algerian journal of environmental science and technology
Volume 3, Numéro 1, Pages 29-36

Kinetic Study Of Bio-demineralization And Bio-‎deproteinization Of Shrimp Biowaste For Chitin Recovery

Authors : Arbia W . Arbia L . Adour L . Lounici H . Mameri N .


Demineralization (DM) and deproteinization (DP) of shrimp shell ‎Parapenaeus longirostris using Lactobacillus helveticus, depends ‎on the composition of culture medium, and temperature of ‎incubation. In a synthetic medium containing glucose, completely ‎different conditions are required for chitin recovery: 300 g/L of ‎glucose and 35°C for maximal DM (60%) and 80 g/L of glucose ‎and 30°C for a maximum of DP (70%). The use of date’s juice ‎shows that it is possible to extract chitin, in a single step, unlike ‎the simple medium. The richness of the dates juice in mineral ‎elements and the high concentration of reducing sugars (200 ‎g/L) allowed for a maximum activity of proteolytic enzymes ‎favored by a pH maintained constant at around pH 6 for 29h of ‎fermentation, and a significant acidification expressed by a ‎minimum pH of 4.7 which are reflected by rates of 83% and 63% ‎of deproteinization and demineralization, respectively.‎


Demineralization;‎ Deproteinization; ‎ Shrimp shell,‎ Lactobacillus helviticus,‎ Fermentation,‎ Chitin.‎

Recovery Of Nickel And Copper From Metal Finishing Hydroxide Sludge By Kinetic Acid Leaching

Salhi R. .  Boudjouada M. .  Messikh S. .  Gherraf N. . 
pages 62-71.

Determination Of The Drying Speed In Thin Layer Of Shrimp

Andriazafimahazo L.f.g. .  Razafiarison I.a.j. .  Zeghmati B. .  Ramamonjisoa B.o.a. .  Rabary F. .  Rakotomahevitra A. . 
pages 295-309.