STUDY OF THE EFFECT LEACHATE RECIRCULATION ON BIODEGRADATION RATE IN BIOREACTOR LANDFILL
More than 30% of the entire amount of solid waste generated in Bandung City or 2,200 tons/day is transported to the TPA Sarimukti (Final Processing Site), exceeding the initially anticipated daily capacity of 1,200 tons (Surya, 2020). This goes against Presidential Regulation No. 97/2017, which p...
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| Format: | Theses |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/70868 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | More than 30% of the entire amount of solid waste generated in Bandung City or
2,200 tons/day is transported to the TPA Sarimukti (Final Processing Site),
exceeding the initially anticipated daily capacity of 1,200 tons (Surya, 2020). This
goes against Presidential Regulation No. 97/2017, which places landfill at the
bottom of the hierarchy. The breakdown of solid waste in landfill takes 30 – 50
years and has the potential to generate environmental issues including leachate
contamination, landfill gas emissions, and disease vectors (Sanphoti et.al., 2006).
Bioreactor landfill is reactor with microbiological processes that can speed up the
decomposition of organic waste, accelerate the conversion of complex organic
compounds, increase the efficiency of processes that may not happen in
conventional landfills, and mitigate the potential negative effects of landfills on the
environment and life (Warith, 2001). Bioreactor landfill in this study was run
anaerobically for 138 days. The landfill bioreactor's solid waste generates
leachate, which is used for recirculation. Leachate recirculation to enhance
physical, chemical, and biological conditions, accelerating waste stabilization and
biodegradation. Leachate, gas, and settlement parameters are used to estimate the
rate of biodegradation in the landfill bioreactor. R1, R2, and R3 each had variances
in leachate recirculation of 12%, 6%, and 0% of the reactor volume. Leachate
recirculation of 12% (120 L/day) in R1 is believed to speed up biodegradation, as
evidenced by a higher COD scavenging efficiency of 85.82% as compared to R2
(60L/day) of 77.87%. This is further confirmed by the measured percentage of
settlement (reduction in waste surface) R1, which is 16.61%, in comparison to R2,
which is 9.13%, and R3, which is 4.02%. However, R2 produces more methane gas
(CH4) on average 0.034 L/days than R1 0.027 L/days. This is presumably due to the
presence of an inhibitor in the form of higher O2 due to the leachate recirculation
process in R1. In addition, it is also suspected that gas is difficult to escape into the
atmosphere due to increasingly saturated conditions, which is reflected in vertical
permeability. Leachate recirculation's impact on settlement and biodegradation
rates (COD and methane parameters) will be determined by a MANOVA test with
Minitab. The outcomes showed that leachate recirculation volume had an impact on the rate of biodegradation (methane and COD parameters) and settlement.
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