Solid state purification of mixed salt obtained from RO rejects at tanneries and textile industries
Student name: Mr Mohammad Shahbaz Khan
Guide: Dr Chander Kumar Singh
Year of completion: 2017
Host Organisation: CSIR-National Environmental Engineering Research Institute (NEERI), Nagpur
Supervisor (Host Organisation): Dr N.N. Rao
Abstract: The industrial sector has grown down the years which developed many innovative technologies,
with this development; pollution has become a major concern which requires attention to
minimize and develop some cost effective along with environment friendly solutions. The study
area Tamil Nadu has maximum number of tanneries and some textile industries where the
common effluent treatment plants (CETPs) are available for their effluent treatment respectively;
but there is a major problem of getting mixed salts from multi stage reverse osmosis rejects
which later concentrated in Multi Effect Evaporators to get the mixed salts in context to Zero
Liquid Discharge (ZLD). The salts are hazardous in nature where it contains some heavy metals
and organic toxics. This study reveals the composition of mixed salt of tannery and textile
industries with the use of advanced techniques which helped to develop an idea about the solid
state purification with the aim to reduce the energy consumption required for thermal treatment.
It is required because without knowing the actual composition, it is difficult to make a judgment
on what should be prioritized. The main aim of the study is to develop catalytic pathways of solid
state purification.
Keywords: Common Effluent Treatment Plants (CETPs), Multi Effect Evaporators (MEEs),
Reverse Osmosis (RO), Zero Liquid Discharge (ZLD), Solid State Purification
