Published by Ahmed Khafagy, Technical support Team
We have a river water plant which treats the river water to drinking water, using the ultrafiltration (UF) system.
The intake water has high ammonia content.
What is the best way to remove the ammonia or reduce it to drinking water levels?
If you are talking about NH4 then simple filtration through Australian zeolite before any aeration will reduce NH4 significantly
Regards
Peter
Peter Caswell
Director
Reparator Pty. Limited
ABN 17 160 768 221
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Email: peter.caswell@reparator.com.au
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Published by Peter Caswell
Hi Ahmed,
I guess you have quite a high concentration of ammonia, low retention and have tried aeration already? Please give me an idea of the ammonia level. Do you have a retention pond/reservoir at the inflow and what is the retention time? I might just have a solution for you in a plant extract product form.
Regards
Dave
Published by Dave Gaybba, Managing Director
biological preocess whis turn amonia to nitrite (aerobic) andfrom nitrite to nitrate (anaerobic) the nirate will be used by microbs and will be released to the atmosphare in the form of N2
Published by Oz Ihia, Engineering manager at P2W
Aeration is a common way to remove ammonia from water (https://www.gewater.com/handbook/ext_treatment/ch_4_aeration.jsp)
This is a good article in relation to the nitrification process and how aeration facilitates ammonia removal.
http://www.drydeninformationcentre.com/aeration-of-lagoons-for-landfill-leachate-treatment-manual
The most efficient way to do this is through fine and ultrafine bubble generation. Ultrafine bubbles remain suspended in the water for up to several days, thus significantly reducing the amount of energy required to operate.
I am experienced in fine and ultrafine bubble generation technologies and their applications for ammonia removal in wastewater treatment in Asia and Australia. If you would like to know more, email me at andrew@waterandoilsolutions.com.au
Published by Andrew Tran, Engineer
Yes The ammonia issue should be considered from the river perspective
however oxidation could be an answer here either as suggested by ozonation or by direct electrolysis. As to regard of chlorination beware of chloramine formation. and with the level of oxidant be cautious with the impact on membrane
what flow are you looking at?
Published by Gerald Busca, Quazar Consulting Limited
Hello Mr Ahmed please send me your email I'd so can pass you the details..My email I'd harish@acsipl.com
Published by Harish Anantharaman, Director
300- 350 m3 /hr.
Published by Ahmed Khafagy, Technical support Team
Yes The ammonia issue should be considered from the river perspective
however oxidation could be an answer here either as suggested by ozonation or by direct electrolysis. As to regard of chlorination beware of chloramine formation. and with the level of oxidant be cautious with the impact on membrane
what flow are you looking at?
Published by Gerald Busca, Quazar Consulting Limited
There are several common methods. You can consider aeration, attached growth biological method, or using immobilised biological treatment, even a prior artificial wet land. Zeolite filter is another way to remove ammonia.
Published by Steve Li, Director at Fucheng Environtech (S) Pte Ltd
If you change the pH you will make a majority of the dissolved ammonia free ammonia and available for removal by aeration. This is the least expensive and easiest way to do it.
Published by Robert Thomas
Adjusting pH + aeration is not as easy as said. Normally you need to adjust pH to 10-11 to blow off the ammonia, then you need to adjust it back. It works well at high concentration, but when the concentration is low, removal by aeration is challenging.
I think operation wise the easier way is to use biomass carrier based biological method or zeolite filters.
Published by Steve Li, Director at Fucheng Environtech (S) Pte Ltd
Do you know company that are providing such biological systems. Contact me at akhafagy@ymail.com
Published by Ahmed Khafagy, Technical support Team
dear Ahmad , in order to remove ammonia to drinking water level , you can apply breakpoint chlorination as prechlorination ,it is effective method.
Published by Amin Waly, 20,elhendawe st. samahah, Samannod/Gharbiah/Egypt
dear Ahmad , in order to remove ammonia to drinking water level , you can apply breakpoint chlorination as prechlorination ,it is effective method.
Published by Amin Waly, 20,elhendawe st. samahah, Samannod/Gharbiah/Egypt
Ammonia is a major source of water pollution. One of the most common methods for removal of ammonia from water is oxidation. In this work, ozonation of ammonia using microbubbles was studied in a pilot plant. The experimental results indicate that ozone microbubbles were quite effective in oxidizing ammonia. Oxidation of ammonia was effective at high pH and high ozone generation rates. Ozonation was found to occur by direct reaction of ozone with ammonia at the higher pH. However, the hydroxyl radicals were also involved at the lower pH. Bromide ions acted as a catalyst in the ozonation process, and a faster rate of oxidation of ammonia and lower yield of nitrate was observed. The volumetric mass transfer coefficient of ozone in water was determined. It increased with the increasing rate of ozone generation and the pH of the medium.
Published by J D
Ultrafiltration (UF) retains only solids. All soluble pollutants including organics, ammonia and other minerals will just pass through the UF membrane.
If the river water has high ammonia levels then it is strongly polluted (0.5 ppm free dissolved ammonia NH3 kill fish) and also the level of dissolved organics and other oxidizable compounds is likely to be (very) high as well (please verify COD and TOC). In such case, advanced oxidation (ozone, ...) would be very inefficient and expensive in operating costs. Hence (advanced) biological treatment with biological nitrogen removal - upstream of UF - would be far more efficient and sustainable.
