CÓDIGO VERSIÓN REVISIÓN PÁGINA
MEJORAMIENTO Y AMPLIACIÓN DE LOS SERVICIOS DE SANEAMIENTO BÁSICO DE LA CIUDAD CAPITAL DE POMABAMBA - POMABAMBA – ANCASH PLANTAS DE TRATAMIENTO DE AGUA RESIDUAL PARA LA LOCALIDAD DE POMABAMBA
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CÓDIGO VERSIÓN REVISIÓN PÁGINA
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1.
GENERALIDADES .................................................................................................................... 5
2.
PARÁMETROS DE DISEÑO ...................................................................................................... 5
3.
UBICACIÓN ............................................................................................................................. ............................................................................................................................ 6
4.
CALIDAD DEL AGUA A TRATAR ............................................................................................... .............................................................................................. 6
5.
CUERPO RECEPTOR ................................................................................................................ ............................................................................................................... 9
5.1. CAUDAL .................................................................................................................................. ................................................................................................................................. 9 5.2. CALIDAD ............................................................................................................................... .............................................................................................................................. 10 5.3. UBICACIÓN DEL PUNTO DE VERTIMIENTO .................................................................... .......................................................................... ...... 10 6.
CALIDAD DEL AGUA RESIDUAL TRATADA ............................................................................. ............................................................................ 10
7.
BALANCE DE MASAS .................................................................. ............................................................................................................ .......................................... 13
7.1. IMPACTO DE LA DESCARGA EN EL CUERPO RECEPTOR. ...................................................... 14 8.
DESCRIPCIÓN DE LA PLANTA ................................................................................................ ............................................................................................... 14
8.1. PLANTA DE TRATAMIENTO 01 (PTAR-01) ...................................................................... ............................................................................ ...... 14 8.1.1. CÁMARA DE REJAS ............................................................................. ............................................................................................................ ............................... 15 8.1.2. REACTOR CON BAFLES ...................................................................................................... ...................................................................................................... 15 8.1.3. BIOFILTROS................................................................... BIOFILTROS........................................................................................................................ ..................................................... 15 8.1.4. SISTEMA DE DESINFECCIÓN ............................................................... .............................................................................................. ............................... 16 8.1.5. LECHO DE SECADO DE LODOS ............................................................ ........................................................................................... ............................... 16 8.1.6. EFICIENCIA DE LA PTAR ...................................................................... ..................................................................................................... ............................... 16
8.2. PLANTA DE TRATAMIENTO 02 (PTAR-02) ...................................................................... ............................................................................ ...... 17 8.2.1. CÁMARA DE REJAS ............................................................................. ............................................................................................................ ............................... 17 8.2.2. REACTOR CON BAFLES ...................................................................................................... ...................................................................................................... 17 8.2.3. BIOFILTROS................................................................... BIOFILTROS........................................................................................................................ ..................................................... 18
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8.2.6. EFICIENCIA DE LA PTAR ...................................................................... ..................................................................................................... ............................... 19
8.3. PLANTA DE TRATAMIENTO 03 (PTAR-03) ...................................................................... ............................................................................ ...... 19 8.3.1. CÁMARA DE REJAS ............................................................................. ............................................................................................................ ............................... 20 8.3.2. REACTOR CON BAFLES ...................................................................................................... ...................................................................................................... 20 8.3.3. BIOFILTROS................................................................... BIOFILTROS........................................................................................................................ ..................................................... 20 8.3.4. SISTEMA DE DESINFECCIÓN ............................................................... .............................................................................................. ............................... 21 8.3.5. LECHO DE SECADO DE LODOS ............................................................ ........................................................................................... ............................... 21 8.3.6. EFICIENCIA DE LA PTAR ...................................................................... ..................................................................................................... ............................... 21
8.4. PLANTA DE TRATAMIENTO 04 (PTAR-04) ...................................................................... ............................................................................ ...... 22 8.4.1. CÁMARA DE REJAS ............................................................................. ............................................................................................................ ............................... 22 8.4.2. REACTOR CON BAFLES ...................................................................................................... ...................................................................................................... 22 8.4.3. BIOFILTROS................................................................... BIOFILTROS........................................................................................................................ ..................................................... 23 8.4.4. SISTEMA DE DESINFECCIÓN ............................................................... .............................................................................................. ............................... 23 8.4.5. LECHO DE SECADO DE LODOS ............................................................ ........................................................................................... ............................... 24 8.4.6. EFICIENCIA DE LA PTAR ...................................................................... ..................................................................................................... ............................... 24
9.
