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B’ville-Seneca Knolls
Treatment:
Flexible design allows for activated sludge operation
in either single- or two-stage mode. Current mode is
single stage with the second stage used for polishing.
Pure oxygen is generated onsite and used in the first-stage
aeration basins and aerobic digester.
Total phosphorus is removed on a year-round basis,
while disinfection and nitrification are employed
seasonally according to permit.
Plant facts
The plant has two mechanically cleaned bar screens. In 2002 construction began to control odors from the
aerobic digester exhaust which occasionally would emit strong cabbage-like odors due to thermophilic (>40°C)
temperatures. This project was successfully completed in March 2003. The aerobic digester exhaust was redirected to
the aeration basin, which biologically treat this odor source. A biofilter controls odors from the raw influent.
Typical influent
Volume= 3.7 MGD
BOD5 = 121
mg/L
TSS = 252 mg/L
TP = 7.8 mg/L
TKN = 34.0 mg/L
(from 2002 laboratory analyses results). Plant
flow is measured in Sec. Effluent Channel.
Specifications
 |
| Belt press area |
Design values: Volume = 9.0 MGD
BOD5=13,400 lb/day
TSS=13,400 lb/day
TP=750 lb/day
TKN=2,250 lb/day
hoist with clamshell bucket
25,000 gal/chamber (50,000 gal total)
140´ long
40´ wide
8.125´ S.W.D.
340,340 gal/unit (680,680 gal total)
123´ long
41´ wide
8.8´ S.W.D.
331,950 gal/unit (1,659,750 gal total)
155´ long
40´ wide
11.7´ S.W.D.
542,599 gal (2,712,996 gal total)
77´ long
18´ wide
8.8´ S.W.D.
91,232 gal/unit (182,464 gal total)
50´ long
50´ wide
15.4´ S.W.D.
287,980 gal/unit (575,960 gal total)
Principal chemicals used
Ferrous chloride (pH<2) used for TP removal. Sodium
hypochlorite disinfects final effluent.
Cationic polymer is used to condition solids before
dewatering.
Biosolids
Primary and secondary biosolids currently digested
in one of the (pure oxygen) aerobic digesters at
thermophilic temperatures. Digested biosolids are
blended with Wetzel Rd. WWTP anaerobic solids in
post-thickeners. Biosolids are dewatered using belt
presses and are then sent to Metro for further
processing.
Date: 11/7/2002 |
B’ville-Seneca Knolls 