Algae removal

Hello,

What is the way to remove algae from reverse osmosis treated water? Each 1000 gallons we have one gallon having algae.

Please advise

Kind Regards,

Taxonomy

• RO Systems
• Drinking Water Treatment
• Algaecides
• Water Treatment Solutions
• Algae
• Water treatment
• water treatment

17 Answers

1. Algae needs three ingredients to grow.  Sunlight, water and nutrient value.   Keep the water in the dark or remove the nutrient value with other plants and no algae will grow.

2. Alga grow with the existance of mineral phosphate and nitrate. After the reverse osmosise you need to remove those minerals from the water. Otherwise, they will grow again even if you remove the algae from the water by RO

3. Are you talking about the refuse water from the RO?  If you cannot discharge it, you could recycle it through a tank or basin and treat it with ultrasound.  You would need about a week of residence time to cause the algae after treatment to naturally settle where it could be concentrated at the bottom and routed to a waste treatment facility.

   To reduce the intake algae level, treat the supply reservoir.  Our device can control a circular area of 120 acres (50 ha) for cyanobacteria and 17 acres (7 ha) for green algae and diatoms.  It can also prevent biofilm formation in a zone of 60 meters from the device radially.

   www.sonicsolutionsllc.com

4. Hello, I would have to learn more about your system, where the feedwater is sourced, what steps are used in pretreatment.   Do you know what type of algae you are dealing with? 

5. Following is advised:

   1. Remove through Mechanical means.

   2. Install Hydropath equipment to minimise algae growth, slimes and limescale.

   Regards,

   M.Ilyas khan (ilyas.khan@atg-gis.com

    

6. AT
   what stage of the plant you have algae... sea water, filtration stage, at RO stage … where? Short descriition of the plan t will help 

7. Algae or bio mass is passing through RO membranes due to so many reasons. Increase effectivity of biological system. Before feed to RO use UV or chlorination system.I have faced same problem

8. If you have the algae in the incoming water it must be removed before the RO membranes otherwise the membranes will get choked. The best biocide to remove algae from water is chlorine dioxide.

9. This indicates that algae can enter your system subsequent to the reverse osmosis treatment (by the tap for instance). The one contaminated gallon will be the first one you take after a phase when significantly less water has been used. Use black tubings and black storage tanks to prevent algae growth on the way from ultra filtration to final water use.

10. RO treated if properly stored should not have algae. It may be treated by oxidation processes like chlorination, ozonisation, Hypo or bleaching power  addition. It may be reprocessed through RO or UF also based on the use and acceptability.

11. Physical removal depends on final water use, UV and micro filtration are a common method, ensure if storing that tank recycles

12. Ultrafiltration will remove them

13. There are biocides for RO membrane treatment. Usually the biocide treatment is provided during the last stage (membrane rinse) of RO cycle.

14. The USAID in a project on Litani River advised the use of CuSO4 to treat algae in irrigation water. 

15. Algae appears if BOD is not reduced aptly. SGP technology invention helps reduce BOD aptly. See www.onenature.com write to me if further need?

16. How can you have algae in RO treated water? Are you storing it in open to the air and exposed to sunlight?  Also, there should not be much N or P nutrient so algae  should not grow much. It must be seeded after the RO treatment. Algal cells are large and often aggregated and would be removed by the RO unless it has a hole in it.  Add some chlorine and it will kill the algae.

    1 Comment

    1. Consider this as the most likely source.

17. Georges:

       Our biopolymer binds to proteins in algae and agglomerates them together and floats to the surface for a top skim to remove all algae. 
       The biopolymer is certified 100% non-toxic.

    lisa@aquastry.com