Shatin Sewage Treatment Works Expansion and Upgrade, Shatin New Town, Hong Kong
Key Data:
Population Equivalent (0.06kg / day)
950,000
Peak Flow
1,020 Mld / day
Stage I and II aeration tank retention time
8 hours
1991 revised aeration tank retention time
11 hours
Stage I and II capacity
205,000 m³ / day
1991 revised capacity
150,000 m³ / day
Final treatment capacity
340,000 m³ / day
Typical wastewater loadings
BOD5
57,000 kg / day
TSS
67,000 kg / day
TKN
15,700 kg / day
Chloride ions
2,000 to 7,000mg / l
Wastewater temperature
15 to 32°C
Final effluent quality
BOD5
20 mg / l (at 95 percentile) 40 mg / l (max)
TSS
30 mg / l (at 95 percentile) 60 mg / l (max)
Total Nitrogen
20 mg / l (annual average) 35 mg / l (max)
NH3-N
5 mg / l (annual average) 10 mg / l (max)
UV project cost
$124 m HKD ($16 m)
Expansion project cost
$2,425 m ($312 m)
Key Players:
Plant Owner
Hong Kong Drainage Services Dept
UV Disinfection Contractor
Jardine Engineering
Other Contractors
Biwater, Leader Civil Engineering, Sun Fook Kong, Hydrotech Professional, Hang Kee Construction & Engineering, ATAL Engineering Ltd and China Railway Engineering Corporation
Timeline:
Stage I commissioned
1982
Stage II commissioned
1986
Stage III expansion began
April 2001
Stage III completion
September 2004
UV project completed
December 2009
Expansion project completion
August 2010