MEMORIAS DE CÁLCULO DE LA PTAR - 01 ........................................................................... 26
9.1. CÁMARA DE REJAS ......................................................................................................... .............................................................................................................. ...... 26 9.2. REACTOR COM BAFLES ............................................................. ........................................................................................................ ........................................... 26 9.3. BIOFILTRO ............................................................................................................................ ........................................................................................................................... 28 9.4. CÁMARA DE CONTACTO DE CLORO ..................................................................................... 29 9.5. LECHO DE SECADO ............................................................................................................... .............................................................................................................. 30 10. MEMORIAS DE CÁLCULO DE LA PTAR - 02 ........................................................................... 31 10.1.
CÁMARA DE REJAS ....................................................................................................... ...................................................................................................... 31
10.2.
REACTOR COM BAFLES ................................................................................................ 32
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CÓDIGO VERSIÓN REVISIÓN PÁGINA
10.5.
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LECHO DE SECADO DE LODOS ..................................................................................... 36
11. MEMORIAS DE CÁLCULO DE LA PTAR - 03 ........................................................................... 37 11.1.
CÁMARA DE REJAS ....................................................................................................... ...................................................................................................... 37
11.2.
REACTOR CON BAFLES ................................................................................................. ................................................................................................ 38
11.3.
BIOFILTRO .................................................................................................................... ................................................................................................................... 40
11.4.
CÁMARA DE CONTACTO DE CLORO ............................................................................. ............................................................................ 42
11.5.
LECHO DE SECADO ....................................................................................................... ...................................................................................................... 43
12. MEMORIAS DE CÁLCULO DE LA PTAR - 04 ........................................................................... 44 12.1.
CÁMARA DE REJAS ....................................................................................................... ...................................................................................................... 44
12.2.
REACTOR COM BAFLES ................................................................................................ 45
12.3.
BIOFILTRO .................................................................................................................... ................................................................................................................... 47
12.4.
CÁMARA DE CONTACTO DE CLORO ............................................................................. ............................................................................ 48
12.5.
LECHO DE SECADO ....................................................................................................... ...................................................................................................... 49
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CÓDIGO VERSIÓN REVISIÓN PÁGINA
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La ciudad de Pomabamba cuenta actualmente con un Sistema de Tratamiento de agua residual, con en malas condiciones estructurales e hidráulicas, con serios problemas de operación y mantenimiento. El presente proyecto contempla el tratamiento del agua residual para las cinco (05) áreas de drenaje identificadas, según la topografía del terreno, se proyectan en total cuatro (04) sistemas de tratamiento, según los componentes indicados a continuación: -
Planta de tratamiento 01 (PTAR-01): Cámara de Rejas (01), Reactor con Bafles (02), Biofiltros (03), Cámara de contacto de Cloro (01), cámara de bombeo de desagüe (01).
-
Planta de tratamiento 02 (PTAR-02): Cámara de Rejas (01), Reactor con Bafles (02), Biofiltros (03), Cámara de contacto de Cloro (01).
-
Planta de tratamiento 03 (PTAR-03): Cámara de Rejas (01), Reactor con Bafles (03), Biofiltros (04), Cámara de contacto de Cloro (01).
-
Planta de tratamiento 04 (PTAR-04): Cámara de Rejas (02), Reactor con Bafles (03), Biofiltros (04), Cámara de contacto de Cloro (01).
Los lodos producidos en los reactores con bafles serán acondicionados en lechos de secado de lodos. Los efluentes de los sistemas de tratamiento de la ciudad de Pomabamba serán descargados al rio Pomabamba.
