UV Disinfection for WWTP effluent

Taxonomy

• Ozonation
• Treatment Methods
• Chemical Treatment
• Biological Treatment
• Sewage Treatment
• UV Disinfection
• Filtration
• Ozone
• Filters
• Wastewater Treatment
• Biological Treatment
• Wastewater Treatment Plant Design
• Water Filtration
• Submerged Aerated Filtration
• Moving Bed Biofilm Reactor (MBBR)

7 Answers

1. Efficiency of disinfection by UV light depends on turbidity of water. Higher the turbidity lower the efficiency. UV light will only disinfect treated waste water. It is better to use disinfection by ozen which further reduce COD and disinfect waste water totally.

2. For better appreciation,BOD level in the treated effluent needs to be indicated ,in addition to flow.

3. Dear Jose Luis,

    

   If you want do an economical evaluation to install a system that will work just for a few years, the chlorine or chlorine compounds will be good options. But if you need evaluate, buy and install a system that work in confidence for many years at a low costs I recommend you install a good ozone system.

   If you must look for really professional disinfection system designed to solve your problem, then consider ozone option in your economical evaluation.

   Bleach, chlorine and chlorine compounds have a cheap initial cost but really expensive long term use. On the other hand, ozone has a higher initial investment and really lower costs over the long term use than the chlorine and its compounds.

    

   Regards,

    

   Orlando D. Gutiérrez Coronado

4. I still prefer chlorination, what is reason for moving away? If it is residual chlorine levels there are a few things that can be applied to remove the residual as it is readily oxidised.

   Chlorine can be measured, uv will rely on water quality and efforts to keep tubes free of bio- growth

   Ozone will work but generators require good quality, low moisture content so consider that for your application

   Regards

   1 Comment

   1. Thank for the answer. The reason is safety. Using chlorine gas needs many safety controls and there is a high risk.

      1 Comment reply

      1. Hi, yes of course there needs to be high safety measures in place for chlorine gas.

5. I would Design an open channel UV disinfection system without any pumping for this flow as only gravity flow required. Normally treated effluent from TF would have transmittance >50%. If you want to use ozone you have to consider costs and hazards in producing ozone on site.

6. Hi, Orlando ist right, the transparency (called transmittance) is a important factor. You can have a free design here with some prices and solutions: https://www.1h2o3.com/outils/dimensionnement-de-reacteurs-uv

   On French only.

   Let me know if you need any additional information

    

   Nicolas

7. Dear Jose Luis,

    

   The UV disinfection needs a high transmitance (effectiveness in transmitting radiant energy) to it can disinfect the wastewater reaching the patogens. That is one of the reasons due the UV systems are more used in clean water as drinking or botling without solids or any other interference in transmittance property.

    

   In this case I recommend you evaluate the ozone use, and if you are interested we can help you doing an approximate calculation for thi projectyou, and after supplying a good small ozone generator equipment to you can do the pilot test usinng a little stream to obtain data for the plant.

    

   We are repeserntative of the bests ozone generators manufacturesr and other technologies to be used in this type of projects, and we can help you calculating and selecting the appropate TM branch and size of the system for your case. Depending on the size and buy terms you could buy the big system at a very good price directly to the manufacturer with our design as integrators.

    

   Regards,

    

   Orlando D. Gutiérrez Coronado