Mohd Al-Hafiz Mohd Nawi
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Preferred name
Mohd Al-Hafiz Mohd Nawi
Official Name
Mohd Al-Hafiz , Mohd Nawi
Alternative Name
Hafiz, M. A.
Nawi, M. A.H.M.
Nawi, M. A.M.
Nawi, Mohd Al Hafiz Mohd
Nawi, M. H.
Main Affiliation
Scopus Author ID
57195980205
Researcher ID
IOU-7551-2023

Research Output

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  • Publication
    Design of a Low-cost IoT-based Biofloc Water Quality Monitoring System
    ( 2024-02-01)
    Bakhit A.A.
    ;
    Jamlos M.F.
    ;
    Nordin M.A.H.
    ;
    Mohd Aminudin Jamlos
    ;
    Mamat R.
    ;
    Mohd Al-Hafiz Mohd Nawi
    ;
    Nugroho A.
    This paper proposes an IoT-based BFT water monitoring system that can measure water parameters such as pH, DO, TDS, and EC. The collected data is displayed remotely via the BLYNK cloud and Node-RED via an MQTT broker. Moreover, a mobile application monitors all water parameters in real-time, notifying users when a parameter exceeds the ideal value. This study suggests that the proposed system based on IoT is an excellent option for a cost-effective BFT system.
  • Publication
    The modified phase inversion and sintering technique for fabrication of ceramic membrane: Influence of kaolin composition and drying temperature
    ( 2021-05-03)
    Mohd Riduan Jamalludin
    ;
    Siti Nor Azreen Ahmad Termizi
    ;
    Khor Chu Yee
    ;
    Hubadillah S.K.
    ;
    Mohd Al-Hafiz Mohd Nawi
    ;
    Ishak M.I.
    ;
    Rosli M.U.
    The practical use of ceramic membrane has been limited by their fabrication technique and brittleness. Nowadays, phase inversion and sintering technique for ceramic membrane fabrication has been received widely attention. However, the unavoidable unstable structure for fabrication of flat-sheet ceramic membrane using this technique is still becoming an issue. To overcome this problem, in this paper, flat-sheet ceramic membrane have been developed via modified phase inversion and sintering technique using kaolin as main ceramic material, polyethersulfone (PESf) as the polymeric binder and N-methylpyyrolidone (NMP) as the solvent, respectively. The modified phase inversion has been done by adding drying process before the immersion into solvent. The influence of kaolin composition (60-80g) and drying temperature (room temperature and 3oC) have been investigated extensively to optimize the preparation. The results showed that the ceramic membrane prepared at 80g kaolin composition with drying temperature of 3oC displayed the highest bending strength of 53.1g with excellent BSA and humic acid rejection. Therefore, this study proved that the problem of unstable fabrication technique for flat-sheet ceramic membrane can be solved via modified phase inversion through the influence of high composition and low drying temperature.
  • Publication
    Spray Drying Optimization for Rice Bran Protein (RBP) Powder Using Response Surface Methodology (RSM)
    ( 2022-01-01)
    Mansor M.R.
    ;
    Mohd Sharizan Md Sarip
    ;
    Syahrul Affandi Saidi
    ;
    Wan Azani Wan Mustafa
    ;
    Mohd Al-Hafiz Mohd Nawi
    ;
    Mohd Aminudin Jamlos
    Rice bran is a by-product of the rice milling process which contain a high concentration of protein. It’s are often used as a feed cattle, fertilizer, and fuel. Its application as a source of human nutrition is rare due to high lipid concentration. This lipid concentration can be reduced through the extraction process. After the extraction process, the rice bran extract needs to be converted into powder form through a drying process for the quality preservation. In this study, spray drying is utilized as drying technique. The aims of this study were to optimize the spray drying parameter; inlet temperature, feed flowrate and air flowrate for rice bran protein (RBP) powders production. Box Behnken Design (BBD) model in response surface methodology (RSM) are utilized in this study to maximize the RBP powder yield and protein concentration. Raw rice bran (RRB) was extracted using thermal water-based extraction method before the drying process. The optimum condition suggested by the model are at the inlet temperature of 120oC, feed flowrate of 18.38% and air flowrate of 670 L/hr which produced RBP powder yield of 19.42 g RBP/100g RRB and protein concentration of 17.32 mg/ml. The model obtains in this study show a low error between the predicted value and experimental data at 1.68 % and 1.14 % for RBP powder yield and protein concentration respectively. The model can be used to evaluate the process characteristic and understanding.
  • Publication
    Preparation of Rice Bran Protein (RBP) Powder Using Spray Drying Method at the Optimal Condition and Its Protein Quality
    ( 2022-10-01)
    Mansor M.R.
    ;
    Mohd Sharizan Md Sarip
    ;
    Nik Daud N.M.A.
    ;
    Saidi S.A.
    ;
    Mohd Al-Hafiz Mohd Nawi
    ;
    Mohd Aminudin Jamlos
    Rice bran is a by-product of the rice milling process. It contains a high concentration of protein. Rice brans are frequently utilized as feed cattle, fertilizer, and fuel. However, their application as human nutrition supplements is uncommon, and the necessary process for this purpose is yet to be established, including the drying process. This study aims to evaluate the effect of the spray-drying parameters, the inlet temperature, inlet flowrate, and inlet air flowrate, on rice bran protein (RBP) powder and optimize it using response surface methodology (RSM). A thermal water-based extraction method was utilized prior to the drying process. The correlation between the spray-drying parameters, i.e., the inlet temperature (120 to 210 °C), feed flowrate (5 to 55%), and air flowrate (246 to 670 L/h), and the RBP yield were investigated. The quality of the RBP powder was evaluated based on acid amino profiling in the mixture through de novo peptide sequencing. The optimized operating conditions for the maximum yield of RBP powder (25.7 g RBP/100 g RRB) are 178 °C, feed flowrate of 25%, and air flowrate of 450 L/h. The main peptides that contribute to RBP powder protein are globulin and glutelin; meanwhile, prolamin is believed to degrade during the drying process. The process also produced protein sugar, helping to produce fine particles powder without the drying agent.