practical achievements of various technologies for

Practical achievements of various technologies for sustainable leather manufacture in Kanpur Leather Clusters Viswanathan Munusamy 1 , Samir Kumar 1 , Arjun Yadav 1 , Ivan Kral 2 Aamir Awsaf 3 , Imran Siddiqui 4 , Farhan Ajmal 5 , Gulrez Usmani 6 , Asad K. Iraqi 7 1 Kanpur Leather Development Project, UNIDO, 2 UNIDO, Vienna, 3 Kings International Limited, 4 Super Tannery Ltd, 5 Calico Impex, 6 Leayan Global, 7 AKI Tannery Poster No. 171 IULTCS XXXIV 2017 INDIA With the overall objective to enable local leather-based industry to sustain conversion of locally available raw hides and skins into exportable products without jeopardizing the livelihood of the human settlements and supplementing various ongoing activities to achieve total environmental security, the UNIDO Kanpur Leather Development Project has been demonstrating various cleaner tanning technologies in volunteer tanneries. PDU1: Hair save unhairing/liming 0% 100% Reduction of pollution load in liming wastewater while adopting hair save unhairing 32% 37% 66% 61% 0% 20% 40% 60% 80% COD BOD Sulphide Total suspended solids • In the liming/unhairing bath, hair is loosened and not allowed to dissolve and loosened hair is filtered out in hair filtering machine • About 1.8% of hair on the weight of raw hides is filtered from Indian origin buffalo hides • The removal of hair help reduce quantity of sulphide PDU2: Water mixing and measurement • Visual judgement of water consumption as adopted in several small sized tanneries leads to higher consumption levels by 50 to 200 percentage points • Three types of measurement options demonstrated - water flow meters, electromagnetic flow meters and automatic water mixing cum addition systems • Measuring water reduced the water consumption by 20 to 30% • Reduction of quantum of pollutants like COD and TDS by 15% and 10% in post tanning waste streams PDU3: Solar water heating system • Capacity: 7000 litres per day @ 60 0 C on annual average • Area: 192 m 2 • Type of collectors: Evacuated tubes • Energy savings: 725 GJ/annum • CO 2 reduction: 97 tonnes per annum PDU4: Solar air heating system • Capacity: 75000 kcals/hour on annual average • Area: 270 m 2 • Type of collectors: Aluminium capsulated chamber • Energy savings: 847 GJ/annum • CO 2 reduction: 114 tonnes per annum PDU5: Processing chilled hides • Reduction in TDS in soak liquor: up to 40,000 mg/l • Reduction in TDS: minimum of 300 kg/t • Potential for TDS in Kanpur cluster: 90 t/d Wetblue produced from chilled hide processing PDU6: Desalting • Dusted salt recovery: 60 to 90 kg/t of raw material • Reduction in TDS by 25000: mg/l • Overall TDS reduction: 15-20% PDU7: Lime liquor recycling system • Recovery of relime liquor: 80% out of 125% float • Reduction in water consumption less by 800 l/t • Savings in chemicals-lime 0.3- 0.5% • Annual savings in water consumption up to 600 m3 Rainwater harvesting Rain water catchment area is approximately 3500 m 2 and per season about 7564 thousand gallons of rain water filtered from 47 different points is estimated to be deposited to the under-ground water

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Page 1: Practical achievements of various technologies for

PracticalachievementsofvarioustechnologiesforsustainableleathermanufactureinKanpurLeatherClusters

Viswanathan Munusamy1, Samir Kumar1, Arjun Yadav1, Ivan Kral2Aamir Awsaf3, Imran Siddiqui4, Farhan Ajmal5, Gulrez Usmani6, Asad K. Iraqi7

1KanpurLeatherDevelopmentProject,UNIDO, 2UNIDO, Vienna,3KingsInternationalLimited,4SuperTanneryLtd,5CalicoImpex,6LeayanGlobal,7AKITannery

PosterNo.

171IULTCSXXXIV2017INDIA

Withtheoverallobjectivetoenablelocalleather-basedindustrytosustainconversionoflocallyavailablerawhidesandskins intoexportableproductswithoutjeopardizingthelivelihoodofthehumansettlementsandsupplementingvariousongoingactivities toachievetotalenvironmentalsecurity,theUNIDOKanpurLeatherDevelopmentProjecthasbeendemonstratingvariouscleanertanningtechnologiesinvolunteertanneries.

PDU1:Hairsaveunhairing/liming

0% 100%

Reduction of pollution load in liming wastewater while adopting hair save unhairing

32% 37% 66% 61%

20%

40%

60%

80%

COD BOD Sulphide Totalsuspended

solids

• Intheliming/unhairingbath,hairisloosenedandnotallowedtodissolveandloosenedhairisfilteredoutinhairfilteringmachine

• About1.8%ofhairontheweightofrawhidesisfilteredfromIndianoriginbuffalohides

• Theremovalofhairhelpreducequantityofsulphide

PDU2:Watermixingandmeasurement

• Visualjudgementofwaterconsumptionasadoptedinseveralsmallsizedtanneriesleadstohigherconsumptionlevelsby50to200percentagepoints

• Threetypesofmeasurementoptionsdemonstrated- waterflowmeters,electromagneticflowmetersandautomaticwatermixingcumadditionsystems

• Measuringwaterreducedthewaterconsumptionby20to30%• ReductionofquantumofpollutantslikeCODandTDSby15%and10%

inposttanningwastestreams

PDU3:Solarwaterheatingsystem

• Capacity:7000litresperday@600Conannualaverage• Area:192m2

• Typeofcollectors:Evacuatedtubes• Energysavings:725GJ/annum• CO2 reduction:97tonnesperannum

PDU4:Solarairheatingsystem

• Capacity:75000kcals/houronannualaverage• Area:270m2

• Typeofcollectors:Aluminium capsulatedchamber• Energysavings:847GJ/annum• CO2 reduction:114tonnesperannum

PDU5:Processingchilledhides• ReductioninTDSinsoak

liquor:upto40,000mg/l• ReductioninTDS:minimum

of300kg/t• PotentialforTDSinKanpur

cluster:90t/dWetblueproducedfromchilledhideprocessing

PDU6:Desalting

• Dustedsaltrecovery:60to90kg/tofrawmaterial

• ReductioninTDSby25000:mg/l

• OverallTDSreduction:15-20%

PDU7:Limeliquorrecyclingsystem

• Recoveryofrelimeliquor:80%outof125%float

• Reductioninwaterconsumptionlessby800l/t

• Savingsinchemicals-lime0.3-0.5%

• Annualsavingsinwaterconsumptionupto600m3

Rainwaterharvesting

Rainwatercatchmentareaisapproximately3500m2 andperseasonabout7564thousandgallonsofrainwaterfilteredfrom47differentpointsisestimatedtobedepositedtotheunder-groundwater

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