Environmental Engineering Reference
In-Depth Information
Fig. 8.66
Comparison of computed duckbill valve hydraulic characteristics (
d
p
= 305 mm,
E
= 7.32 MPa,
t
0
= 1.57 cm)
with experimental data: (a) pressure and (b) jet velocity as function of discharge. (
d
p
is pipe diameter,
E
is total energy
head, and
t
0
is rubber thicknesses)
8.5.4
Case Study: Hong Kong Harbor Area Treatment Scheme
The Harbor Area Treatment Scheme (HATS) is a major environmental infrastructure project that collects
sewage from the densely populated urban areas of Kowloon and Hong Kong Island (via a 24 km long deep
tunnel sewerage system) to a centralized sewage treatment works at Stonecutters Island (SCI) (Fig. 8.67).
Stage I of HATS has been in operation since December 2001. The sewage receives Chemically Enhanced
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