Background Project In December 2009, MARK traveled to Cochabamba, Bolivia to work on an infrastructure development project in a local community. While abroad, MARK collected data for a project and returned to campus where they completed the design during Spring 2010. MARK’s project consists of a design for treating the wastewater flow from the Colcapirhua Municipal Matadero, a cattle slaughterhouse. Location The Matadero is located in Colcapirhua, about 5 miles west of Cochabamba, Bolivia. The urban sprawl of the municipality has expanded into the neighborhood of the Matadero which was originally located outside of city limits. Methods and Procedures Existing Conditions Existing Site Layout: Most of the land area on the project site is either already occupied or being used. The major structures are illustrated in the image here. It was discovered that an older septic tank was buried south of the Matadero building. Design Options Conclusion Remaining feasible solutions & setbacks • Traditional septic tank for primary treatment Too high BOD 5 & TSS loading; will not fit on property • Facultative pond for secondary treatment Too high flow rate; will not fit on property MARK recommends three alterations: 1. Water conservation practices • The Matadero flow would be reduced by approximately 60% by installing shut off nozzles on hoses and aerators on the faucets 2. Prescreening system • A screen bucket at the trench drain and strainers on the sink drains of remove larger solid particles and reduce the TSS. 3. Reuse of existing system • The Matadero BOD 5 loading would be reduced by approximately 30% Water Sampling and Testing: Sample 1: Large sedimentation chamber Sample 2: Inside slaughterhouse, within pipe network, Sample 3: Inside pump station Sample 4: Rio Rocha, downstream raw sewage discharge While in country, MARK gathered data by: Surveying Public survey Soil Sampling Water Testing Flow Estimating (Mass Balance) Colcapirhua Cochabamba Matadero Adjacent land Soccer Field Matadero Design Parameters: • BOD 5 & TSS • Flow 2-Stage Design Options: 1. Primary treatment 2. Secondary treatment Existing Septic Tank Water Tower Pump Station Matadero building Vacant building Office & guard house Storage building Primary Treatment: (L to R) Traditional septic tank, Imhoff septic tank Secondary Treatment: (L to R) Trickling Filter, Pozo Ciego System, Facultative Pond, Drain Field, Constructed Wetland MARK recommends a 5-stage solution: 1.Water conservation practices 2.Prescreening system 3.Reuse of existing chambers 4.Traditional septic tank as primary treatment 5.Facultative pond as secondary treatment Water Conservation: Prescreening: Traditional Septic Tank (located on Matadero site): Septic tank profile view: Reuse Sedimentation Basin (Chamber 8): Facultative Pond (located on the soccer field): Free Water Surface Sub-Surface Flow Parameter Units Sample 1 Sample 2 Sample 3 Sample 4 Dissolved Solids mg/L 936 9712 808 692 Settleable Solids mL/L 30.0 34.0 2.0 0.7 Suspended Solids mg/L 2570 2269 562 150 Total Solids mg/L 3524 15354 1372 964 Nitrates mg/L NO3 0.5 10.0 0.9 0.3 Nitrites mg/L NO2 0.1 0.4 0.1 0.1 pH -- 6.2 6.6 6.5 7.6 COD mgO2/L 3009 10003 1601 588 BOD 5 (interpolated from COD) mgO2/L 1505 5002 801 294 Water Testing Results: Operation The Matadero is a cattle slaughterhouse funded and operated by the local Colcapirhua municipality. Currently, the waste is piped through a series of chambers on the Matadero property before it is pumped and discharged without treatment into a nearby river. 3 Effluent Options to be researched by others: Return to Pampamayu Canal Future integration into domestic wastewater treatment plant Holding tank Design of Wastewater Treatment Solution for the Colcapirhua Municipal Matadero University of South Florida · 2009 International Capstone Design · Madelyn Rubin and Angela Krause

Design of Wastewater Treatment Solution for the Colcapirhua

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Page 1: Design of Wastewater Treatment Solution for the Colcapirhua

Background

ProjectIn December 2009 MARK traveled to Cochabamba Bolivia to work on an infrastructure development project in a local community While abroad MARK collected data for a project and returned to campus where they completed the design during Spring 2010 MARKrsquos project consists of a design for treating the wastewater flow from the Colcapirhua Municipal Matadero a cattle slaughterhouseLocationThe Matadero is located in Colcapirhua about 5 miles west of Cochabamba Bolivia The urban sprawl of the municipality has expanded into the neighborhood of the Matadero which was originally located outside of city limits

Methods and Procedures

Existing Conditions

Existing Site LayoutMost of the land area on the project site is either already occupied or being used The major structures are illustrated in the image here It was discovered that an older septic tank was buried south of the Matadero building

Design Options Conclusion

Remaining feasible solutions amp setbacksbull Traditional septic tank for primary treatment

Too high BOD5 amp TSS loading will not fit on propertybull Facultative pond for secondary treatment

Too high flow rate will not fit on propertyMARK recommends three alterations1 Water conservation practices

bull The Matadero flow would be reduced by approximately 60 by installing shut off nozzles on hoses and aerators on the faucets

2 Prescreening systembull A screen bucket at the trench drain and strainers on the sink drains of

remove larger solid particles and reduce the TSS3 Reuse of existing system

bull The Matadero BOD5 loading would be reduced by approximately 30

Water Sampling and TestingSample 1 Large sedimentation chamberSample 2 Inside slaughterhouse within pipe network Sample 3 Inside pump stationSample 4 Rio Rocha downstream raw sewage discharge

While in country MARK gathered data bySurveying Public surveySoil Sampling Water TestingFlow Estimating (Mass Balance)

Colcapirhua Cochabamba

Matadero

Adjacent land

Soccer Field

MataderoDesign Parameters

bull BOD5 amp TSS bull Flow

2-Stage Design Options1 Primary treatment2 Secondary treatment

Existing Septic Tank

Water Tower

Pump Station

Matadero building

Vacant building

Office amp guard house

Storage building

Primary Treatment (L to R) Traditional septic tank Imhoff septic tank

Secondary Treatment (L to R) Trickling Filter Pozo Ciego System Facultative Pond Drain Field Constructed Wetland

MARK recommends a 5-stage solution1Water conservation practices2Prescreening system3Reuse of existing chambers 4Traditional septic tank as primary treatment5Facultative pond as secondary treatment

Water Conservation

Prescreening

Traditional Septic Tank (located on Matadero site)

Septic tank profile view

Reuse Sedimentation Basin (Chamber 8)

Facultative Pond (located on the soccer field)Free Water Surface Sub-Surface Flow

Parameter Units Sample 1 Sample 2 Sample 3 Sample 4Dissolved Solids mgL 936 9712 808 692Settleable Solids mLL 300 340 20 07Suspended Solids mgL 2570 2269 562 150Total Solids mgL 3524 15354 1372 964Nitrates mgL NO3 05 100 09 03Nitrites mgL NO2 01 04 01 01pH -- 62 66 65 76COD mgO2L 3009 10003 1601 588BOD5 (interpolated from COD) mgO2L 1505 5002 801 294

Water Testing Results

OperationThe Matadero is a cattle slaughterhouse funded and operated by the local Colcapirhua municipality Currently the waste is piped through a series of chambers on the Matadero property before it is pumped and discharged without treatment into a nearby river

3 Effluent Options to be researched by others Return to Pampamayu Canal Future integration into domestic wastewater treatment plantHolding tank

Design of Wastewater Treatment Solution for the Colcapirhua Municipal Matadero

University of South Florida 2009 International Capstone Design Madelyn Rubin and Angela Krause