Int. J. Renewable Energy & Environmental Engineering
ISSN 2319-5347, ISI Impact Factor: 0.763
VOLUME 02 NO. 04 OCTOBER 2014:
Title: Generation of Ammonia in Deliming Operation from Tannery
and its Environmental Effect: Bangladesh Perspective
Authors: Md. Abul
Hashem, Ahidul Islam, Subrata Paul, Shamima Nasrin
Abstract: The article has focused
on the generation of ammonia from tannery especially in
deliming operation by using conventional deliming agents
such as ammonium chloride and ammonium sulphate. At
hazaribagh, dhaka in bangladesh every day approximately
220mt raw hides and skins are taking for the production
of leather; after unhairing and liming (generally known
as liming) pelt contents lime 1.2-4.4mt from where
yearly 3.5×106–12.8×106 m3 ammonia is produced; about
2.2×106– 8.1×106 m3 of ammonia is merged directly to
atmosphere and about 1.3×106 – 4.7×106 m3 of ammonia is
discharged directly into wastewater at ph 8.5-9.0. The
ammonia containing wastewater finally mixes to the
river, buriganga which causes aquatic problem. It has a
negative impact on environment including human health
effect, exposure of high concentration causes burning of
nose, throat and respiratory tract. In tannery, workers
are directly inhaling high concentration of ammonia
during deliming as well as are suffering at a variety of
difficulties. In atmosphere, ammonia reacts with
available acids such as sulphuric acid (H2SO4), nitric
acid (HNO3) and hydrochloric acid (HCl) to form their
corresponding salts causing cloudiness.
Keywords: Deliming, Ammonia, Ammonium Chloride,
Ammonium Sulphate, Atmospheric
Pages:
266-270