CHLOR ALKALI INDUSTRY

Uğur KÜÇÜKBAYRAKMesut Emrah ÖZTÜRK

Nazenin GÜRESedat KEKEÇ

1) Introduction

Koruma Industry

Koruma Tarım Established in 1949 Derince chloralkali plant in1963 Changed hand to Vefa İbrahim Araci in 1994

Able to provide,

Chloralkali, Agriculture, Transportation Cleaning(products to clean) Packaging Tourism Fields Environmental balance (with St. of ISO 14001.)

Koruma is the first company Having EPKD electricity producer

licenceProduces energy via natural gas

in Derince

Koruma’s Envioronment ViewUsing Energy efficient &

Environmentally friendly technologies Using scare sources Efficiently

1.1) Effluens from Koruma Industry

Cloralkali Industry Wastewater Effluent Types

Domestic Wastewater Industrial Wastewater

Koruma Industry produce Q (Domestic WW )= 70 m3 /d Q (Industrial WW) = 120m3 /d.

 1.2) Domestic Wastewater Treatment System

Flow Diagram

Domestic Wastewater Treatment Plant

Aeration Tank (Aerobic Reactor)

Domestic Wastewater Sedimentation Tank

Baffles At the Effluent DWW

1.3 Industrial Wastewater TreatmentIt is consist of;Coagulation by a rapid mixFlocculation TankSedimentation of FlocsEffluent Discharge

Rapid MixingFerric Chloride is added for floc

formationPolyelectrolyte for aidSulfide Chemical (presence of Cl-)

FlocculationFloc Formation Takes PlaceHigh HRT value for better contact

timePower is supplied by a slow mix

Sedimentation•Sedimentation is applied for settling of precipitates

•Clear Effluent is collected from the surface by a single sided weir

•Collected Effluent is sent to discharge point

Sludge Management

Sludges, collected from clarifiers, are managed seperately

Sand filters are used for sludge thickening

Thicken sludge is collected and disposed by IZAYDAS

Sand Filters

DischargeIWW and DWW effluents are

collected and mixed at discharge point

pH is controlled by a pH meter

Effluent ParametersMeasurements of effluent are

made for discharge standardsDischarged water characteristcs

are proper for the standards

Design CalculationsThere are two types of treatment

processes which include domestic wastewater and industrial wastewater

For domestic wastewater ;Circular Aeration basin

dimensions ; diameter=6mdepth=6m

Circular sedimentation tank calculation

circular sedimentation tank dimensions;

diameter=3mdepth=2meffluent launder=0.3mQ=70m3/day = 0.00081m3/secHRT=Volume / Q =14.1 m3 / (70 m3/d

x d/24 hr) = 4.83 hr

One sided weir is used in treatmentWeir length = (D-2xeff.launder) x π

= (3-0.6) x π = 7,54 mWeir loading = Q / L = (70 m3/d) /

(7.54m) = 9.28 m3 /m.dSurface loading calculation; A = = =7 m2

Surface loading = Q / A =(70 m3/d) / 7 m2 =10 m3/ m2d

For industrial wastewater;Q=120m3 / d = 0.014 m3/secCircular rapid mixing unit basin;Diameter=1 mDepth=1mRectangular flocculation basin

dimensions ;Length=4.5mWidth=1.5mDepth=2.5m

Circular Sedimentation basin Dimension;

Diameter = 4.5mDepth=3mEff.launder=0.5 mRapid mixing unit calculation;HRT= Volume / Q = (0.8 m3) /

(120 m3/d x (d/24 hr) x( hr/ 60 min)) = 9.6 min 

Flocculation unit calculation;Volume = Length x width x depth

= 1.5 x 2.5 x 4.5 =16.875 m3

HRT= Volume / Q = (16.875 m3) / (120 m3/d x (d/24 hr)) = 3.375 hr

Sedimentation Unit calculations;HRT= Volume / Q = (47.7 m3) /

(120 m3/d x (d/24 hr) )= 9.54 hr

References http://circa.europa.eu/Public/irc/env/ippc_brefs/library?

l=/bref_chlor_alkali [Brien-White, 1995] [Ullmann’s, 1996] [Stenhammar] [Kirk-Othmer,1991] [Lindley, 1997] [Ullmann’s, 1996] www.koruma.com www.wikipedia.com

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