Basic Lagoon. Floating Mechanical Aerator Aerated Lagoon.

Basic Lagoon

Floating Mechanical Aerator

Aerated Lagoon

WasteCleanWater?

Wastewater Treatment

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- Very simple!

Basic Lagoon

WasteCleanWater

WasteCleanWater

O2 O2 O2 O2 O2 O2 O2

- Very simple!- However, mixing depends on wind!- Therefore, sometimes poorly mixed- Poor mixing means poor aeration- Oxygen supply will then be poor- Lagoon may stink!!

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Basic Lagoon

WasteCleanWatero

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o

O2 O2

- Improved aeration- Better oxygen supply- Better biological kinetics- Smaller lagoon

Aerated Lagoon

Benson WWTFLagoon Before Cleanout

Wastewater Management Division’s Paul Olander (in the pond) and Chuck Kellogg, former Benson Selectman, moving stabilized biosolids to the

manure pump intake

Tanker Truck Land Applying the Biosolids

Benson WWTF Lagoon After the Cleanout

Anaerobic Treatment Vs.Activated Sludge and Pond Technologies in Jordon

Fate of carbon and energy in aerobic (left) and anaerobic (right) wastewater treatment

Aerobic

100kgCOD+Aeration

Sludge, 30-60 kg

2-10 Kg COD

Anaerobic

100 kg COD

Sludge, 5 Kg 10-20 kg COD

Integrated wastewater treatment in Faisalabad

Description of the current system:

Pond system incorporating 4 anaerobic ponds, 6 facultative ponds and 4 sludge storage ponds, with design flow of 90,000 m3/day.

The area of each anaerobic pond is 2.75 ha.

The area primary facultative ponds is 14.9 ha. each and the area of secondory and tertiary ponds is 17.4 ha. each

Integrated wastewater treatment in Faisalabad

Western Domestic Sewage Treatment Ponds (WDSTP), Faisalabad

Integrated wastewater treatment in Faisalabad

Design Modifications

Alternative 1: The flow from

facultative pond 5 is diverted to 3 and pond 6 is reserved for fish farming

Pond 2 and 5 are used for duck weed cultivation.

F2

F6

F3

F5

A1

A2

A3

A4

A5

A6

F1

F4

Effluent

Influent

442 kg/(ha.d)

442kg/(ha.d)

144 kg/(ha.d)

144 kg/(ha.d)

A:Anaerobic PondsF: Facultative ponds

Design Modification Alternative 1

Integrated wastewater treatment in Faisalabad

Alternative 2: Ponds 2 and 5

are used for duckweed production and 3 and 6 for fish farming allowing small amount from 2 and 5 entering 3 and 6.

Remaining water by passed directly to the effluent drain.

F1

F2

F6

F3

F5

A1

A2

A3

A4

A5

A6

F4

Effluent

Influent

442 kg/(ha.d)

442kg/(ha.d)

144 kg/(ha.d)

144 kg/(ha.d)

A:Anaerobic PondsF: Facultative ponds

Design ModificationAlternative 2