Hello , We are treating wastewater and sometimes pollution by nitrogen is too much high . Sometimes 300 mg/L and more . Is there any chemical ways to reduce TN .
Removal of nitrogen from wastewater is a complex process, even for large wastewater treatment plants. Significant issues remain on the treatment performance efficiencies for these systems. The variability in performance is due to the inter relationship of numerous factors including:
•Fluctuating flow rates
•Variability in waste strengths
•Complexities in the biological and chemical treatment processes
•Temperatures
•pH and Alkalinity
•Inhibitory chemical compounds
•Increased complexity of the additional mechanical devices such as pumps, filters, timers, controllers, etc. that are added to the process.
Nitrogen Reducing Technologies for Onsite Wastewater Treatment...
www.doh.wa.gov/portals/1/Documents/Pubs/337-093.pdf
Well, may be benefit to test as following
Nitrate is reduced to free nitrogen gas and the method looks simple from the principle but needs to be fine tuning. Other scientists have used another way to remove ammonia by air by increasing the value of PH
Until 8-10 and then the dissolved ammonia is transformed into an inert ammonia that can be removed by airflow, where ammonia is very soluble in water, it requires large volumes of air needing air approximately 3000 times the size of the bulk water and must be a contact tower of special designed to perform this task.
Regards
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Nitrogen is found in wastewater in the form of salts of ammonia and nitrate. Nitrogen can be removed by the stripping method in the case of ammonia, and ion exchange or electrolysis methods in the case of nitrates...Also the process of chlorination of wastewater can be used for oxidation of ammonia to nitrogen gas.
The key issues for choosing the treatment technology for TN removal are:
- concentration of TN in the water
- speciation of TN (nitrate, ammonia organic N)
- required final concentration in the effluent after treatment
- amount of water to be treated
without information about them it is difficult to recommend specific technology.
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