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Brief introduction about Brief introduction about Segovia Segovia Segovia is a city in Segovia is a city in Spain Spain , the , the capital of the province of capital of the province of Segovia Segovia in in Castile-Leon Castile-Leon . It is situated . It is situated about an hour north of about an hour north of Madrid Madrid . . It has over 55000 inhabitants and It has over 55000 inhabitants and an extension of an extension of 163'6 km². 163'6 km². Raul Cabrero Course WWTP 2006/07

Brief introduction about Segovia

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Brief introduction about Segovia. Segovia is a city in Spain , the capital of the province of Segovia in Castile-Leon . It is situated about an hour north of Madrid . It has over 55000 inhabitants and an extension of 163'6 km². Raul Cabrero Course WWTP 2006/07. - PowerPoint PPT Presentation

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Page 1: Brief introduction about Segovia

Brief introduction about SegoviaBrief introduction about Segovia Segovia is a city in Segovia is a city in SpainSpain, the capital , the capital

of the province of of the province of SegoviaSegovia in in Castile-LeonCastile-Leon. It is situated about an . It is situated about an hour north of hour north of MadridMadrid..

It has over 55000 inhabitants and an It has over 55000 inhabitants and an extension of extension of 163'6 km².163'6 km².

Raul CabreroCourse WWTP 2006/07

Page 2: Brief introduction about Segovia

Brief introduction about SegoviaBrief introduction about SegoviaThe old city is The old city is

spectacularly situated spectacularly situated atop a long, narrow atop a long, narrow promontory. It promontory. It contains a wealth of contains a wealth of monuments, including monuments, including the the cathedralcathedral, a , a famous ancient famous ancient Roman aqueductRoman aqueduct, the , the Alcázar, and various Alcázar, and various churches built in the churches built in the Romanesque styleRomanesque style

Page 3: Brief introduction about Segovia

Brief introduction about SegoviaBrief introduction about Segovia

Page 4: Brief introduction about Segovia

WASTE WATER WASTE WATER TREATMENT TREATMENT

PLANTPLANT

IN SEGOVIA IN SEGOVIA (SPAIN)(SPAIN)

Page 5: Brief introduction about Segovia

Pump control roomPump control room

From this room we From this room we control the speed control the speed of the screw pumpsof the screw pumps

Page 6: Brief introduction about Segovia

Variable speed pump motorsVariable speed pump motors

Page 7: Brief introduction about Segovia

Screw pumpsScrew pumps

- The screw pumps lift raw - The screw pumps lift raw sewage approximately 22 sewage approximately 22 feet to a channel above feet to a channel above the pumps. the pumps.

- From there the sewage can - From there the sewage can flow by gravity through the flow by gravity through the comminutor and remainder comminutor and remainder of the wastewater of the wastewater treatment plant. treatment plant.

- The pumps are in operation - The pumps are in operation 24 hours per day, 7 days a 24 hours per day, 7 days a week.week.

Page 8: Brief introduction about Segovia

LaboratoryLaboratory

In the laboratory they In the laboratory they analize samples of waste analize samples of waste water. water.

Page 9: Brief introduction about Segovia

Aerated Grit Tank Aerated Grit Tank

Page 10: Brief introduction about Segovia

The grit tank removes heavy inorganic The grit tank removes heavy inorganic materials such as sand, grit, egg shells, road materials such as sand, grit, egg shells, road pavement and glass from sewage flows.pavement and glass from sewage flows.

The rolling action in the tank is produced by The rolling action in the tank is produced by diffused air introduced at the bottom of the diffused air introduced at the bottom of the tank. tank.

Degritted sewage overflows the tank's Degritted sewage overflows the tank's effluent weir and continues on to the primary effluent weir and continues on to the primary clarifiers' division box. clarifiers' division box.

Page 11: Brief introduction about Segovia

Primary ClarifiersPrimary Clarifiers

The primary clarifiers The primary clarifiers provide the facilities provide the facilities to remove the to remove the settleable and settleable and floatable solids from floatable solids from the wastewater. the wastewater.

Effluent clarifier water Effluent clarifier water passes over the passes over the effluent weirs and is effluent weirs and is directed to the directed to the rotating biological rotating biological contactors.contactors.

Page 12: Brief introduction about Segovia

Scum Collection BoxScum Collection Box

Flotable solids, such Flotable solids, such as grease and scum, as grease and scum, rise to the top of the rise to the top of the tanks. tanks.

