66
N. M. Jais et al.
Clean washing basin and
fill the washing basin
with clean water
Reduce the water level
inside membrane
bioreactor to put the
chain
Use chain block to lifted
the membrane bioreactor
frame inside the
membrane bioreactor
basin
Remove membrane
bioreactor catridge from
frame
Use water jet to remove
sludge and rubbish
inside membrane
bioreactor catridge
Soak the membrane
bioreactor frame in
sodium hypochloride for
2 hours
Left frame suspended on
the washing basin for 5
minutes to toss the
chemical solution after 2
hours of chemical
cleaning
Move back the
membrane bioreactor to
its original location
Repeat the procedure for
all catridge. Let the
plant run for 30 minutes
to 1 hour to test the
membrane bioreactor
condition.
Fig. 4.3 Maintenance process of membrane bioreactor
Table 4.3 The parameter
before and after treatment
Parameter
Inlet sump Final treated
wastewater
a Class IIB
Temperature
(°C)
30.7
30.6
–
BOD 5 at 20 °C
(mg/L)
37.2
2.9
3
COD (mg/L)
88
8.0
25
TSS (mg/L)
41
3
50
Turbidity
(NTU)
42
0.3
50
Dissolved
oxygen (DO)
(mg/L)
1.3
7.5
5–7
E. coli
(MPN/100 mL)
n.d.
n.d.
–
a n.d. is not detected; Interim National Water Quality for
Malaysia—Class IIB: Recreational use with body contact
is main inland sources of drinking water and freshwater fish at Manila. A sewage
treatment system for this fresh market wastewater was constructed and implemented
by the government and Philippine Sanitation Alliance (PSA)’s precursor, to reduce
the amount of pollution flow into the Laguna Lake, to clean up surrounding area and