Effect of Freezing Time and Shaking Speed on the Performance of Progressive Freeze Concentration via Vertical Finned Crystallizer

Amran, Nurul Aini; Samsuri, Shafirah; Jusoh, Mazura

doi:10.15282/ijame.15.2.2018.15.0412

Cited by 11 publications

(19 citation statements)

References 32 publications

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“…They claimed that the highest purity of solids could be achieved by prolonging the duration of the PFC process. Azman et al [ 47 ] showed a similar finding, where the highest solute recovery (96%) was observed at the PFC operating time of 50 min. This statement was supported by Safiei et al [ 48 ], where the higher concentration efficiency would be obtained at a longer PFC operating time.…”

Section: Discussionsupporting

confidence: 52%

Saponin Stabilization via Progressive Freeze Concentration and Sterilization Treatment

2021

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Saponin is a biopesticide used to suppress the growth of the golden apple snail population. This study aims to determine the stabilized conditions for saponin storage. The maceration process was used for saponin extraction, and for saponin concentration, progressive freeze concentration (PFC) was used. Afterwards, stability analysis was performed by storing the sample for 21 days in two conditions: Room temperature (26 °C) and cold room (10 °C). The samples kept in a cold room were sterilized samples that undergo thermal treatment by placing the sample in the water bath. The non-sterilized samples were kept in room temperature condition for 21 days. The results showed that saponin stored in the cold room (sterilized sample) has low degradation with higher concentration than those stored at room temperature in stability analysis with the highest saponin concentration (0.730 mg/mL) at a concentration temperature of −6 °C and concentration time of 15 min. The lowest saponin concentration obtained by saponin stored at room temperature (non-sterilized sample) is 0.025 mg/mL at a concentration temperature of −6 °C and concentration time of 10 min. Thus, the finding concluded that saponin is sensitive to temperature. Hence, the best storage condition to store saponin after thermal treatment is to keep it in a cold room at 10 °C.

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Section: Discussionsupporting

confidence: 52%

Saponin Stabilization via Progressive Freeze Concentration and Sterilization Treatment

2021

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“…If concentration of the solute in the concentrate is considered, the longer duration could produce higher solute concentration in the concentrate, in which higher efficiency is achieved . Moreover, Amran et al (2018) reported the same results where the highest solute recovery (96%) with the lowest effective partition constant ( K ) was obtained at 50 min circulation time . A thicker layer of solids was obtained through longer the freezing time.…”

Section: Results and Discussionmentioning

confidence: 90%

“…The optimum conditions obtained in this study aligned with the past studies, where the lower coolant temperature, higher freezing time, and circulation flowrate are favorable in the PF process. 40,41 The predicted and experimental values for the residual oil recovery from the POME model were obtained as 92.56 and 93.2% at optimum conditions, respectively. The results achieved are relevant to another optimization study of enzymatic sludge palm oil recovery reported by Norhayati (2013), where 81.95% residual oil was recovered with an R-squared value of 0.852.…”

Section: Regression Model Equation and Anovamentioning

confidence: 91%

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Optimization of Progressive Freezing for Residual Oil Recovery from a Palm Oil–Water Mixture (POME Model)

2021

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Oil and grease remain the dominant contaminants in the palm oil mill effluent (POME) despite the conventional treatment of POME. The removal of residual oil from palm oil−water mixture (POME model) using the progressive freezing process was investigated. An optimization technique called response surface methodology (RSM) with the design of rotatable central composite design was applied to figure out the optimum experimental variables generated by Design−Expert software (version 6.0.4. Stat-Ease, trial version). Besides, RSM also helps to investigate the interactive effects among the independent variables compared to one factor at a time. The variables involved are coolant temperature, X A (4−12 °C), freezing time, X B (20−60 min), and circulation flow, X C (200−600 rpm). The statistical analysis showed that a two-factor interaction model was developed using the obtained experimental data with a coefficient of determination (R 2 ) value of 0.9582. From the RSM-generated model, the optimum conditions for extraction of oil from the POME model were a coolant temperature of 6 °C in 50 min freezing time with a circulation flowrate of 500 rpm. The validation of the model showed that the predicted oil yield and experimental oil yield were 92.56 and 93.20%, respectively.

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“…Higher RPM reduced the time of contact between the fluid and cooling surface due to flow velocity causing a reduction in cooling effect, temperature deference becomes lower. That's why for the higher cooling effect the length of the tube should be longer but that will cause more pressure drop on slower RPM, or rise the contact surface area of the cooling surface for the same length [39]. The investigation study shows a pressure drop influence through IHE flow compare with initial engine airflow inlet pressure, the temperature reduction influenced the air density property influencing air volumetric size at constant mass air flow and constant combustion volume to be reduced, leading to change in air molecular pressure, as the temperature is directly proportional to volume ( ∝ , ∝ and .…”

Section: Cfd Ihe Casementioning

confidence: 99%

Development of evaporative intercooler heat exchanger for vehicle charge air enhancement using CFD simulation

Sharif

Hairuddin

As'ary

et al. 2019

JMES

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Nowadays, the concern of vehicle manufacturers towards improving engine performance, reducing fuel consumption and exhaust emissions that can cause the pollution of the atmosphere, concerns of strict emission pollution control regulations. Intercooler heat exchanger devices are used for engine charge air temperature improving for engine performance and emissions reduction. This paper introduces a new add-on technology of intercooler heat exchanger- (IHE) developed for utilizing in intake charge air density enhancement in engine combustion for better performance. Presenting a challenge in contributing a framework process for geometry designing development procedure for accurate and reliable scale design size of an air-vapour gas shell-and-tube IHE type, used refrigerant coolant medium. The process presents effective IHE in design time consumption, accurate in scale with higher performance and reliability operation in all environment weather due to reversibility system. A selected design geometry of 60 bunches of tubes with 7.53 mm inner diameter and 150 mm long placed. Effectiveness and design parameter geometry calculation are conditions of the IHE dependent relations of the shell size to tube length in condition of engine space availability control. Pressure drop and cooling capacity of IHE configuration design are proportional to the availability of design space or pressure drop control by the engine. Numerical and simulation results expressed a significant ability of IHE of 2–13 kW cooling load and process applicability for qualified design geometry configuration for selected IHE type. The developments present significant geometry flexibility design with the ability of cooling load or heating effect if reversible system, which offered multipurpose use in widely all vehicle types.

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Effect of Freezing Time and Shaking Speed on the Performance of Progressive Freeze Concentration via Vertical Finned Crystallizer

Cited by 11 publications

References 32 publications

Saponin Stabilization via Progressive Freeze Concentration and Sterilization Treatment

Saponin Stabilization via Progressive Freeze Concentration and Sterilization Treatment

Optimization of Progressive Freezing for Residual Oil Recovery from a Palm Oil–Water Mixture (POME Model)

Development of evaporative intercooler heat exchanger for vehicle charge air enhancement using CFD simulation

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