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Preface
Table
of Contents
Foundation
Hybrid
Lagoon System
Case
Study
Applications
Proposals
18.
Evaluation of Hybrid Lagoon Performance
(2): Sewage Treatment
Failities.BCJ-1850/2355. 1993-1996.
Hybrid lagoon automatic control facilities have been evaluated by The Building Center of Japan Foundation and received an individual ranking from the Minister of Construction.
Hybrid lagoon automatic control facilities operated as a combined human waste cleaning basin performed according to design, preventing eutrophication by maintaining the discharged water quality at under 5 mg/liter BOD, 3 mg/liter T-N and 2 mg/liter T-P, and demonstrated the technical feasibility of application as a high-performance cleaning basin. The electrical power charge for operating this facility was approximately (JPY) per month.
Table 1 Sewage treatment plant BCJ-2355 1995/8-1996/9 n=12 1m3/0.225kWh
|
Item |
flow-in |
flow-out |
remove |
||||||
|
Unit |
Max |
Mini |
Ave |
STD |
Max |
Mini |
Ave |
STD |
Ave/Ave |
|
BOD 5 mg/l |
830 |
71.0 |
225.5 |
219.3 |
7.9 |
0.5 |
2.7 |
2.1 |
98.8% |
|
COD Mn mg/l |
|
|
|
|
|
|
|
|
|
|
Total-N mg/l |
156 |
13.0 |
44.9 |
36.6 |
4.3 |
1.1 |
2.4 |
2.1 |
94.8% |
|
Total-P mg/l |
44 |
3.1 |
8.4 |
11.3 |
3.2 |
0.9 |
2.2 |
0.8 |
73.8% |
|
SS mg/l |
2800 |
72 |
369 |
768 |
6.4 |
1.8 |
3.4 |
1.8 |
99.1% |
|
Temp ﾁŽ |
25.1 |
9.8 |
18.5 |
|
29.5 |
15.6 |
24.1 |
|
|
|
MLSS mg/l |
|
|
|
|
6100 |
2000 |
4008 |
1226 |
|
Table 2 Sewage treatment plant BCJ-1850 1991/8-1993/6 n=12
|
Item |
flow-in |
flow-out |
remove |
||||||
|
Unit |
Max |
Mini |
Ave |
STD |
Max |
Mini |
Ave |
STD |
Ave/Ave |
|
BOD 5 mg/l |
260.0 |
85.0 |
190.8 |
56.8 |
2.9 |
0.7 |
1.6 |
0.7 |
99.1% |
|
COD Mn mg/l |
96.0 |
49.0 |
77.3 |
15.9 |
9.2 |
5.4 |
7.4 |
1.0 |
90.5% |
|
Total-N mg/l |
50.5 |
25.0 |
37.0 |
7.4 |
3.8 |
1.8 |
2.9 |
0.8 |
92.1% |
|
Total-P mg/l |
8.6 |
4.6 |
5.9 |
1.4 |
2.23 |
0.43 |
1.25 |
0.51 |
78.8% |
|
SS mg/l |
222.0 |
40.0 |
136.6 |
52.8 |
9.9 |
0.1 |
1.5 |
2.7 |
90.8% |
|
Temp ﾁŽ |
31.8 |
6.3 |
18.5 |
|
26.6 |
13.5 |
20.0 |
|
|
|
MLSS mg/l |
|
|
|
|
5160 |
2600 |
3578 |
869 |
|