TDS Reduction and water saving.pdf

LERIG 2004 CLRI C KALYANAM & COLERIG 2004 CLRI C KALYANAM & CO

UNIT OPERATIONS GENERATING TDSUNIT OPERATIONS GENERATING TDS

Beam house operations

Tanyard operations

Dyehouse oerations

Beam house operations

Tanyard operations

Dyehouse oerations

MEASURES ADOPTED TO REDUCE TDSMEASURES ADOPTED TO REDUCE TDS

• Effluent treatment system

• Present leather processing technology

• Process technology for tomorrow

• Effluent treatment system

• Present leather processing technology

• Process technology for tomorrow


0

5000

10000

15000

20000

25000

30000

35000

40000

45000

50000

Soaking Liming Deliming Pickling Cr Tanning Neutn. Dye&Fat

TDS (ppm)

0

5000

10000

15000

20000

25000

30000

35000

40000

45000

50000


TDS (ppm)

0

5000

10000

15000

20000

25000

30000

35000

40000

45000

50000


TDS (ppm)

T D S GENERATIONT D S GENERATION


SOAKING SOAKING

• Huge volume of wastewater

• High level of TDS

• High level of Chloride

•• Huge volume of wastewaterHuge volume of wastewater

•• High level of High level of TDSTDS

•• High level of ChlorideHigh level of Chloride

ProblemsProblems


SOAKING SOAKING

• Evaporation - viable solution• Solar Evaporation - not a complete solution• Mechanical evaporation - high operating cost• Accelerated Evaporation - Viable• Suspended Solids need to be removed• Wet air Oxidation - Viable and effective

•• Evaporation Evaporation -- viable solutionviable solution•• Solar Evaporation Solar Evaporation -- not a complete solutionnot a complete solution

•• MechanicalMechanical evaporation evaporation -- high operating costhigh operating cost•• Accelerated Evaporation Accelerated Evaporation -- ViableViable•• Suspended Solids need to be removedSuspended Solids need to be removed•• Wet air Oxidation Wet air Oxidation -- Viable and effectiveViable and effective

SolutionsSolutions


LIMING LIMING

• Use of Lime and Sulfide

• Pulping or Burning of Hair

•• Use of Lime and SulfideUse of Lime and Sulfide

•• Pulping or Burning of Hair Pulping or Burning of Hair

ProblemsProblems


LIMING LIMING

• Lime with low sludge

• Sulfide free / Less sulfide Enzyme Process

• Hair Saving Process

•• Lime with low sludge Lime with low sludge

•• Sulfide free / Less sulfide Enzyme ProcessSulfide free / Less sulfide Enzyme Process

•• Hair Saving Process Hair Saving Process

SolutionsSolutions


PICKLING PICKLING

• High Chloride

• High TDS

•• High ChlorideHigh Chloride

•• High TDS High TDS

ProblemsProblems


PICKLING PICKLING

• Pickle free Process

• Pickling liquor Recycling

•• Pickle free ProcessPickle free Process

•• Pickling liquor Recycling Pickling liquor Recycling

SolutionsSolutions


CHROME TANNING CHROME TANNING

• High TDS

• Significant level of Chromium

• High Sulfate

•• High TDSHigh TDS

•• Significant level of Chromium Significant level of Chromium

•• High SulfateHigh Sulfate

ProblemsProblems


CHROME TANNING CHROME TANNING

• Enhancing the uptake

• Direct Chrome Liquor recycling

• Recycling and Reuse

•• Enhancing the uptake Enhancing the uptake

•• Direct Chrome Liquor recyclingDirect Chrome Liquor recycling

•• Recycling and ReuseRecycling and Reuse

SolutionsSolutions


WETFINISHING WETFINISHING

• Poor Exhaustion

• Neutral salt content

•• Poor ExhaustionPoor Exhaustion

•• Neutral salt contentNeutral salt content

ProblemsProblems



• Auxiliaries with better exhaustion levels

• Liquid auxiliaries

•• Auxiliaries with better exhaustion levelsAuxiliaries with better exhaustion levels

•• Liquid auxiliariesLiquid auxiliaries

SolutionsSolutions


GENERAL GENERAL

• High fluctuations in pH level - responsible for

salt formation -results high TDS

•• High fluctuations in pH level High fluctuations in pH level -- responsible forresponsible for

salt formation salt formation --results high TDSresults high TDS

ProblemProblem

• Close range pH profile process•• Close range pH profile processClose range pH profile processSolutionSolution


0

1

2

3

4

5

6

7

8


Wastewater (L / Kg)

0

1

2

3

4

5

6

7

8


Wastewater (L / Kg)

0

1

2

3

4

5

6

7

8


Wastewater (L / Kg)

WASTEWATER GENERATIONWASTEWATER GENERATION


SOAKING SOAKING

• Counter Current Soaking•• Counter Current SoakingCounter Current Soaking


LIMING LIMING

• Paste or Paint Liming for unhairing

• Reuse of reliming liquor

•• Paste or Paint Liming for unhairingPaste or Paint Liming for unhairing

•• Reuse of reliming liquorReuse of reliming liquor


DELIMING DELIMING • Reuse of Deliming and Washing liquor•• Reuse of Deliming and Washing liquorReuse of Deliming and Washing liquor

PICKLING PICKLING • Reuse of Pickling liquor•• Reuse of Pickling liquorReuse of Pickling liquor

CHROME TANNING CHROME TANNING • Reuse of Chrome tan liquor•• Reuse of Chrome tan liquorReuse of Chrome tan liquor



• One bath process - water minimization•• One bath process One bath process -- water minimizationwater minimization

Date post:	26-Oct-2015
Category:	Documents
Upload:	sundarapandiyan-sundaramoorthy
View:	19 times
Download:	4 times

TDS Reduction and water saving.pdf

Documents