Published by Mohammed Al-hadhrami
Is there new technology to disinfection the raw water from such illnesses as typhoid fever, dysentery, cholera, and gastroenteritis - without using chlorine?
Chlorine is a better than other alternative, however, if recurring and maintainance cost are not issue then opt for UV disinfection just before intake of water.
Apart from this if both treatment costly, you may opt for SODIS but land could be an issue.
#purenvision
Regards,
Mahesh Gadekar
Published by Mahesh Gadekar, CEO, Geoenvirovision (Testing, Consultancy and Research Organization)
Ozone treatment is the next alternate to Chlorine. UV is suitable for small scale immediate use application.
Membrane filtration removes all microbes but it may reappear. For bottling plants it is suitable.
But Chlorine is the best for municipality big scale application, since the residual remains for longer duration.
Published by Govindasamy Manickam, GM at Adani Power Ltd.
There is Activated Silica and Silver, Silver and Copper Ionisation depending on volumes. we also have AOP UV with a 6 log kill rate, let me know if you want more details britishwaterinc@gmail.com
Published by John Turner, BriteWater International Ltd Inc Philippines - Director
The other two answers are right on the money with UV- however you may want to consider ozone as well - as long as bromide levels are low the DBPs should be low. After ozone, the chlorine residual can be much lower. There are other disinfection methods out there as well such as Filox, a solid-state oxidant but it has nothing near the power of ozone. . The big take away of the Surface Water Treatment Rule is that difficult to inactivate pathogens must be removed by filtration.
Published by Gregory Pearson, Environmental Trainer - Educator - Curriculum designer
Why would you want to disinfect raw water? If you wanted to waste a lot of money you could use high intensity medium pressure UV. Why the aversion to chlorine---it really works except for crypto, and it's cheap. I did a recent study that found no change in bladder cancer rates in Canada and USA in the 40 years since THMs were regulated. Let me know if you want to read it.
Published by Joseph Cotruvo, President at Joseph Cotruvo & Associates, Water , Environment and Public Health
That chlorine and look-alikes are acceptable for Canada and the U.S. is a point well taken, while there have been no other inexpensive alternatives. But for the developing world chlorine is not viable. This is because, 1) In point-of-use treatment dosing is a problem, that either too much or not enough is used, and 2) In large scale treatment, this is not sustainable: too expensive and not monitored and evaluated for the long periods necessary. We need to talk about applications not only in the industrial world, but also in the developing world.
Published by Anthony Reid Harvey
Yes, but typically treated and not raw water is disinfected as a tertiary stage,
membranes, ozone and ultraviolet are recognised alternatives to chlorine
Published by Gary Brown, Water Practitioner at Dikubu Water