Published by Bruno Peeters, managing director at Model Engineering
You can contact me on akhafagy@ymail.com
Published by Ahmed Khafagy, Technical support Team
Do you know any Companies that can supply Biological Treatment. We are interested in this option.
Published by Ahmed Khafagy, Technical support Team
I would suggest our nano bubble ozonisation system prior your filtration.. Test reports show amonia reduced to zero within 5 minutes of application...Even heavy metals are oxidised to higher state so become easily filterable... And also enhances membrane life and maintainence...
Published by Harish Anantharaman, Director
Send me the details of this system to akhafagy@ymail.com
Published by Ahmed Khafagy, Technical support Team
Ammonia is difficult to remove from water. It can be removed by cation exchange resin in the hydrogen form, which requires use of acid as a regenerant. Degasification can also be effective.The ammonium ion is not harmful to health, but its presence, especially in surface water, can be considered as an indicator of pollution. However, it is an annoying element because it interferes with chlorinationTo form chloramines that alter the odor and taste of water (chlorine taste), and is also a food for some bacteria which can thus proliferate in the distribution networks. It should therefore be removed from the water intended for human consumption.
Ammonium Removal Techniques:
1.Chemical oxidation: an efficient process to use under very precise conditions.The oxidant used is chlorine which is injected at a concentration beyond the critical point(Break-point) so that it has reacted with all the nitrogen compounds present in the water
2.Ionic exchange: a simple process that raises the problem of its own releases. It is possible to use natural resins, zeolites (chabazite, modernite, clinoptilolite), or synthetic resins, these. The latter being preferred for reasons of longevity and ease of implementation. These, of cationic type, fix calcium and magnesium ions, and, to a lesser extent, ammonium ions. Their use is therefore justified onlyIn the context of a softening treatment. They then allow the removal of ammonia and possibly even some cationic micropollutants (arsenic, gallium ...). This process is based on the exchange of ammonium ions contained in the water with sodium ions contained in the resin.
3. Stripping: a process unsuited to drinking water.Ammonia is a weak base which hydrolyzes in water to form ammonium and hydroxide ions.
4.La filtration biologique : un procédé performant mais nécessitant certaines contraintes d’exploitation L’élimination biologique de l’ammonium (nitrification) s’effectue en deux étapes, mettant en œuvre deux types de bactéries aérobies et autotrophes (c'est-à-dire consommatrices de carbone minéral), qui transforment l’ion ammonium en nitrites.
However,the problem has not been fully resolved.The advantages and disadvantages of each allowing to choose the most appropriate according to specific constraints.However, if the effectiveness of the treatments makes it possible to get rid of the problems due to ammonium,efforts are needed to reduce pollution at source.
Best regards,
Daniela Anghel
Published by ANGHEL DANIELA, Eng
We are interested in the Biological Filtration system.
Do you know any Company that can provide us with this system.
Contact me at akhafagy@ymail.com
or 0020 12 082 082 32
Published by Ahmed Khafagy, Technical support Team
areate your water by MLSS if will remove ammonia.
for Example
make a tank X2 bigger then feed inlet (100 liter per day means make areation tank 250 and 300 liter)
manitaine F/M food to mass ratio, you will see the good results.
Regards
Abdul Gaffar
Published by Rayan Ahmed
Dear All
Many thanks for all of your input into this question I highly appreciate it.
My main concern here is that I have
Ammonia around 1.4 ppm
COD 14 mg O2/l.
BOD 5-6 mg O2/l.
Total Alk. 150-170 ppm.
Do you think that using Bromicide will work.
Do you feel that Ion Exchange resin ( Cationinc) or Zeolite will not be colloged by the high BOD and COD. Is it going to be selectively removing the Alkalinity instead of Ammonia at these concentrations.
Published by Ahmed Khafagy, Technical support Team
There are some good papers to be found here on the subject using oxidation chemicals including ozone: http://pubs.acs.org/doi/abs/10.1021/ie9702082
Published by Marianna "Yana" DeMyer, CEO, Roving Blue, Inc.
its best to use something that was designed to treating rivers and getting rid of ammonia in situ. Biocleaner river units are ideal and cost of treatment is low and convenient. Guy is correct. you need archae and bacteria to treat down bacteria and make it perfectly heathy to drink.
Published by Eros Kaw, Biocleaner Inc. - Chief Tech Support
Do you have any contacts to the biocleaner system suppliers. Contact me at akhafagy@ymail.com
Published by Ahmed Khafagy, Technical support Team
This section provides details on the latest developments and efforts in the removal of ammonia from wastewater.
We have discussed the following:
Published by Anurag Mishra, Mechanical Engineeer site incharge at Chembond selonies water technology limited ,
Ammonia is widely used in the Chemical Industry as a cleaning and bleaching agent in the production of fertilizers, plastics, and explosives just to name a few. As a result, large quantities of wastewater containing ammonia are produced and many industries now have to treat the wastewater to remove the ammonia so that it is not discharged back into the environment. The following are the various methods followed for the removal of ammonia.
Published by Anurag Mishra, Mechanical Engineeer site incharge at Chembond selonies water technology limited ,