The performance of progressive freeze concentration for water purification using rotating cylindrical crystalliser with anti-supercooling holes

The performance of progressive freeze concentration for water purification using rotating cylindrical crystalliser with anti-supercooling holes

Progressive freeze concentration (PFC) is a freeze concentration method which forms ice crystals as a layer or a block on a cooled surface, which can be applied in purification of seawater to obtain pure water in ice form and leave the impurity behind. The aim of this study is to design a rotating c...

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Main Author: Ab. Hamid, Farah Hanim
Format: Thesis
Language:English
Published: 2016
Subjects:
TP Chemical technology
Online Access:http://eprints.utm.my/id/eprint/84032/1/FarahHanimAbPFChE2016.pdf
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spelling my-utm-ep.840322019-11-05T04:35:52Z The performance of progressive freeze concentration for water purification using rotating cylindrical crystalliser with anti-supercooling holes 2016-05 Ab. Hamid, Farah Hanim TP Chemical technology Progressive freeze concentration (PFC) is a freeze concentration method which forms ice crystals as a layer or a block on a cooled surface, which can be applied in purification of seawater to obtain pure water in ice form and leave the impurity behind. The aim of this study is to design a rotating cylindrical crystalliser with anti-supercooling holes in order to prevent supercooling phenomenon as well as to improve the solution movement in the crystalliser to increase productivity of the PFC system. Prevention of supercooling is important as it will affect the purity of ice produced. The performance analysis was carried out by using saline solution as simulated seawater, and was evaluated by the value of effective partition constant (K), desalination rate (Rd), efficiency (E %) and solute recovery (Rs). The system performance was found to be at its best at 300 rpm of rotation speed, four hours of rotation time, coolant temperature at -8 °C and 35 g/L of initial concentration with K value, E%, Rd and Rs of 0.376, 62.37%, 35.71% and 0.672, respectively. Low K value, high E%, high Rd and high Rs represent the best performance due to higher purity of ice crystal produced. Response surface methodology (RSM) in STATISTICA software was employed for optimisation process to obtain the optimum conditions in producing the best K value and Rd. Due to the limitation of optimization process by RSM offered by STATISTICA, a hybrid Artificial Neural Network and Genetic Algorithm in MATLAB was implemented for multiple response optimisations, where the best K value and Rd predicted were 0.26 and 49%, respectively. A mathematical heat transfer model in predicting ice crystal growth at different coolant temperature was successfully developed with an Average Absolute Relative Deviation of 5.56% and R2 value of 0.873. This newly designed crystalliser was found to be capable of producing ice crystals with high efficiency and productivity. 2016-05 Thesis http://eprints.utm.my/id/eprint/84032/ http://eprints.utm.my/id/eprint/84032/1/FarahHanimAbPFChE2016.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:125959 phd doctoral Universiti Teknologi Malaysia, Faculty of Chemical and Energy Engineering Faculty of Chemical and Energy Engineering
institution Universiti Teknologi Malaysia
collection UTM Institutional Repository
language English
topic TP Chemical technology
spellingShingle TP Chemical technology
Ab. Hamid, Farah Hanim
The performance of progressive freeze concentration for water purification using rotating cylindrical crystalliser with anti-supercooling holes
description Progressive freeze concentration (PFC) is a freeze concentration method which forms ice crystals as a layer or a block on a cooled surface, which can be applied in purification of seawater to obtain pure water in ice form and leave the impurity behind. The aim of this study is to design a rotating cylindrical crystalliser with anti-supercooling holes in order to prevent supercooling phenomenon as well as to improve the solution movement in the crystalliser to increase productivity of the PFC system. Prevention of supercooling is important as it will affect the purity of ice produced. The performance analysis was carried out by using saline solution as simulated seawater, and was evaluated by the value of effective partition constant (K), desalination rate (Rd), efficiency (E %) and solute recovery (Rs). The system performance was found to be at its best at 300 rpm of rotation speed, four hours of rotation time, coolant temperature at -8 °C and 35 g/L of initial concentration with K value, E%, Rd and Rs of 0.376, 62.37%, 35.71% and 0.672, respectively. Low K value, high E%, high Rd and high Rs represent the best performance due to higher purity of ice crystal produced. Response surface methodology (RSM) in STATISTICA software was employed for optimisation process to obtain the optimum conditions in producing the best K value and Rd. Due to the limitation of optimization process by RSM offered by STATISTICA, a hybrid Artificial Neural Network and Genetic Algorithm in MATLAB was implemented for multiple response optimisations, where the best K value and Rd predicted were 0.26 and 49%, respectively. A mathematical heat transfer model in predicting ice crystal growth at different coolant temperature was successfully developed with an Average Absolute Relative Deviation of 5.56% and R2 value of 0.873. This newly designed crystalliser was found to be capable of producing ice crystals with high efficiency and productivity.
format Thesis
qualification_name Doctor of Philosophy (PhD.)
qualification_level Doctorate
author Ab. Hamid, Farah Hanim
author_facet Ab. Hamid, Farah Hanim
author_sort Ab. Hamid, Farah Hanim
title The performance of progressive freeze concentration for water purification using rotating cylindrical crystalliser with anti-supercooling holes
title_short The performance of progressive freeze concentration for water purification using rotating cylindrical crystalliser with anti-supercooling holes
title_full The performance of progressive freeze concentration for water purification using rotating cylindrical crystalliser with anti-supercooling holes
title_fullStr The performance of progressive freeze concentration for water purification using rotating cylindrical crystalliser with anti-supercooling holes
title_full_unstemmed The performance of progressive freeze concentration for water purification using rotating cylindrical crystalliser with anti-supercooling holes
title_sort performance of progressive freeze concentration for water purification using rotating cylindrical crystalliser with anti-supercooling holes
granting_institution Universiti Teknologi Malaysia, Faculty of Chemical and Energy Engineering
granting_department Faculty of Chemical and Energy Engineering
publishDate 2016
url http://eprints.utm.my/id/eprint/84032/1/FarahHanimAbPFChE2016.pdf
_version_ 1747818428768452608

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