scholarly journals Process Optimization of Effective Partition Constant in Progressive Freeze Concentration of Wastewater

2013 ◽  
Vol 03 (04) ◽  
pp. 286-293 ◽  
Author(s):  
Mazura Jusoh ◽  
Anwar Johari ◽  
Norzita Ngadi ◽  
Zaki Yamani Zakaria
Keyword(s):  
Process Optimization ◽  
Partition Constant ◽  
Freeze Concentration

Effect of Circulation Flowrate on the Performance of a Spiral Finned Freeze Concentrator

2014 ◽  
Vol 695 ◽  
pp. 455-458
Author(s):  
Samsuri Shafirah ◽  
Amran Nurul Aini ◽  
Norzita Ngadi ◽  
Zaki Yamani Zakaria ◽  
Jusoh Mazura
Keyword(s):  
Surface Area ◽  
Concentrate Solution ◽  
Liquid Solution ◽  
System Efficiency ◽  
Ice Crystal ◽  
Partition Constant ◽  
Freeze Concentration ◽  
Effective System

Progressive freeze concentration (PFC) has emerged as a viable technology for concentration of liquid solution. In this study, a newly designed spiral finned crystallizer to improve productivity of PFC process was proposed. The spiral fin is presented based on the advantage of additional surface area to the spiral finned crystallizer. The performance of spiral finned crystallizer was analysed by the system efficiency and the effect of circulation flowrate. It was found that the efficiency of the system has significantly improved in terms of a lower effective partition constant and a higher recovered solute. An effective partition constant of 0.35 and a recovered solute of approximately 0.96 g of glucose per 1 g of initial glucose were obtained. Thus, spiral finned crystallizer for PFC system is evidently an effective system to concentrate solution and to produce pure ice crystal.

Progressive Freeze Concentration of Coconut Water: Effect of Circulation Flowrate and Circulation Time

2014 ◽  
Vol 67 (3) ◽  
Author(s):  
Mazura Jusoh ◽  
Noor Naimah Mohamed Nor
Keyword(s):  
Conventional Method ◽  
Experimental Work ◽  
Sugar Content ◽  
Coconut Water ◽  
Circulation Time ◽  
Water Effect ◽  
K Value ◽  
Partition Constant ◽  
Freeze Concentration

Progressive freeze concentration integrated with a coil crystallizer was applied to concentrate coconut water in order to increase its sugar content. In progressive freeze concentration system, only a single ice is formed as a layer on cooled surface. It is introduced as an alternative in compensating the disadvantages of conventional method of freeze concentration, called suspension freeze concentration. In this research, the efficiency of the progressive freeze concentration system was determined through effective partition constant (K) value and percent increment of sugar content. Hence, the effect of circulation flowrate ranging from 2000 to 2800 ml/min and circulation time from 10 to 18 minutes on those two variables was then investigated through experiments designated using one factor at a time. From the experimental work, it was found that higher efficiency results at higher circulation flowrate of 2800 ml/min based on lower K and high percentage of sugar increment achieved. It was also found that the percentage of the sugar increment is high when the period given for circulating the solution is increased and the most suitable circulation time is 14 minutes.

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