Optimization Of Coagulation Process To Treat Rubber Industry Effluent
Using Natural Coagulant (Kalanchoe Pinnata)
Presentation Outline
Problem statement and objective
Introduction
Methodology
Result and discussion
Conclusion
Problem statement
Objective
To study the performances of natural coagulant in term of turbidity removal and cod reduction
To determine the capability of the Setawar leaves as natural coagulant in treating rubber effluent.
To obtain optimum condition in term of dosage and pH of natural coagulant in treating rubber effluent
Introduction
Coagulation
Treatment Methods BOD COD TOC Turbid Colour Coli NH3-N
Primary treatment x x x x O o
Activated Sludge + + + + x + +
Nitrification + + + + x + +
De-nitrification o o o o x
Tricking filter + + x x O o
Coagulation-Flocculation + + + + + + o
Filtration A/S x x x x x x
GAC adsorption + x + + + + x
Ion exchange x x o o +
Chlorination + +
Ozone o + x +
Symbols: o = 25% removal of influent concentration, x = 25-50%, + = > 50%. Blank denoted no data
Table 1: Comparison of waste water treatment method that commonly used. (Metcalf & Eddy, 1991)
Coagulation basically is a process used to destabilize the particle found in waters so that they may be removed by subsequent separation process
Kalanchoe Pinnata
Use as natural coagulant in this rersearch
Why kalanchoe pinnata choosen
Easy to grow
Low cost
Environmental friendly
New plant in the natural coagulant field
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Kalanchoe Pinnata leaves
Rubber wastewater
One of the hazardous waste water
Has high COD , turbidity and pose threat when release to the environment
Table.1.1 Typical characteristic of wastewater from rubber processing(source India central pollution control board, 2001)
Response Surface Method
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Design of experiment are done using fix parameter.
Analysis of RSM are done when data are collected
Optimization analyze from the data collected
Methodology
Design of experiment
Collection and Preservation of Samples
Preparation of Coagulants
Experimental Procedure Coagulation studies at different conditions
Sample Analysis Turbidity Test
COD Test
Suspended Solid Test
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Rubber Wastewater treatment using
Kalanchoe Pinnata
Part Two
Part OnePart
Three
Collecting wastewater and
preparation of natural
coagulant
Wastewater collected
and preserve at 4C
Natural coagulant
are dried using
sun
Dries leaves are
grind ,sieved and
stored in a
vacumm container
Design of experiment
using Design Expert
Parameter , dosage pH
are determined
Design of experiment
are done using fix
parameter
Preparation of natural
coagulant solution ,pH
modifier and flocculant
aid
JAR test : fast
mixing 120rpm,
slow mix 40rpm
Analysis of supernatant
from treated wastewater
Turbidity testCOD test
Suspended solid test
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JAR test machine
Result and discussion
Trend
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Optimization (RSM)
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Discussion
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several factors that can affect the natural coagulant ability to coagulatealkalinitytemperature time Dosage of natural coagulant
four primary mechanism of coagulant which is enmeshment, adsorption, charge neutralization/destabilization and complexation/precipitation.
(Pernitsky, 2003)
coagulation will happen via Van der Waals force, which refers to the tendency of particle in nature to attract each other weakly if they did not
have charge
Na OH
Waste water
OH
Na OH
Waste water
OH
Unknown compound
/
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Conclusion and Recommendation
Conclusion
Kalanchoe Pinnata can work as a natural coagulant
It best work at alkali condition
High amount dosage of natural coagulant , higher removal efficiency
Recommendation
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Used wider range for natural coagulant dosage
Use higher concentration of natural coagulant
Conduct a study on harvesting time for Kalanchoe Pinnata
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