Preparation and characterization of semi-refined carrageenan from Kappaphycus alvarezii seaweed bleached by Peracetic Acid

3rd EMBRIO International Workshop on Marine Biodiversity: Understanding, Utilization, Conservation

生态环境科学

Uju^1^2 ; Prasetyaningsih, E.^1 ; Santoso, J.^1 ; Kamiya, N.^3^4 ; Oshima, T.^5

Department of Aquatic Product Technology, Bogor Agricultural University, Bogor, Indonesia^1

Surfactant and Bioenergy Research Center, Bogor Agricultural University, Bogor, Indonesia^2

Department of Applied Chemistry, Graduate School of Engineering, Kyusu University Motooka, Nishi-ku, Fukuoka, Japan^3

Division of Biotechnology, Center for Future Chemistry, Kyushu University, Motooka, Nishi-ku, Fukuoka, Japan^4

Advanced Business Development Division, Business Strategy Group, Mitsubishi Gas Chemical Company, Inc., Mitsubishi Building, 5-2, Marunouchi 2-chome, Chiyoda-ku, Tokyo

100-8324, Japan^5

关键词: Acid insoluble ash;    Bleaching agents;    Gel strengths;    Kappaphycus alvarezii;    Oxidizing agents;    Peracetic acids;    Sodium hypochlorites;    Sulfate content;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/278/1/012077/pdf
DOI  :  10.1088/1755-1315/278/1/012077

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Semi-refined carrageenan (SRC) is one of the products from Kappaphycus alvarezii, which has the potential to be developed in Indonesia. However, unbleached seaweed will produce SRC with light brown colour due to natural seaweed pigments. Peracetic acid (PAA) is a strong oxidizing agent that has the potential to be used as a bleaching agent in the SRC production. This research aimed to study the effects of the PAA as a bleaching agent on the characteristics of SRC from K. alvarezii. Chopped seaweed was heated in 10% KOH at 80°C for 30 minutes. Bleaching was carried out at room temperature for 90 minutes using PAA at a concentration of 0.5%, 1.5%, and 2.5% (w/w) or using 1.5% (w/w) of sodium hypochlorite. Bleaching using PAA produced SRC whiter than without bleaching and bleaching using sodium hypochlorite. SRC brightness increased with increasing concentrations of PAA and while the yield reduced, as well as the viscosity, gel strength, sulfate content and ash content. The best concentration of PAA was 0.5%. At best, PAA concentration bleaching produced white SRC flour with a lightness value of 80.46±0.01; yield of 23.50%; viscosity 99.33 cP, gel strength 307.63 g/cm2, sulfate 13.29% (w/w), ash 8.33% (w/w) and acid-insoluble ash 1.33% (w/w).