (s −1 ) E (cm −1 ) (water + PHBA) m k 1 (s −1 ) 4. 54 125 0. 046 0.712 −0. 042 9 1. 84 0. 340 −0.0255 6 .49 300 0. 046 0. 546 −0.0370 1. 84 0.155 −0.0107 8 .42 560 0. 046 0 .44 2 −0.0295 ... micropollutants in drinking water remains of marginal importance in the disinfecting process with UV light. In pho- tochemical oxidations the conclusion can be dif...

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... and lawn areas (in 50% of the samples) (In this context, the EEC Directive 75 /44 0 on quality of surface water sources in- tended to be treated to obtain drinking water, recommends the following ... propanols— 2-( 2-hydroxypropoxy )-1 -propanol, 1-( 2-ethoxypropoxy )-2 -propanol, 1-( 2-methoxypropoxy )-1 -propanol—at parts per billion levels appear unchanged at the pre...

Ngày tải lên: 11/08/2014, 09:21

... 1983. Benitez, F.J., Beltrán-Heredia, J., and Gonzalez, T., Ozone: Sci. Eng., 16, 213, 19 94. Bernardin, F.E., in Proc. 84th Annual Meeting and Exhibition of the Air and Water Manage- ment Association, ... School of Civil Engineering, Environmental and Hydro- logical Engineering, Purdue University, West Lafayette, IN, 19 94. © 2002 by CRC Press LLC Narkis, N. et al....

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... reactions (4. 49) and (4. 50): (4. 75) (4. 76) with (4. 77) Finally, a trial -and- error procedure allows the reaction factor be known at different values of the Hatta number, Ha 2 , of reaction (4. 49). ... reactions with the following stoichiometry: 1. First-order reaction: (4. 14) with (4. 15) 2. Pseudo first-order reaction: (4. 16) with (4. 17) The ozone self-decomposition react...

Ngày tải lên: 11/08/2014, 17:22

... Radioactivity in Rainwater 83 4. 4.1 Introduction 83 4. 4.2 The Presence of Radioactivity in Rainwater: Sources and Pathways 84 4 .4. 2.1 Natural Radioactivity 84 4 .4. 2.2 Man-Made Radioactivity 84 4 .4. 3 Levels ... process. 4. 6.2 THE PRESENCE OF RADIOACTIVITY IN DRINKING WATER 4. 6.2.1 Natural Radioactivity Primordial radionuclides are present in drinking water to a...

Ngày tải lên: 18/06/2014, 19:20

... and Engineering and International Water Quality . He has collaborated in the peer reviewing process of many scientific and engineering jour- nals such as Ozone Science and Engineering ... Gas and Water Phases in Perfect Mixing Flow 11.6.1.2 Both Gas and Water Phases in Plug Flow 11.6.1.3 The Water Phase in Perfect Mixing Flow and the Gas Phase in P...

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... decomposition in alkaline solution, Ozone Sci. Eng., 22, 287–3 04, 2000. 73. Hsu, Y. et al., Ozone transfer into water in a gas-inducing reactor, Ind. Eng. Chem. Res., 41 , 120–127, 2002. 74. von Gunten, ... I II C C C C 2 C + 2 CC x ( ) CC CC C -PH C OOH P -P = OH C OOH OH -P = -N H C OOH N H -P = -C O O C OOH O-C -P = -O OOH O O O C O ©20 04 CRC Press LLC Finally, inhibitors...

Ngày tải lên: 11/08/2014, 17:22