affected by rainfall, and the amount of leachate is 2–3 times larger in wet season
than in the dry season, which requires a larger sewage reservoir to regulate the
amount of leachate.
(7) Water quality characteristics of leachate
In 2015, because the actual load of the plant exceeded the original design load, the
municipal government approved to expand the treatment capacity of a landfill
leachate treatment plant to 2100 m
3 /d. The sewage collection status of the leachate
treatment plant is shown in Table 5.71.
The landfill leachate is mainly characterized by large fluctuation of water quality,
unbalanced nutrition ratio and low content of heavy metal.
① Large fluctuation of water quality
The quality of leachate changes greatly. Practice has proved that in general, the
quality of leachate varies greatly in different landfill stages. Different stacking
positions of refuse affect the output time of leachate, which will also affect the
leachate quality. To some extent, this affects the irregular change of leachate
quality. There is a certain correlation between leachate quality and water quantity.
The water quality and quantity of landfill leachate over the years are summarized in
Table 5.72 and Fig. 5.33.
Table 5.71 List of Sewage collection status of the leachate treatment plant (m
3
/d)
Project name
Sewage type
Sewage
volume
Remarks
Landfill Phase I
Project
Leachate
The total amount of landfill
leachate is 1393.2 t/d, which is
collected by the special leachate
pipeline, put into the filtrate
collection tank and then the plant
The total amount of sewage is 59.5
t/d, which is collected by the
special sewage pipeline and then
put into the plant.
Landfill Phase II
Project
Leachate
900
Waste
Incineration
Power Plant
Phase I Project
Leachate
250
Domestic sewage
243.2
Boiler drainage,
demineralized water
preparation drainage
19.6
Landfill Gas
Power Plant
Domestic sewage
24.9
Fly Ash
Stabilization
Pretreatment
Plant
Domestic sewage
2
Landfill
Leachate
Treatment Plant
Domestic sewage
3
Total
10
236
5 Application Cases
than in the dry season, which requires a larger sewage reservoir to regulate the
amount of leachate.
(7) Water quality characteristics of leachate
In 2015, because the actual load of the plant exceeded the original design load, the
municipal government approved to expand the treatment capacity of a landfill
leachate treatment plant to 2100 m
3 /d. The sewage collection status of the leachate
treatment plant is shown in Table 5.71.
The landfill leachate is mainly characterized by large fluctuation of water quality,
unbalanced nutrition ratio and low content of heavy metal.
① Large fluctuation of water quality
The quality of leachate changes greatly. Practice has proved that in general, the
quality of leachate varies greatly in different landfill stages. Different stacking
positions of refuse affect the output time of leachate, which will also affect the
leachate quality. To some extent, this affects the irregular change of leachate
quality. There is a certain correlation between leachate quality and water quantity.
The water quality and quantity of landfill leachate over the years are summarized in
Table 5.72 and Fig. 5.33.
Table 5.71 List of Sewage collection status of the leachate treatment plant (m
3
/d)
Project name
Sewage type
Sewage
volume
Remarks
Landfill Phase I
Project
Leachate
The total amount of landfill
leachate is 1393.2 t/d, which is
collected by the special leachate
pipeline, put into the filtrate
collection tank and then the plant
The total amount of sewage is 59.5
t/d, which is collected by the
special sewage pipeline and then
put into the plant.
Landfill Phase II
Project
Leachate
900
Waste
Incineration
Power Plant
Phase I Project
Leachate
250
Domestic sewage
243.2
Boiler drainage,
demineralized water
preparation drainage
19.6
Landfill Gas
Power Plant
Domestic sewage
24.9
Fly Ash
Stabilization
Pretreatment
Plant
Domestic sewage
2
Landfill
Leachate
Treatment Plant
Domestic sewage
3
Total
10
236
5 Application Cases