Post on 01-Feb-2020
transcript
Speaker
Deputy Director: Home-Ming Chen
Circular Economy of
Sewage Treatment Plant
Sewerage Systems Office,
Public Works Department,
Taipei City Government 2018/8/31
Outline
Organization
Sewage Treatment Process
Circular Economy of Sewage Treatment Plant
Vision in the Future
Director
Deputy
Director
Chief
EngineerChief
Secretary
Public
Work
s S
ection
Sewerage Systems Office(SSO),
Public Works Department,
Taipei City Government
3
Design, planning, construction, management and maintenance of Sewer System
Organization
Desig
n P
lannin
g
Section
Opera
tion M
anagem
ent
Section
En
gin
ee
rin
g Q
ua
lity
Assura
nce S
ection
Main
tenance S
ection
Facili
ties M
anagem
ent
Section
Dih
ua
Sew
age T
reatm
ent P
lant
Bali
Sew
age T
reatm
ent P
lant
Neih
u
Sew
age T
reatm
ent P
lant
Syste
ms
Adm
inis
tration S
ection
Adm
inis
tration
Serv
ices O
ffic
e
Accounting O
ffic
e
Pers
onnel O
ffic
e
Govern
ment E
thic
s
Off
ice
Dihua Sewage Treatment Plant
• Largest secondary sewage
treatment plant in Taiwan
• Capacity: 500,000 CMD
• Build underground
• Park on top
• First double-decked clarifiers
in Taiwan
4
Sludge Thickeners
Primary Clarifiers
Fine Bar Screen
Deep Aeration Tanks
Secondary Clarifiers
Disinfection Tanks
Anaerobic Digesters
Belt Filter Dewatering Machines
SludgeDryingSystem
Primary Sludge
Secondary Sludge
Return Sludge
Digestion gas
Incineration
Tamsui River
Sand Filter
Reclaimed Water
Domestic Sewage
Reuse
5
Influent
Effluent
Dihua Sewage Treatment Plant
66
Resource
Disinfection
Sand filter
✔Reclaimed
water
7
Effluent
Liquid - Reclaimed water
8
Liquid - Reclaimed water
Irrigation in Dihua Park
9
• Road cleaning
• Reducing urban heat island effect
Liquid - Reclaimed water
12.3
2.36.2
9.6
57.2
0
10
20
30
40
50
60
70
Tap water Effluent waterfrom the Dihua
Plant
Recycled waterfrom the Dihua
Plant
MF RO
Co
st (N
TD
/m3)
10
Tap
water
Liquid - Cost of different treatments
Effluent Reclaimed
water
MF RO
• Equipment upgrade program & sustainable water usage
• MF：Microfiltration
• RO：Reverse Osmosis
Goal : Reclaimed water → Sustainable water usage
Reuse
in plant
Irrigation
Higher water
quality
Environmental friendly
Sustainable water
resources management
Renew sand filter
system
11
ReducingHeat
Island Effect
Liquid - Reclaimed water
Road cleaning
12
Sewerage Systems Office, Public
Works Department, Taipei City
Government
Solid - Sludge disposal and reuse
Zero waste policy of Taipei City Government
Sludge Reduction
◦ Drying System
Sludge Reuse
◦ Vase and permeable concrete brick
◦ Work with DEP of Taipei City Government
Department of Environmental
Protection, Taipei City Government
Collaboration
13
Sludge Drying System
Feeding
4-6 hrs
Dewatered Sludge 50 tons/day
Dried Sludge11 tons/day
80% moisture content
10%
moisture
content
124~226℃Indirect Heating
Solid - Sludge Drying system
Reduce in Weight : 78%
Materialized(mixing with clay)
• Vases and pen holders as
souvenir for visitors
14
Solid - Dried sludge reuse
Original Painting
Painting their own vases
Pen holders
15
Solid - Collaboration with DEP to LID material
Permeable concrete brick(SSO)
Low Impact Development(SSO)
Material for Sponge City
Bottom ash reuse(DEP)
• Heating value
• Incinerating
• Dried sludge reuse
Bottom ash
Sludge
reduction Digestion gas
SSODEP
● Major components of digestion gas
● Digestion gas heating value
5,000~5,500 kcal/m3
Components CH4 CO2 N2H2O H2S
contents (%) 57~62 33~38 ≦6 ≦20.005~0.0
10
16
Gas - Components of digestion gas
Pure gas(CH4) heating value
10,000 kcal/m3
Mixed sludge Dewatering,
sludge drying
• Agitation
• Heating anaerobic
digester
• Heating Drying
sludge system
Digestion gas CH4：50~60 %
Purification
Sludge after
digestion
(Digestion at 34-36℃)
17
Gas - Utilization
Digestion Gas5846 CMD
AIoT 107年7月19日星期四
氣溫：33℃
雨量：0 mm
設施巡檢APP及維護管理系統
污水下水道即時監看系統
污水處理廠放流水質監測系
統
其他延伸系統
跨平台整合系統
系統消息：
7/19系統維護公告
18
Vision in the Future
Monitor
& Control
AutomationSmart STP
Sewerage Systems Office,
Public Works Department,
Taipei City Government