The Ingenieur Vol 57 January-March 2014 The Ingenieur Vol 57 January-March 2014 | Seite 23

harvesting
  and
  recycling,
  by
  reusing
  the
  same
  rainwater
  repeatedly
  and
  optimally.
  The
  collection

surface
 is
 primarily
 the
 existing
 rooftop
 of
 the
 laboratory
 with
 an
 area
 of
 12,000m2.
 With
 the
 total

storage
 volume
 of
 approximately
 3,700m3,
 about
 10,527m3
 or
 RM17,000
 per
 year
 of
 treated
 water

can
  be
  saved
  (Hamzah,
  2011).
  Water
  quality
  control
  of
  the
  integrated
  rainwater
  harvesting
  and

water
 reuse
 is
 limited
 due
 to
 occasional
 cleaning
 of
 storage
 facilities.

average monthly rate of treated
water conservation is 156m3. In
a year, NAHRIM is able to save
around RM3,000 on water bills.
As for NAHRIM’s Hydraulic
and Instrumentation Laboratory,
due to the huge consumption
of water for physical modelling
activities,
the
system
is
designed according to the
concepts of rainwater harvesting
and recycling, by reusing the
same rainwater repeatedly and
optimally. The collection surface
is primarily the existing rooftop
of the laboratory with an area
of 12,000m2. With the total

storage volume of approximately
Figure

3,700m3, about 10,527m3 or 2:
  Schematic
  diagram
  of
  the
  rainwater
  harvesting
  system
  at
  NAHRIM’s
  Hydraulic
  and

Instrumentation
  aboratory

RM17,000 per year of treated FigureL2: Schematic diagram of the rainwater harvesting system at
water can be saved (Hamzah, NAHRIM’s Hydraulic and Instrumentation Laboratory

2011). Water quality control
of the integrated rainwater
harvesting and water reuse
is limited due to occasional
cleaning of storage facilities.
Masjid Bukit Indah, Ampang
A rainwater harvesting system
has been in use at Masjid Bukit
Indah in Ampang since 2003.
The main objective is to utilise
rainwater as an alternative water
supply for flushing toilets. An
underground rainwater storage
tank of polyethylene modules
was constructed under the
parking area with the total
volume of 60m3. The reliability
of the system is about 80%
and water saving per month
is
100m3.
Water
quality
monitorings indicate that the
quality of rainwater captured is
good and falls within Standard
Class IIB of the National Water
Quality Standard for Malaysia
(NWQS).

Figure 3: Schematic arrangement of the rainwater harvesting system
at Masjid Bukit Indah

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