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
THANK YOU