Las plantas de tratamiento han sido concebidas, para tratar las aguas residuales durante un periodo de 20 años, que recibirá al final los desagües de un total de 6,481 habitantes. Cuadro 1. Parámetros de diseño para el sistema de tratamiento
Población actual (2017) Tasa de crecimiento Población futura (20 años) Servida Dotación Contribución al desagüe
Hab
1.078
793
1.524
1.509
1,53%
1,53%
1,53%
1,53%
Hab
1,463
1,427
2,265
2,235
L/hab/d
180,00
180,00
180,00
180,00
%
80.00
80.00
80.00
80.00
4.904,73
7,390
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Las plantas de tratamiento de agua residual se proyectan en las siguientes ubicaciones: Cuadro 2. Ubicación de las plantas de tratamiento del agua residual (PTAR)
PTAR-01 PTAR-02 PTAR-03 PTAR-04
9024607.155 228963.038 229217.917 229427.427
228687.361 9024303.775 9023957.983 9023660.043
2936.00 2921.00 2912.00 2910.00
Fuente: Elaboración Elaboración propia propia
La localidad de Pomabamba cuenta actualmente con sistema de alcantarillado existente, con tres vertimientos principales, de los cuales dos (02) de ellos son los más representativos; descarga en la PTAR Existente 01 y descarga en la PTAR Existente 03. Con el fin de obtener muestras representativas de las aguas residuales de la ciudad de Pomabamba, se ha realizado una campaña de cinco días en cada uno de los dos (02) puntos de monitoreo, tomando por cada día una muestra compuesta, que se envía al laboratorio para su correspondiente análisis.
Cuadro 3. Fechas de la toma de muestras
MUESTRA COMPUESTA 01 MUESTRA COMPUESTA 02 MUESTRA COMPUESTA 03 MUESTRA COMPUESTA 04 MUESTRA COMPUESTA 05
15/09/2017 17/09/2017 19/09/2017 20/09/2017 21/09/2017
15/09/2017 17/09/2017 19/09/2017 20/09/2017 21/09/2017
Fuente: Elaboración Elaboración propia propia
Las muestras compuestas fueron tomadas en tres (03) horarios distintos por cada día; en la mañana, a medio día y por la noche, aforando respectivamente para determinar el volumen necesario, generando por cada día las dos muestras compuestas enviadas al laboratorio
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CÓDIGO VERSIÓN REVISIÓN
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PÁGINA
monitoreo – PTAR PTAR Existente 01 Cuadro 4. Resultados de monitoreo –
Bacterias Coliformes Totales. Bacterias Coliformes Termotolerantes o Fecales.
UFC/100 mL a 35ºC
3,50E+07
3,50E+06
7,90E+05
3,50E+06
4,60E+06
9,48E+06
UFC/100 mL a 44,5ºC
1,70E+06
2,20E+05
1,40E+05
2,20E+05
4,60E+06
1,38E+06
Parásitos
Organismo/L
64
0
0
0
0
13
pH
Valor de pH
6,58
6,67
6,74
6,5
6,66
6,63
Sólidos totales disueltos
mgL-1
236
292
280
228
284
264
Sólidos sedimentables
mgL-1
<1.0
1,5
1,5 1,5
1,5 1,5
1,5
1,5
Sólidos Totales en Suspensión
mgL-1
68
88
108
81
80
85
Sólidos Volátiles
mgL-1
6
8
12
5
6
7
Demanda Bioquímica de Oxigeno
mg/L
157,8
458
123
56
130,3
185,0
Demanda Química de Oxigeno
mg/L
202,4
860,4
135,2
141,8
209,9
309,9
Aceites y Grasas
mg/L
10,2
14,5
18,9
10,3
18
14,4
Nitrógeno Orgánico
mg/L
27,49
35,96
27,32
21,21
29,71
28,34
Nitrógeno Amoniacal
mg/L
8
8,03
13,6
7,24
13,6
10,1
ºC
13,2
14,4
13
14,2
15,1
14,0
Temperatura
Fuente: Elaboración Elaboración propia propia – Resultados Resultados de Laboratorio
monitoreo – PTAR PTAR Existente 03 Cuadro 5. Resultados de monitoreo –
Bacterias Coliformes Totales. Bacterias Coliformes Termotolerantes o Fecales.
