Topic: Study of the issue of NH3-N discharge into surface water streams by small scale industries along with their impacts on aquatic life and proposed recommendation on abatement measures.
Project Summary : Ammonia occurs naturally in water bodies arising from the microbiological decomposition of nitrogenous compounds in organic matter. Fish and other aquatic organisms also excrete ammonia. Ammonia may also be discharged directly into water bodies by some industrial processes or as a component of domestic sewage or animal slurry. Ammonia can also arise in waters from the decay of discharged organic waste.
Ammonia exists in two forms in the water:
a) NH3 ( this is called unionized ammonia )
b) NH4+ ( this is called ionized ammonia )
Together, these two forms of ammonia are called TAN which means total ammonia nitrogen
NH3 is the principal form of toxic ammonia. It has been reported toxic to freshwater organisms, fishes being the most sensitive ones. Treatment technologies need to be developed at cheaper cost so as to conserve and protect the aquatic life.
Objectives of the study
a) To carry out study of the sources of Ammoniacal Nitrogen from Natural, Industrial and Agricultural areas
b) To study their impact on aquatic life, especially on fish toxicity
c) To study issues of Ammoniacal Nitrogen Abatement in industries including chemical methods, airstripping etc.
Gujarat Environment Management Institute (GEMI)
(An Autonomous Institute of Government of Gujarat)
Office of the Director, 3rd Floor, Block no. 13, Dr. Jivraj Mehta Bhavan, Old Sachivalaya,