how chlorides and sulphates interfere the removal of ammoniacal nitrogen from industrial waste water
A biological treatment plant systematically removes a certain proportion of nitrogen from wastewater due to bacterial growth. When wastewater has a nitrogen/carbon source ratio that is too high, adsorption for bacterial growth is not sufficient to meet discharge standards. Excess nitrogen can be eliminated biologically by adapting the treatment plant to incorporate a nitrification/denitrification process.
Through this process, the ammoniacal nitrogen contained in the wastewater is transformed in two stages into gaseous nitrogen. During the first, aerated stage, the nitrifying bacteria transform the ammoniacal nitrogen into nitrates. The nitrates are then transformed into gaseous nitrogen (N2), a harmless gas present in large quantities in the atmosphere, during the non-aerated denitrification stage. This step also consumes organic pollution.
Regards
The most widely used methods for removing ammonia from wastewater are air stripping ,ion exchange , breakpoint chlorination , and biological nitrification-denitrification. The traditional method of removing ammonia from municipal and industrial wastewaters is based on biological treatments.
Extended aeration found capable to remove upto 98% of the ammonia-N concentration of 1200-1600 mg/L from industrial wastewater. The removal percentage, however, in case of the conventional aeration system shall be 91-92%. The combined aerobic-anaerobic treatment would enable complete exhaution of the ammonia nitrogen.
Bibin K Suresh
Your question is too general. As always, the best method depends on the/your specific case and on the/your objectives. What are the/your objectives: (1) removing only ammonical nitrogen NH4-N from the water with or without converting it to NOx-N ? and to what residual NH4-N level? or (2) removing all nitrogen compounds (TN) from the water? and to what residual TN level?
What is the level of NH4-N, total Kjeldahl nitrogen (TKN), organics (TOC, COD, BOD), solids (TSS), chlorides, sulfates, ... in the wastewater? What is the water temperature and pH (e.g. for stripping out high levels of NH4-N)?
Bibin K Suresh
In an industrial rendering wastewater with neutral pH, medium salinity and low temperature (after removing coarse solids with screens and fat with a DAF) we removed over 99% of the organics (COD) and over 99% of the total nitrogen (TN incl. up to 80% NH4-N) by advanced biological treatment with partial nitrification (50% NH4 > NO2) and simultaneous anaerobic ammonia oxidation (anammox: 50% NH4 + NO2 > N2 gas).
if you are looking for low cost material then go for biochar/activated carbon and recycle the process for reusing it..
here the link if you would like to read
Article A brief commentary on activated carbon material as an effici...
Article The Review on Adsorption and Removing Ammonia Nitrogen with ...
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