Tour Metro B’ville-Seneca Knolls Meadowbrook-Limestone Brewerton Wetzel Road Oak Orchard

Biosolids and residuals Fact sheet on biosolids Production and marketing N-Viro™ Soil specifications and use Quality control Environmental management system Meeting standards

Area served: Baldwinsville, Radisson, Seneca Knolls, Interstate Island industrial area, and River Mall.

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

Grit chambers (2)

hoist with clamshell bucket
25,000 gal/chamber (50,000 gal total)

Primary settling tanks (2)

140´ long 40´ wide 8.125´ S.W.D.
340,340 gal/unit (680,680 gal total)

Aeration tanks (5)

123´ long 41´ wide 8.8´ S.W.D.
331,950 gal/unit (1,659,750 gal total)

Final settling tanks (5)

155´ long 40´ wide 11.7´ S.W.D.
542,599 gal (2,712,996 gal total)

Chlorine contact tanks (2)

77´ long 18´ wide 8.8´ S.W.D.
91,232 gal/unit (182,464 gal total)

Digesters (2)

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 in the N-Viro™ process.
Date: 11/7/2002