UFC/100 mL a 35ºC
1,60E+07
5,40E+05
2,40E+06
1,30E+06
2,20E+06
4,49E+06
UFC/100 mL a 44,5ºC
2,80E+05
1,10E+05
7,90E+05
7,90E+05
4,60E+05
4,86E+05
Parásitos
Organismo/L
98
0
0
0
0
20
pH
Valor de pH
6,5
6,82
6,89
6,5
6,78
6,70
Sólidos totales disueltos
mgL-1
436
156
204
304
213
262,6
Sólidos sedimentables
mgL-1
<1.0
5
1,5
1,5
1,5
1,5
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CÓDIGO VERSIÓN REVISIÓN PÁGINA
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De acuerdo a la Norma OS 090, considerando las contribuciones per cápita recomendadas para una población futura, servida al año 20, sin sistema de alcantarillado existente, se obtienen valores indicados en el siguiente cuadro: Cuadro 6. Calidad del agua residual cruda en base a aportes percapita-OS.090
DBO5 Solidos suspendidos totales NH3-N como N Kjeldhal total como N Fosforo total Coliformes fecales Salmonella Sp Neomatodos intes.
mg/L mg/L mg/L mg/L mg/L NMP/100mL NMP/100mL N Huevos/L
162,66 292,79 26,03 39,04 9,76 6,51E+11 3,25E+08 1,30E+06
Fuente: Elaboración Elaboración propia propia
Del comparativo entre los cuadros 4, 5 y 6, algunos valores más importantes como la DBO y los SST, se encuentran muy bajos, en concordancia a valores típicos presentados en el siguiente cuadro: Cuadro 7. Composición típica de agua residual cruda
Demanda bioquímica de oxigeno
mg/L
133
200
400
Sólidos suspendidos
mg/L
130
195
389
NMP/100mL
103-105
104-106
105-108
Coliformes fecales
Fuente: Wastewater Wastewater Engineering Engineering (Metcalf (Metcalf & Eddy, 2014)
Del análisis de la data mostrada en los cuadros 4, 5, 6 y 7, se determina la siguiente calidad
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CÓDIGO VERSIÓN REVISIÓN PÁGINA
Sólidos sedimentables
mgL-1
1,5
Sólidos Totales en Suspensión
mgL-1
130
Sólidos Volátiles
mgL-1
7
Demanda Bioquímica de Oxigeno
mg/L
185,0
Demanda Química de Oxigeno
mg/L
309,9
Aceites y Grasas
mg/L
14,4
Nitrógeno Orgánico
mg/L
28,34
Nitrógeno Amoniacal
mg/L
10,1
ºC
14,0
Temperatura Fuente: Elaboración Elaboración propia propia
residuales – PTAR PTAR Existente 03 Cuadro 9. Calidad de aguas residuales –
Bacterias Coliformes Totales. Bacterias Coliformes Termotolerantes o Fecales.
UFC/100 mL a 35ºC
4,49E+06
UFC/100 mL a 44,5ºC 4,86E+05
Parásitos
Organismo/L
20
pH
Valor de pH
6,70
Sólidos totales disueltos
mgL-1
262,6
Sólidos sedimentables
mgL-1
1,5
Sólidos Totales en Suspensión
mgL-1
130
Sólidos Volátiles
mgL-1
58
Demanda Bioquímica de Oxigeno
mg/L
185.0
Demanda Química de Oxigeno
mg/L
309.9
Aceites y Grasas
mg/L
17,1
Nitrógeno Orgánico
mg/L
24,62
Nitrógeno Amoniacal
mg/L
10,41
ºC
13,8
Temperatura Fuente: Elaboración Elaboración propia propia
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CÓDIGO VERSIÓN REVISIÓN PÁGINA
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La calidad del agua del cuerpo receptor fue comprobada mediante análisis de laboratorio. Los parámetros monitoreados se presentan en la siguiente tabla. Cuadro 10. Calidad del cuerpo receptor - Rio Pomabamba
Bacterias Coliformes Totales. UFC/100 mL a 35ºC Bacterias Coliformes Termotolerantes o Fecales. UFC/100 mL a 44,5ºC pH Valor de pH Demanda Bioquímica de Oxigeno mg/L Demanda Química de Oxigeno mg/L Aceites y Grasas mg/L Oxígeno Disuelto mg/L Temperatura ºC
5400 1400 6,93 2,3 9 <0.5 7 14,6
Fuente: Elaboración Elaboración propia – Resultados Resultados de Laboratorio
