Abstract:
Aim: This study aims to determine whether the application of eco enzyme
affects the industrial waste activated sludge degradation and to compare
the effects of eco enzyme made from oranges and tomatoes.
Methodology and results: The experiments were done on the laboratory
scale for 12 days by applying 10% of eco enzyme in the sludge samples. It
showed both tomatoes and oranges eco enzymes can decrease the pH
from 6.9 to 4.7 compared to control which was stable at 6.9. The reduction
of COD, TSS, and VSS by tomato eco enzyme applications were 61%, 39%
41% respectively compared to by orange eco enzyme application that
showed a higher reduction of 78%, 45%, 46% respectively. The control
samples also show the reduction of COD, TSS, and VSS by 21%, 23%, 30%
respectively. The reduction of organic content in the control samples of
sludge (8.9%) was higher than the samples with eco enzyme (3.5%).
Conclusion, significance, and impact study: The results showed that eco
enzyme application significant statistically affected reduction of pH, COD,
organic content, but not significant statistically on TSS and VSS reductions.
Comparing the application of orange and tomatoes eco enzyme did not
show the significant different treatment.
Description:
Indonesian Journal of Urban and Environmental Technology, Volume 5, Number 2, page 115-133, April 2022
