Basic Lagoon

Floating Mechanical Aerator Aerated Lagoon

Waste Clean Water ? Wastewater Treatment

o o o - Very simple! Basic Lagoon Waste Clean Water

Waste Clean Water O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 O2O2 - 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!! o o o Basic Lagoon

Waste Clean Water o o o O2O2 O2O2 - Improved aeration - Better oxygen supply - Better biological kinetics - Smaller lagoon Aerated Lagoon

Benson WWTF Lagoon 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, kg 2-10 Kg COD Anaerobic 100 kg COD Sludge, 5 Kg 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. F2F2 F6F6 F3F3 F5F5 A1A1 A2A2 A3A3 A4A4 A5A5 A6A6 F1F1 F4F4 Effluent Influent 442 kg/(ha.d) 442 kg/(ha.d) 144 kg/(ha.d) A:Anaerobic Ponds F: 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. F1F1 F2F2 F6F6 F3F3 F5F5 A1A1 A2A2 A3A3 A4A4 A5A5 A6A6 F4F4 Effluent Influen t 442 kg/(ha.d) 442 kg/(ha.d) 144 kg/(ha.d) A:Anaerobic Ponds F: Facultative ponds Design Modification Alternative 2