Progressive Freeze Concentration Research

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Home » Chemical Engineer » Chemical Engineering » pH.D » Review » Study » Progressive Freeze Concentration Research

Progressive Freeze Concentration Research

First of all, I would like to share this good news with all of you. My wife had passed her Ph.D VIVA just now. After the tense preparation few days before, she finally made it. She is now Dr. Mazura Jusoh, researcher in Progressive Freeze Concentration (PFC), a subject under crystallization which is the subset of separation engineering. It was not easy but it went smooth. I felt the tense and waited outside the room.

Before the VIVA starts

The VIVA started at 9.30 am. We arrived at the examination room at 8.30 am to prepare and set up all that are necessary. The VIVA session ended at about 12.15 noon and she passed her Ph.D with minor correction.



In case you are wandering what is this research all about, here is the abstract of the study. Maybe some of you who are interested can collaborate with Dr. Mazura or become her student to further develop the PFC technology which is the first in Malaysia.

Abstract : DEVELOPMENT OF A NOVEL DESIGN FOR PROGRESSIVE FREEZE CONCENTRATION PROCESS

Industrial wastewater may well be treated by freeze concentration, a process which freezes or crystallises out water content as pure ice crystals and leaves behind a highly concentrated solution in a smaller volume. In conventional suspension freeze concentration (SFC) where ice crystals formed as a suspension in the mother liquor, separation of the solid-liquid mixture is difficult and costly. The size of ice crystals is still very limited and the seeding process requires usage of scraped surface heat exchangers (SSFE), which is significantly expensive and accounted for approximately 30% of the capital cost. Progressive freeze concentration (PFC) invented later is believed to provide cost saving and simplify the subsequent ice-liquid separation as ice crystals are formed as a layer or a block on the cooling surface. Quest for a design providing convenience and good efficiencies continues, and in this study a helical structured copper crystalliser was developed and fabricated named Multi-wind Crystalliser (MWC). Effects of several operating conditions on the performance of MWC in context of wastewater treatment were then investigated including circulation flowrate, initial solution concentration, coolant temperature and circulation time. The performance of the design was evaluated by three dependent variables including the effective partition constant, K, calculated from the volume and concentration of the solid and liquid phase. Two other parameters were ice purity and solution volume reduction. A process optimisation was also performed thereafter employing STATISTICA to produce optimum conditions in favour of the stated independent variables. As the crystalliser designed involves heat transfer, the overall heat transfer coefficient was also calculated through temperature profiling subsequently generating a prediction model for ice crystal mass. At the end of the research, a new crystalliser design for PFC is established and an observation of how the operating conditions affect the performance of the system was obtained. Optimum operating conditions was determined by process optimisation and an overall heat transfer coefficients were also generated. Adequacy and reliability of the ice crystal mass prediction model produced was proven by error analyses revealing relatively small errors.

Now...It's my turn to complete my Ph.D... :)

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Ditulis oleh Bidadari, Jumat, 23 Juli 2010 03.30- Rating: 4.5

Judul : Progressive Freeze Concentration Research

Deskripsi : First of all, I would like to share this good news with all of you. My wife had passed her Ph.D VIVA just now. After the tense preparation f...
keyword :Progressive Freeze Concentration Research, Chemical Engineer, Chemical Engineering, pH.D, Review, Study

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