ISOLATION & IDENTIFICATION OF NOVEL

MICROORGANISMS FOR THE TREATMENT OF RAW

CRUSTACEAN WASTE TO PRODUCE CHITINOUS

MATERIALSCarla Harkin

Dr Wolfram BrückDr Catherine Lynch

Dr Denis McCrudden

CHIBIO: WORK PACKAGE 2 AIMS Development of efficient, economical and

environmentally-friendly pre-treatment of crustacean shell wastes to extract chitinous material (Raw material sources: Europe/Asia/Africa).

Stabilisation of chitinous material for transfer to project partners (UMB, INS, TUM, FhG).

Development of assays for constant quality control.

PRE-TREATMENT OVERVIEW

QC

Raw material Prep

Optimisation of chemical chitin

extraction methods

Optimisation of microbial chitin

extraction methods

Up-scaling

Identification of novel

microorganisms

RAW MATERIAL PREPARATION

CHEMICAL PRE-TREATMENT

7. QC Analysis

MICROBIAL PRE-TREATMENT

Chemical extraction methods- costly and a hazard to the environment.

Biological extraction methods- more cost effective while posing less cause for environmental concern.

Microbial chitin extraction methods: Direct use of enzymes (Brück et al, 2011; Jo et al, 2011). Fermentation (Jung et al, 2005; Jung et al, 2007; Rao et al, 2000).

Fermentation Initial optimisation, adapting methods from literature. Identification of novel microorganisms for fermentation.

Raw material +

Inoculum Shaking Incubator

Change of Inoculum

Shaking IncubatorHarvestin

g & drying

FERMENTATION PROCESS

QC

(Jung et al., 2005; Jung et al., 2007a,b; Oh et al., 2007)

ISOLATION OF NOVEL MICROORGANISMS

Isolation from soil samples

Screening for useful properties

Identification

Characterisation

Small scale fermentation

Large scale fermentation

INITIAL SCREENING

Demineralisation–acid production. Replicated fermentation method on micro scale.

Deproteinisation–protease production. Casein agar plates. Colorimetric protease assay to quantify activity (Vishwanatha et al, 2009).

Fig 1: pH indication after addition of Methyl Red Indicator. L-r: negative yellow, negative orange, positive intense red.

Fig 2: Produciton of zone of proteolysis in casein agar.

SELECTION OF ORGANISMSProperty No. of Organisms

Protease producing 57Acid producing 45Protease & Acid producing

16

TO BE DONE• Identification of isolates; PCR, sequencing- BLAST

• Characterization of isolates: biochemical tests, staining etc.

• Continue to meet chitinous material production targets.

• Continuation of fermentation experiments using raw crustacean waste from Ireland, Indonesia and Tunisia.

FUTURE PROSPECTS• With select cultures, the aim is to scale-up

fermentations to pilot scale to investigate the reality of industrial large scale fermentations in the breakdown of crustacean waste.

• Development of an economic, environmentally friendly, waste reducing facility.

• Profit-generating business opportunities for Irish Seafood Industry.

REFERENCES Brück, W., M., Slater, J. W., Carney, B. F., 2011. Chitin and chitosan from marine

organisms. Chitin, Chitosan, Oligosaccharides and their derivatives. Boca Raton: CRC Press.

Vishwanatha, T., Spoorthi, N., Reena, V., Divyashree B.C., Siddalingeshwara K.G., Karthic, J., Sudipta K.M., 2010. Screening of substrates for protease production from Bacillus lichenformis. International Journal of Engineering Science and Technology (2)11, pp. 6550-6554

Jung, W.J., Jo, G. H., Kuk, J. H., Kim, K. Y., Park, R. D., 2005. Extraction of chitin from red crab shell waste by cofermentation with Lactobacillus paracasei subsp. tolerans KCTC-3074 and Serratia marcescens FS-3. Applied Microbiology and Biotechnology (71) pp. 234-237.

Jung, W.J., Jo, G. H., Kuk, J. H., Kim, Y. J., Oh, K. T., Park, R. D., 2007. Production of chitin from red crab shell waste by successive fermentation with Lactobacillus paracasei KCTC-3074 and Serratia marcescens FS-3. Carbohydrate Polymers (68) pp. 746-750.

Oh, K. T., Kim, Y. J., Nguyen, V. N., Jung, W.J., Park, R.D. 2007. Demineralization of crab shell waste by Pseudomonas aeruginosa F722. Process Biochemistry. (42) pp. 1069–1074.

Jo, G.H., Park, R.D., Jung, W.J., 2011. Enzymatic production of chitin from crustacean shell waste. Chitin, Chitosan, Oligosaccharides and their derivatives. Boca Raton: CRC Press.

Rao, M. S., Muñoz, J., Stevens, W. F., 2000. Critical factors in chitin production by fermentation of shrimp biowaste. Applied Microbiology and Biotechnology (54) pp. 808-813.

Thank you very much for your attention.