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Biodegradation Process and Composition

a biodegradation and composition technology, applied in the field of microbial compositions and microbial processes, can solve the problems of serious environmental problems, large losses for the shrimp processing industry, and unused by-products posing economic burdens for the marine product processing industries

Inactive Publication Date: 2012-12-13
AMERICAN CHEM CORP
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most are used in low end products such as fertilizers, fish silage or pet food but the unused by-products pose an economic burden for the marine product processing industries because of the need to dispose of such residues in an environmentally sound way.
The majority of the inedible by-products are disposed at landfills or dumped back into the ocean, thus causing serious environmental problems and considerable losses to the shrimp processing industry.
However, these methods cause a depolymerization and partial deacetylation of the chitin.
Moreover, these methods complicate the recovery of other products, such as protein and pigment.
However, the industrialization of such fermentation processes has not been successful due the poor performance of commercial inoculants.

Method used

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  • Biodegradation Process and Composition
  • Biodegradation Process and Composition

Examples

Experimental program
Comparison scheme
Effect test

example 1

Fermentation Control by Measurement of pH and Total Titratable Acidity (TTA, %)

[0166]The average initial values of pH and TTA were 7.31±0.10 and 0.53±0.09, respectively. As shown in FIG. 2, the pH was initially reduced to 6.5 by the addition of 2 M citric acid. Then, due to proteolysis and the release of ammonium, the pH increased again to 7.11±0.08 during the first 2 h, and later, the pH diminished by 28% (up to 5.28±0.01) during the 12 hours of fermentation. At approximately 24 hours of fermentation, the final pH was 4.57±0.15. In parallel to the decrease in pH a similar behavior was observed in the mean values of the TTA. During the first 2 hours of the average values of TTA were 1%, and then these values increased gradually to an average value of 3.33±0.23 at 24 hours, as shown in FIG. 2.

example 2

Products of the Fermentation and Chemical Composition

[0167]After the fermentation process, the silage was centrifuged to separate the three principal products (chitin, liquid hydrolysate, and pigment paste). The other product, the fine solids were retained with the raw chitin wash. Table 5 shows the proportion recovered in each fraction. In dry weight, the bigger fraction corresponded to the liquid hydrolysate (55%), then the fine solids (29%), raw chitin (10%) and pigment paste (5%). In the fermented batch, the average value of dry weight was 32% (481.1±5.6 g).

[0168]Table 6 shows the chemical characterization of each of the four main products that were obtained through fermentation. The chitinous product (chitin) shows a partial demineralization reflected as ash. It also reveals high protein content (42.34%) quantified in the liquid hydrolysates. This facilitated the recovery of a pigment paste, consisting mainly of total lipids (42.67%), and produced a fraction abundant in ash (16...

example 3

Amino Acid Profile in the Dry Powder Hydrolysates

[0169]The amino acid content of dried hydrolysate was determined as described by Lopez-Cervantes et al., “Analysis of free amino acids in fermented shrimp waste by high-performance liquid chromatography”, Journal of Chromatography A, volume 1105, 1 (2006). Table 6 shows the total amino acid profile of the dry powder hydrolysates. The proportion of essential amino acids was of 52.5% to dry powder hydrolysates.

TABLE 7Amino acid profile dry powder hydrolysates(mg per g dry weight)Amino acidDry powder hydrolysatesAspartic acid38Glutamic acid39Serine16Histidina*9Glycine28Threonine*14Alanine30Proline8Tyrosine*70Arginine18Valine*20Methionine*4Isoleucine*15Leucine*23Phenylalanine*39Lysine*13Total394* Essential amino207acids

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Abstract

Disclosed are novel microbial compositions and biodegradation processes to treat marine animal or marine animal by-products to produce solid, liquid and lipid fractions that contain useful compounds.

Description

[0001]This application is a U.S. National Stage application under 37 C.F.R. §3.71, claiming priority to PCT application serial no. PCT / EP2010 / 070285 filed Dec. 20, 2010, claiming the benefit of U.S. Provisional Application Ser. Nos. 61 / 289,706, filed Dec. 23, 2009, 61 / 299,869, filed Jan. 29, 2010, and 61 / 355,365, filed Jun. 16, 2010 under 35 U.S.C. §119(e) and are expressly incorporated herein by reference.TECHNICAL FIELD[0002]Disclosed are novel microbial compositions and microbial processes to treat marine animal by-products and in some cases the entire marine animal to produce solid, liquid and lipid fractions that contain useful compounds.BACKGROUND OF THE INVENTION[0003]The processing of fish and marine arthropods, such as shrimp, crab and crayfish, produces large quantities of marine by-products. Most are used in low end products such as fertilizers, fish silage or pet food but the unused by-products pose an economic burden for the marine product processing industries because ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C12P39/00C12N1/20
CPCC11B1/025C12N1/14C12N1/20C12R2001/00C12N1/00
Inventor LOPEZ-CERVANTES, JAIMESANCHEZ-MACHADO, DALIA ISABELROCHIN, KARL REINER FICK
Owner AMERICAN CHEM CORP
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