Environmental Engineering Reference
In-Depth Information
01-Apr-12
20-Apr-12
7
6
5
4
3
2
1
0
C-1
(pH=7.6)
T-1
(pH=5)
T-2
(pH=6)
T-3
(pH=7)
T-4
(pH=8)
T-5
(pH=9)
Control & treatment cultures:
Fig. 1
Initial and fi nal day DO values of Hindon river wastewater at different pH
01-Apr-12
20-Apr-12
60
50
40
30
20
10
0
C-1
(pH=7.6)
T-1
(pH=5)
T-2
(pH=6)
T-3
(pH=7)
T-4
(pH=8)
T-5
(pH=9)
Control & treated cultures:
Fig. 2
Initial and fi nal day BOD values of Hindon river wastewater at different pH
(89.8 %) (Fig. 4 ). The considerable availability of phosphate in Hindon river waste-
water is expectedly high due to its accumulation over many decades.
High sulphate containing wastewaters are generated from various industrial
activities (Lens et al. 1998 ). The concentration of sulphate in Hindon river wastewa-
ter was 27.5 mg/l on initial day of culture study. The present investigation shows
that the maximum reduction in sulphate value was found in T-3 (pH = 7) [73.09 %]
while minimum reduction was found in T-5 (pH = 9) [59.2 %] during the 20 days
course of wastewater culture study (Fig. 5 ).
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