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Cationized tannin-based coagulant from Acacia mearnsii as an alternative to alum coagulants

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Marcelo Cristo

on 17 June 2015

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Transcript of Cationized tannin-based coagulant from Acacia mearnsii as an alternative to alum coagulants

Aim and objectives
The aim of this project is to evaluate the use of a natural organic coagulant from cationized
Acacia mearnsii
tannin in the water treatment and compare it with alum compounds.
Methodology
Final Considerations
Cationized tannin-based coagulant from
Acacia mearnsii
as an alternative to alum coagulants

Introduction
Objectives
Investigate amine compound
Evaluate the effectiveness of tannin-based coagulant
Compare with Alum compounds
Evaluate the sludge production
Background
Motivation
Water treatment
Coagulation
Cationization
Economically viable
Biodegradable
Link between Alum compounds and Alzheimer’s disease.
(Flaten 2001)
Variables
Cationization Process
Preliminary dosage study
Jar-testing: Mixing and Settling
Coagulation Diagram
Jar-testing: analysis of each coagulant
Varying Mixing
Mixing Time
Rapid
Slow

Mixing Speed
Rapid
Slow
Amine Compound:
Ammonium chloride
Diethanolamine

Doses

Tannin Concentration

Aldehyde: Formaldehyde
Coagulation Process
Varying mixing time

Varying mixing speed

Raw water pH

Temperature

Coagulant Doses
Cationized Tannin
Alum compound
Turbidity
Define the optimum concentration of coagulant for the tested water.
Turbidity
Preliminary Cationization study
Tannin extract (not the aim)

Concentration of Tannin extract

Ratio Tannin-amine
Turbidity
Jar-testing
(Hillis, 1997)
Turbidity
Comparison

Water treatment is a solution in order to enhance water quality for drink or other purpose

Raw water maybe not suitable
Acacia: Indigenous from Australia
Worldwide spread
Simple extraction of tannin
Raw Water
Water from Adelaide water treatment plant

River Murray
Cationized Tannin
Alum Compound
Turbidity
DOC
Sludge
Budget
Tannin Extract = less than AU$1/20mg
Amine compounds
Turbidity and DOC analisys
Timetable
Literature Review
Preliminary Studies
Jar-testing and analysis
Conclusion
Coagulation is a important part of water treatment
Cationized Acacia tannin have several advantages when used as coagulant
Cationized Acacia Tannin is an alternative to alum compounds for the coagulation process.
Objectives:
Evaluation of Amine compound
Comparison with Alum

Any questions?
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