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Process for the isolation of polyhydroxybutyrate from Bacillus mycoides RLJ B-017

Inactive Publication Date: 2003-02-06
COUNCIL OF SCI & IND RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010] It is therefore an object of the present invention to provide improved techniques for producing polyhydroxy butyrate of the structure 1 using a new bacteria, Bacillus mycoides RLJ B-017, and sucrose and molasses as cheap carbon source.
[0013] It is yet another object of the invention to provide a economical and efficient process for the isolation of bioplastic polyhydroxybutyrate.

Problems solved by technology

Despite PHB's advantages over other materials, its high cost of production has hindered its performance in the market.
In addition, much of the total cost of PHB production is attributable to purifying the PHB produced in the E. coli.

Method used

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  • Process for the isolation of polyhydroxybutyrate from Bacillus mycoides RLJ B-017
  • Process for the isolation of polyhydroxybutyrate from Bacillus mycoides RLJ B-017
  • Process for the isolation of polyhydroxybutyrate from Bacillus mycoides RLJ B-017

Examples

Experimental program
Comparison scheme
Effect test

example 2

[0053] Isolation

[0054] Activated sludge sample, from wastewater treatment plant was appropriately diluted and then spread on YPM-agar plates containing (g 1.sup.-1): yeast extract, 10; bactopeptone, 10; meat extract, 5; NaCl, 5; and agar, 20. The plates were incubated at 30.degree. C. for 72 h. Several colonies appeared on the plates and were screened for their PHB production. Isolate RLJ B-017, thus selected was used in this study.

[0055] Identification of the isolated strain

[0056] Morphological and taxonomic features of the selected isolate were examined by the established method (Sheath et. Al, 1986). The results are as shown Table 1 in Example 1.

[0057] Organism and Maintenance

[0058] Bacillus mycoides RLJ B-017, was grown at 30.+-.0.5.degree. C. and maintained at 4.degree. C. periodical transfer on YPM-agar slants.

[0059] Inoculum Preparation

[0060] The inoculum was grown on nutrient rich medium occupying 20% of the flask volume. The nutrient rich medium consists of (g 1.sup.-1): su...

example-3

[0067] Isolation

[0068] Activated sludge sample, from wastewater-treatment plant was appropriately diluted and then spread on YPM-agar plates containing (g 1-1): yeast extract, 10; bactopeptone, 10; meat extract, 5; and agar, 20. The plates were incubated at 30.degree. C. for 72 h. Several colonies appeared on the plates were screened for their PHB production. Isolate RLJ B-017, thus selected was used in this study.

[0069] Identification of the isolated strain

[0070] Morphological and taxonomic features of the selected isolate was examined by the established method (Sheath et. Al, 1986) The results are as shown Table 1 in example 1.

[0071] Organism and Maintenance

[0072] Bacillus mycoides RLJ B-017, was grown at 30.+-.0.5.degree. C. and maintained at 4.degree. C. by periodical transfer on YPM-agar slants.

[0073] Inoculum Preparation

[0074] The inoculum was grown on nutrient rich medium occupying 20% of the flask volume. The nutrient rich medium consists of (g 1.sup.-1): sucrose, 20; nutrie...

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Abstract

The present invention describes a process for the isolation of polyhydroxybutyrate of the formula 1 by growing a culture of Bacillus mycoides RLJ B-017 in a growth medium and a carbon source selected from sucrose, molasses and pineapple waste.

Description

[0001] The present invention relates to a process for the isolation of polyhydroxybutyrate from Bacillus mycoides RLJ B-017. More particularly, the present invention relates to a process for the recovery of a polyhydroxybutyrate of the formula 1 2[0002] from Bacillus mycoides RLJ B -017 by using sucrose, molasses, pine apple waste, etc. as the carbon source.[0003] Commodity polymers are typically produced from petrochemical sources by well-known synthetic means. However, recent advances in technology have resulted in the promise of new sources of commodity polymers. Particularly promising is the production of plastic resins using living organisms ("bioplastic" or Biopol), including bacteria to produce polymers such as polyhydroxyalkanoate (PHA), a number of bacteria which naturally produce PHA are also promising sources of PHA. (see for example, NOVEL BIODEGRADABLE MICROBIAL POLYMERS, B. A. Dawes, ed, NATO ASI Series, Series E. Applied Sciences--Vol. 196, Kluwer Academic Publishers ...

Claims

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Application Information

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IPC IPC(8): C08G63/06C08G63/89C12P7/62
CPCC08G63/06C08G63/89C12P7/62
Inventor BORDOLOI, MANOBJYOTIBORAH, BORNALITHAKUR, PURBALI S.NIGAM, JAGDISH NARAYAN
Owner COUNCIL OF SCI & IND RES
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