Ammonia (NH3/ NH4+) treatment process

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Ammonia (NH3/ NH4+) treatment process

Hello everyone

I am looking ​for the method ​to treat ​Ammonia ​parameter in ​waste water. ​

it is waste ​water from WC ​and canteen, ​estimating for ​concentration ​about 100 mg/l. ​

please ​suggest some ​tips for me ​

i am really ​appreciate if ​have P&ID ​from  you. ​

thanks so much.

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11 Answers

  1. Please give some more details about your treatment plant to give you an appropriate solution to solve your problem. I have developed an innovative Anoxic Bioremediation Technology with a consortium of Strict and Facultative anaerobes having special capability to reduce ammonia. So please write details

  2. If the value of Ammonia is less than 3 mg/L, you may consider using Zeolites as filter media for final effluent. Furthermore the zeolite sand can be regenerate simply by drying the media under the sun (although the efficiency of absorption will reduce most probably around 60=70%. If using Chlorine for oxidation, might result in THM production. Chlorine oxidation ratio to Ammonia, based on my experience is 5:1 (5 mg/L free chlorine to 1 mg/L of NH4). 

  4. Without telling us whether you have an existing waste treatment plant or whether this is a stand alone plant.  Canteen water can be a problem because of Fats oils and grease, the WC is less of a problem.  There are package plants, which you can use such as Rotating Biological Contractor RBC which can be effective.  They need to be colonised by ammonia oxidising bacteria. 

  5. Without telling us whether you have an existing waste treatment plant or whether this is a stand alone plant.  Canteen water can be a problem because of Fats oils and grease, the WC is less of a problem.  There are package plants, which you can use such as Rotating Biological Contractor RBC which can be effective.  They need to be colonised by ammonia oxidising bacteria. 

  6. just add a small bioreactor into your aeration tank.  we have a bioreactor that would work for several years, cranking up so much microbes for Ammonia.  this set of bacteria are chemosynthetic and very hardy.    

    its very convenient.  

  8. You haven't stated what else is in the wastewater besides ammonia.  The WC and canteen wastewater will contain a large quantity of solids and given the high ammonia concentration, I would also expect a BOD (Biochemical Oxygen Demand) of around 800 - 1,000 mg/L.   This also needs to be considered as there are two options for this specific situation.  If you are not treating the wastewater biologically (i.e. aerobic suspended growth or attached-growth bacteria treatment), and are only treating the wastewater by passing  it through a septic tank, your only option is adsorption - with the most likely adsorption media being zeolite due to it's low cost and being reasonably available. 

    Once the zeolite is spent, it can be regenerated using a salt solution and the salt water (containing a high concentration of ammonia) can be potentially beneficially used as a nutrient based on confirming irrigation and rainwater will wash out the salt. 

    The alternative to adsorption is biological treatment using (first) aerobic bacteria to remove the BOD to a concentration of less than 15 mg/L, which will then allow nitrifying bacteria to convert the ammonia to nitrate. 

    This will not remove nitrogen however.  If removal of nitrogen is the objective, you will need a more sophisticated process of at least two to three cells with different biological conditions.  Denitrifying bacteria can be used to convert the nitrate to nitrogen gas (released to the atmosphere - and about 80% of what we breath), but they require conditions without dissolved oxygen present and a readily-biodegradable carbon source.  This is referred to as biological-nutrient-removal (BNR) or tertiary treatment. 

    In North America you can purchase package treatment plants that are designed to remove BOD and Total Nitrogen for individual household, cluster residential and commercial (e.g. Canteen and WC) applications.  There are testing programs to verify these treatment systems work and are certified by NSF (USA) and CSA (Canada) - but beware that testing is done using municipal strength wastewater with ammonia typically about 30 mg-N/L and BOD of around 250 mg/L - whereas a Canteen and WC facilities will be expected to be a much higher strength wastewater - so do not expect a certified unit with a 1 m3/d or 100 m3/d capacity to treat the same amount of Canteen/WC wastewater with a higher strength. 

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