| dc.description.abstract | In a recent decade, microbial organic fertilizers have come into widespread use
throughout the Asian and Pacific region, replace for the old chemical one because of
its environmental friendly. An agriculture by-product, coffee husk from coffee
production, was used as a raw material to supply the main organic compound in
fermentation process then combine with peat in Dongnai to make high quality
microbial organic fertilizer. Cellulase and pectinase are the most common enzymes
which have a broad application in decomposition of cellulose and pectin in organic
materials. In this study, bioproducts of Aspergillus spp., Biocoffee-1 from Aspergillus
niger and Biocoffee-3 from Aspergillus phoenicis, were used to produce microbial
organic fertilizer by solid state fermentation. Biocoffee-3 presented the best
outcome when there was only 10% bio product used to ferment but the percentage
of decomposed cellulose and pectin up to 62% and 36%; compare with Biocoffee-1,
it degraded 40% of cellulose and 22% of pectin amount when used 15% bio product
to ferment; and only 11%& 5% of cellulose and pectin were decomposed in the
condition of non-bioproduct-adding after one month of fermentation. From the result
of some chemical factors such as nitrogen, potassium, phosphore... and the
standard of microorganisms, we concluded that the final fertilizer reached the range
of a high qualified organic fertilizer which could be used widely in farmland. This
research supports a huge potential for reusing agriculture by-products to make
microbial organic fertilizer for inland demand, especially in high land where the main
income was from coffee production.
Keywords: Aspergillus spp., biocoffee, coffee husk, fertilizer, solid-state fermentation | en_US |
