Organic Waste Recycling

354 Organic waste recycling: technology and management

Figure 7.13 Predicted and observed effluent BOD 5 concentration of the WHP (Polprasert
and Khatiwada 1998)

Figure 7.14 Design chart for BOD 5 removal in water hyacinth ponds (Polprasert et al.
1998)

d=2

d=0.7

d=0.5

d=0.15 d=0.2 d=0.3

d=0.1

d=0

d=1

k.t

dd=1.5=1.5

2 4 6 8 10 12

100

10

1

(^0) k.t
d=2
d=0.7
d=0.5
d=0.3
d=0.15 d=0.2
d=0.1
d=0.005
d=0
d=1
% BOD
removal 5
BOD
(mg/L) 5
Day
Influent
Effluent, observed
Predicted effluent without
biofilm consideration
Predicted effluent with biofilm
consideration