The effect of different concentration of composite coagulant on different arrangement of electrodes for hybrid composite coagulation and lector coagulation treatment of landfill leachate
The development and the population of the country cause the increment of solid waste generation. When the solid waste is increasing, leachate production also increases. The drawback is the potential of leachate to seep into the ground soil that able to contaminate the surrounding area. In this st...
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis |
| Language: | English English English |
| Published: |
2021
|
| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/6447/1/24p%20NUR%20SYAHIRAH%20MOHD%20AMDAN.pdf http://eprints.uthm.edu.my/6447/2/NUR%20SYAHIRAH%20MOHD%20AMDAN%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/6447/3/NUR%20SYAHIRAH%20MOHD%20AMDAN%20WATERMARK.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | The development and the population of the country cause the increment of solid waste
generation. When the solid waste is increasing, leachate production also increases. The
drawback is the potential of leachate to seep into the ground soil that able to
contaminate the surrounding area. In this study, the combined treatment of electrocoagulation
and conventional coagulation was used to treat landfill leachate. The
leachate sample was collected from Simpang Renggam Landfill. The electrodes used
in this experiment were Iron (Fe) and Aluminium (Al) electrodes. The electrode was
dipped into the beaker with a leachate sample (1000mL) and connected to the direct
current power supply. The dimension of the electrode used was 200 mm x 50 mm x 1
mm. The main objective of this study was to determine the optimum ratio of composite
coagulant used with the best electrode arrangement to treat the stabilised leachate
under the influence of pH, current density, dose of coagulant, and duration of current
flow. Three ratios of the composite were used PACTSa, PACTSb, and PACTSc.
PACTSb. was the optimum ratio of composite coagulant with the arrangement of AlAl
electrodes.
The
optimum
conditions
took
place
at
pH
6,
current
density
of
50
A/m
,
0.3 g/L, and at 22 minutes of treatment time. The concentration of PAC and TS in
PACTSb was 80 g/L and 30 g/L, respectively. The obtained removal at these optimum
conditions for turbidity, colour, SS, COD, and ammonia nitrogen was 90%, 97%,
100%, 60%, and 15%, respectively. The sludge of the optimum condition was
evaluated by sludge volume index (SVI), sludge settling rate (SSR), scanning electron
microscopy (SEM) and particle size analyser (PSA). Based on the SVI result, the
sludge settled very slowly and compacted poorly. The value of SVI for each electrode
around 245 mL/g – 373 mL/g. The sludge settling rate shows that Fe ion settle faster
compared to Al ion due to Fe ion is heavier. Through the SEM image, the surface of
sludge from combined treatment was more compact compared to other methods. Besides, based on the sludge size, it showed the sludge was fine, compacted, and
smooth, which indicated a good removal. Therefore, the combined treatment was
effective to treat the stabilised leachate. |
|---|