generates about 100,000 m3 of wastewater per day (R.
Suthanthararajan et al.,2004).The main problem faced by
Indian leather industry is the treatment of the waste and the
disposal of the concentrate.
There are a number of technologies which are successfully
used for the treatment of tannery effluent, among them
reverse osmosis is widely used due to its smaller foot print
and modular construction, which allow the combination
with other treatment processes (Chelme-Ayala et al., 2009).
But the direct disposal of RO rejects through traditional
methods results in various environmental impacts, due to
the presence of various chemical agents and remains of raw
materials (Meerganz von Medeazza, 2005). Thus, this paper
gives an overview on various methods which reduces the
environmental impacts of the disposal of RO concentrate.