8/6/2019 MARK Poster Final
1/1
Background
ProjectIn December 2009, MARK traveled to Cochabamba,Bolivia to work on an infrastructure developmentproject in a local community. While abroad, MARKcollected data for a project and returned to campuswhere they completed the design during Spring 2010.MARKs project consists of a design for treating thewastewater flow from the Colcapirhua MunicipalMatadero, a cattle slaughterhouse.
LocationThe Matadero is located in Colcapirhua, about 5 mileswest of Cochabamba, Bolivia. The urban sprawl of themunicipality has expanded into the neighborhood ofthe Matadero which was originally located outside ofcity limits.
Methods and Procedures
Existing Conditions
Existing Site Layout:Most of the land area on the project site is either already occupied or beingused. The major structures are illustrated in the i mage here. It was discoveredthat 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 BOD5 & 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% byinstalling 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 BOD5 loading would be reduced by approximately 30%
Water Sampling and Testing:Sample 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 by:Surveying Public survey
S oi l Sa mp li ng W at er T es ti ngFlow Estimating (Mass Balance)
Colcapirhua Cochabamba
Matadero
Adjacent land
Soccer Field
MataderoDesign Parameters:
BOD5 & TSS Flow
2-Stage Design Options:1. Primary treatment2. 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 practices2.Prescreening system3.Reuse of existing chambers4.Traditional septic tank as primary treatment5.Facultative pond as secondary treatment
Water Conservation:
Prescreening:
Traditional Septic Tank (located onMatadero site):
Septic tank profile view:
Reuse Sedimentation Basin (Chamber 8):
Facultative Pond (located on thesoccer field):Free Water Surface Sub-Surface Flow
Parameter Units Sample1 Sample2 Sample3 Sample4
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
BOD5 (interpolated from COD) m gO2/L 1505 5002 801 294
Water Testing Results:
OperationThe Matadero is a cattleslaughterhouse funded andoperated by the local Colcapirhuamunicipality. Currently, the waste ispiped through a series of chamberson the Matadero property before itis pumped and discharged withouttreatment into a nearby river.
3 Effluent Options to be researched by others:Return to Pampamayu CanalFuture integration into domestic wastewater treatment plantHolding tank
Design of Wastewater Treatment Solutionfor the Colcapirhua Municipal Matadero
University of South Florida 2009 International Capstone Design Madelyn Rubin and Angela Krause
Top Related