The scum and other The scum and other floating materials is floating materials is skimmed from the skimmed from the surface by the sludge surface by the sludge scraping mechanism scraping mechanism and is removed from and is removed from the clarifiers to the the clarifiers to the scum collection box by scum collection box by means of a rotating means of a rotating pipe skimmer. pipe skimmer.

Page 13: Brief introduction about Segovia

Aerobic DigestersAerobic Digesters

The four aerobic digesters The four aerobic digesters stabilize primary and stabilize primary and secondary sludge by secondary sludge by oxidation to the point oxidation to the point where it may be where it may be dewatered and thickened dewatered and thickened then transferred to the then transferred to the dewatering press.dewatering press.

Sludge is mixed with air Sludge is mixed with air and microorganisms and microorganisms

Digested sludge is drawn from the bottom of the tanks Digested sludge is drawn from the bottom of the tanks with the sludge pump in the dewatering room where sludge with the sludge pump in the dewatering room where sludge is concentrated on the belt filter press.is concentrated on the belt filter press.

Page 14: Brief introduction about Segovia

Rotating Biological ContactorsRotating Biological Contactors

Page 15: Brief introduction about Segovia

Settled sewage from the primary Settled sewage from the primary clarifiers flows through an 18-inch clarifiers flows through an 18-inch cast iron pipe to the biosystem cast iron pipe to the biosystem influent box. influent box.

There it is split between 2 rows There it is split between 2 rows

Each row consists of two shafts set Each row consists of two shafts set parallel to the flow. parallel to the flow.

Page 16: Brief introduction about Segovia

Secondary ClarifiersSecondary Clarifiers

The secondary clarifiers The secondary clarifiers provide the necessary provide the necessary detention time and detention time and collection equipment to collection equipment to settle and remove the settle and remove the biological solids (sludge) biological solids (sludge) from the bio-system mixed from the bio-system mixed liquor.liquor.

The clarified water passes The clarified water passes over the effluent weirs and over the effluent weirs and is directed to the final is directed to the final chlorine contact tanks. chlorine contact tanks.

Page 17: Brief introduction about Segovia

Sand filtration bedsSand filtration beds

Slow sand filters are Slow sand filters are used in used in water purificationwater purification for for treating treating raw waterraw water to to produce a potable produce a potable product. product.

They are typically 1 to They are typically 1 to 2 metres deep, can be 2 metres deep, can be rectangular or rectangular or cylindrical in cross cylindrical in cross section and are used section and are used primarily to treat primarily to treat surface water. surface water.

Page 18: Brief introduction about Segovia

Chlorine Contact TanksChlorine Contact Tanks

The chlorination The chlorination system provide system provide chlorine solution for chlorine solution for the disinfection of the disinfection of plant effluent. plant effluent.

There is a flow There is a flow proportioning chlorine proportioning chlorine system for the system for the chlorine to maintain a chlorine to maintain a residual below the residual below the daily average of daily average of 0.55mg/L. 0.55mg/L.

Page 19: Brief introduction about Segovia

Sodium Thiosulfate tanksSodium Thiosulfate tanks

Sodium Thiosulfate Sodium Thiosulfate is used to is used to neutralize the neutralize the chlorine in the chlorine in the effluent following effluent following the disinfection the disinfection process. process.

Page 20: Brief introduction about Segovia

Flow Metering SystemFlow Metering System

The depth varies with The depth varies with the flow rate and as the flow rate and as the float moves a the float moves a proportional signal is proportional signal is sent by the sent by the transmitter to a transmitter to a receiver mounted in receiver mounted in the flow-indicating the flow-indicating panel in the main panel in the main control building. control building.

Page 21: Brief introduction about Segovia

Polymer injection systemPolymer injection system

To mix sludge To mix sludge with polymers with polymers in the belt in the belt press.press.

Page 22: Brief introduction about Segovia

Filter Belt Dewatering PressFilter Belt Dewatering Press Sludge from the aerobic Sludge from the aerobic

digesters is pumped to the digesters is pumped to the dewatering press. dewatering press.

There the sludge is mixed There the sludge is mixed with polymers, spread out with polymers, spread out on a fabric belt, and on a fabric belt, and increasingly compressed increasingly compressed by a series of rollers. by a series of rollers.

A conveyor belt then A conveyor belt then carries the dewatered carries the dewatered sludge to a semi-tralier for sludge to a semi-tralier for ultimate disposal by means ultimate disposal by means of being land applied on of being land applied on farm fields. farm fields.

Page 23: Brief introduction about Segovia

Semi-trailer with sludgeSemi-trailer with sludge

To transport the To transport the sludge to sludge to another placeanother place

Page 24: Brief introduction about Segovia

Output/cooling channelOutput/cooling channel