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Production and Characterization of Eco Enzyme Produced from Tomato
and Orange and Its Influence on the Aquaculture Sludge
Lim Hwei Fern
Supervisor: Dr. Nazaitulshila Binti Rasit
Bachelor of Technology (Environment)
School of Ocean Engineering
University Malaysia Terengganu
Aquaculture sludge is the wastes produced from fish activities and the amount keeps
increasing due to human population growth. It is known as non-toxic wastes, but its
high nutrient contents will cause various environmental problems. Therefore, eco
enzymes were produced from orange and tomato residues in this research which can
be used as pretreatment to treat aquaculture sludge before other further treatments.
The characteristics of each eco enzyme were investigated and its potential efficacy of
parameters removal was also evaluated. The results showed the enzymes were acidic
and composed of high total solids (TS), total dissolved solids (TDS), biological oxygen
demand (BOD), chemical oxygen demand (COD) and enzyme activities. It’s also
showed the enzymes can removed total suspended solids (TSS), volatile suspended
solids (VSS), total phosphorus (TP), total ammonia nitrogen (TAN) and COD
approximately 71-87%, 49-67%, 94-99%, 68-91% and 47-77% respectively. The
overall removal percentage by orange eco enzyme (OEE) was also higher compared
to tomato eco enzyme (TEE) because of its high organic acid contents. Besides, 10%
concentration of enzyme was showed that it’s more effective in treating aquaculture
sludge. These findings may contribute to the effectiveness of enzymatic pretreatment
which can reduce the inhibitors and improve further anaerobic digestion processes.
37 | U M T U N D E R G R A D U A T E R E S E A R C H D A Y 2019