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Outlining Metabolic Versatility of a Commercial Waste Composting Consortium in Fish Waste Management

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Relation https://eprints.cmfri.org.in/13375/
http://epubs.icar.org.in/ejournal/index.php/FT/article/view/86500
 
Title Outlining Metabolic Versatility of a Commercial Waste
Composting Consortium in Fish Waste Management
 
Creator Sumithra, T G
Reshma, K J
Antony, Alan
Nair, V Anusree
Subramannian, Shinoj
Sayooj, P
Vijayagopal, P
 
Subject Fish Biotechnology
 
Description Effective and sustainable management of fish waste
produced in markets and processing industries, is
a major challenge faced by the coastal communities.
Composting is an environment friendly method for
fish waste disposal, and for the production of
organic fertilizers. However, quality of compost
depends on the use of proficient microbial consortia
to mediate the bioconversion processes. Accordingly,
as a first step in developing a competent fish
waste composting strategy, suitability of a commercial
organic waste composting consortium was
assessed. For this, various selective media were used
for outlining the metabolic activities required for
waste degradation such as production of hydrolytic
enzymes viz., chitinase, lipase and protease (both in
standard media and fish waste component embedded
media), ammonia oxidization, organic and
inorganic phosphate solubilisation, nitrite oxidization
and sulphur oxidization. There were potential
producers for all organic waste degrading enzymes
with highest enzymatic index (EI) as 1.8, 2.9 and 1.5
for protease, lipase and chitinase respectively.
Among these, 10 microbial consortia were able to
degrade fish waste components with the highest EI
as 1, 2.4 and 0.2 for protein, chitin and oil
respectively; indicating that efficacy of fish oil
degraders in the evaluated consortia was very less.
Four isolates were found efficient for denitrification.
Highest organic and inorganic phosphate
solubilisation efficiency was 1.9 and 7 respectively.
Despite the presence of some AOB (ammonia
oxidizing bacteria), NOB (nitrite oxidizing bacteria)
and SOB (sulphur oxidizing bacteria), their efficacy was less. Potential isolates were characterized as Lysinibacillus xylanilyticus, Halotalea sp, Bacillus oryzaecorticis, Cronobacter condiment and Bacillus
megaterium. As fish waste is rich in nitrogen and
sulphur, inclusion of efficient AOB, NOB and SOB
can improve the quality of final compost. Similarly,
exclusion of denitrifiers can avoid the loss of
nitrogen during composting. Consequently, while
there were efficient organic matter degrading
enzyme producers including fish protein and chitin,
absence of efficient AOB, NOB, fish oil degraders
and presence of denitrifiers recommends an improvisation
of the evaluated consortium before application
in fish waste composting.
 
Date 2019
 
Type Article
PeerReviewed
 
Format text
 
Language en
 
Identifier https://eprints.cmfri.org.in/13375/1/Sumithra%20T%20G_2018_Fishery%20Technology.pdf
Sumithra, T G and Reshma, K J and Antony, Alan and Nair, V Anusree and Subramannian, Shinoj and Sayooj, P and Vijayagopal, P (2019) Outlining Metabolic Versatility of a Commercial Waste Composting Consortium in Fish Waste Management. Fishery Technology, 56. pp. 68-73.