Leather/Skin/Hide Processing Industry - Environmental Clearance

Leather / Skin / Hide Processing Industry (Tannery)Chrome precipitated from post-tanning operationsViable uses for all the above wastes need to be established.3.5 Summary of Applicable National RegulationsThere are well-defined regulatory requirements which imply that the government mustregulate various aspects of the operations and construction of leather / skin / hideprocessing industries to reduce their environmental and social impacts.3.5.1 General standards for discharge of environmental pollutantsGeneral standards for discharge of environmental pollutants as per CPCB is given inAnnexure I.3.5.2 Tannery effluent standards as provided by CPCBTable 3-6: Tannery Effluent Standard (After Primary Treatment): DisposalChannel/Conduit Carrying Wastewater to Secondary Treatment PlantType of Tanneries Parameter Concentration limit not exceed,mg/l ( except pH)Chrome tanneries /Combined chrome andvegetable tanneriesPH 6.5 – 9.0SS Not to exceed 600Cr concentration aftertreatment in the chromewaste water streamVegetable tanneries pH 6.5 – 9.0SS Not to exceed 600NOTE: The above standards will apply to those tannery units, which have made fullcontribution to a CETP comprising secondary treatment. Those who have not contributed willbe governed by earlier Notification No.. S.O. 64 (E) dated January 18, 1988.Source: EPA Notification [G.S.R 742(E) dt. 30th Aug; 1990]45Table 3-7: Tanneries – Effluent StandardsPollutant Concentration in mg/l, except pH Quantum per rawhide processedPH 6.5 – 9.0 -* BOD (at 27 o C, 3 days) 100 -Suspended Solids 100 -Sulphides (as S) 1 -Total Cr (as Cr) 2 -Oil and Grease 10 -TGM for Tanneries August 20103-27