Treatment of Leachate Generated from Sewage Sludge Lagoon
The main objective of this research was to study the treatment of leachate generated from sludge lagoons using anaerobic and aerobic processes. Two methods were used to separate the sludge and leachate in sludge lagoons. The first method used a clay layer at the bottom of the lagoon. While, the s...
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| Format: | Thesis |
| Language: | English English |
| Published: |
2002
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/10591/1/FK_2002_12_A.pdf |
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| Summary: | The main objective of this research was to study the treatment of leachate generated
from sludge lagoons using anaerobic and aerobic processes. Two methods were used to
separate the sludge and leachate in sludge lagoons. The first method used a clay layer
at the bottom of the lagoon. While, the second method used a filter media (sand and
gravel) and underdrainage. The leachate was generated from four sets of tank with
different depths (0.375 m and 0.75 m of sludge).
The quality of leachate was measured in tenns of BOD, COD, TSS, VSS, E-coli,
ammonia, nitrate, TKN, phosphorus and heavy metal. The results showed that the
quality of treated leachate from the sand tanks is better than that of clay tanks. The
percentage of BOD, COD, TSS, VSS and E-coli removed for sand tanks ranged from
96-97%, 95-96%, 95-97%, 94-96% and 99-99.5% respectively. While the percentages
of BOD, COD, TSS, VSS and E-coli in the clay tanks ranged from between 91-93%, 90-93%, 86-89%, 86-90% and 90-92% respectively. Results show that filtration using
sand and gravel is more effective in removing organic pollutant in leachate. Treatment
using aeration tanks is effective in removing BOD, COD, TSS, VSS and E-coli. The
percentage of removal of BOD, COD, TSS, VSS and E-coli were 95-96%, 96-97% and
99% respectively using 1 day retention time.
Kinetic studies were carried out using Monod equations In order to find kinetic
constants such as half velocity, Ks, Yield, Y, maximum rate of substrate utilisation, K,
microorganism decay, KI and maximum growth rate, !lm. In addition, a prediction
model is also studied by using Monod equations. |
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