Agriculture Reference
In-Depth Information
Chapter 3
A
CHIEVEMENT OF
Z
ERO
E
MISSIONS
BY THE
B
IOCONVERSION OF
F
ISHERY
W
ASTES
INTO
F
ERTILIZER
Joong Kyun Kim
*
, Eun Jung Kim and Kyeong Hwan Kang
Department of Biotechnology and Bioengineering,
Pukyong National University, Busan, Korea
A
BSTRACT
Recently, a paradigm for waste policy has been changed, emphasizing resource
recycling with zero emissions. In this sense, this chapter provides a brief review of
experimental results of the bioconversion of seaweed wastes into fertilizer and discusses
recent issues that are involved in zero emissions during fishery waste treatments.
Seaweeds or their products are commonly used in agriculture to stimulate plant growth
and increase crop productivity. Hence, biodegradation experiments for three different
types of seaweeds were executed to determine their reutilization as wastes, and the
possibility of the biodegraded culture broths of seaweeds as a liquid fertilizer was
examined. The 4-d biodegraded culture broths of all three seaweeds were found to be
phytotoxin-free at 1000 dilution ratio and exhibited comparable fertilizing ability with the
commercial fertilizer in hydroponic culture with an amino acid content of 1.26 to 8.93 g
100 g protein
-1
, low concentrations of heavy metals, and an N/P/K level of 1.62-2.63%.
As a result, the biodegradation was an eco-friendly means to convert seaweed wastes into
liquid fertilizer containing various essential nutrients, such as mono-, di-, and
oligosaccharides, amino acids, and mineral elements. This zero-emissions process for
treating fishery wastes can lead perfect resource recycling.
Keywords
: Zero-emission process, fishery wastes, bioconversion, fertilizer, resource
recycling
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