La ubicación del punto de vertimiento para la PTAR Ciudad Satélite Cuadro 11. Ubicación de los puntos de vertimiento de las PTAR
DESCARGA - PTAR-01 DESCARGA - PTAR-02 DESCARGA - PTAR-03 DESCARGA - PTAR-04 Fuente: Elaboración Elaboración propia propia
228657147 228944.789 229188.122 229459.033
9024587286 9024275.277 9023891.759 9023639.244
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CÓDIGO VERSIÓN REVISIÓN PÁGINA
11 de 50
Cuadro 12. Límites Máximos permisibles para los efluentes de PTAR
Demanda bioquímica de oxigeno Sólidos suspendidos Coliformes fecales Demanda Química de Oxigeno pH Temperatura
mg/L mg/L NMP/100 ml mg/L ˚C
100 150 10 200 6.5-8.5 <35
Fuente: DS 003-2010-MINAM 003-2010-MINAM
Referente al DS 002-2008-MINAM, considerando que el rio Pomabamba, aguas abajo llega al Río Mantaro y que mediante el RJ 202-2010-ANA ha sido clasificado en Categoría 3, se establece que la mezcla del efluente con el rio deben cumplir con los límites establecidos para la categoría 3. Según la ubicación de las cuatro (04) plantas de tratamiento, se establece que; para las plantas proyectadas PTAR 01 y PTAR 02, se considera el diseño con los resultados de calidad de la PTAR existente 01 y para las plantas proyectadas PTAR 03 y PTAR 04, se considera el diseño con los resultados de calidad de la PTAR existente 03. De acuerdo al tratamiento propuesto para cada una de las PTAR proyectadas, se espera que las aguas residuales tratadas presenten la calidad indicada en el siguiente cuadro. Cuadro 13. Calidad del agua residual tratada PTAR 01
Caudal de diseño Aceites y grasas Coliformes Termotolerantes DBO 5
m3/día mg/L NMP/100mL mg/L
390 14 1,38E+02 47
20 1,00E+04 100
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CÓDIGO VERSIÓN REVISIÓN PÁGINA
Coliformes Termotolerantes
NMP/100mL
1,38E+02
1,00E+04
DBO 5
mg/L
47.11
100
DQO
mg/L
87.94
200
-
6,63
6,5 - 8,5
mg/L
13
150
°C
20
< 35
pH Sólidos totales en suspensión Temperatura Fuente: Elaboración Elaboración propia
Cuadro 15. Calidad del agua residual tratada PTAR 03
Caudal de diseño
m3/día
621
Aceites y grasas
mg/L
17
20
NMP/100mL
4,86E+01
1,00E+04
DBO 5
mg/L
47
100
DQO
mg/L
88
200
-
6,70
6,5 - 8,5
mg/L
13
150
°C
20
< 35
Coliformes Termotolerantes
pH Sólidos totales en suspensión Temperatura Fuente: Elaboración Elaboración propia
12 de 50
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CÓDIGO VERSIÓN REVISIÓN PÁGINA
13 de 50
El balance de masas se realiza para comprobar que el vertimiento del agua residual tratada no afecte negativamente la calidad del cuerpo receptor, debiendo la mezcla agua residual tratada – agua del rio, no superar los límites máximos permisibles de calidad establecidos en los ECAs. El balance se realiza utilizando el caudal mínimo del cuerpo receptor.
01 – Evaluación Evaluación ambiental del efecto del vertimiento Cuadro 17. PTAR 01 –
Caudal de diseño Coliformes Termotolerantes DBO 5 Oxígeno Disuelto pH Temperatura
L/s NMP/100mL mg/L mg/L °C
4.52
8640,00
1,38E+02
1,40E+03
2,20E+02
1,00E+04
47,11 6,22 6,63 20
2,30 7,00 6,93 14,6
0,76 6,09 6,78 17
100 >5 6,5 - 8,5 -
Fuente: Elaboración Elaboración propia
02 – Evaluación Evaluación ambiental del efecto del vertimiento Cuadro 18. PTAR 02 –
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CÓDIGO VERSIÓN REVISIÓN
14 de 50
PÁGINA
Oxígeno Disuelto
mg/L
6,22
7,00
6,09
>5
pH
-
6,70
6,93
6,81
6,5 - 8,5
Temperatura
°C
20
14,6
17
-
Fuente: Elaboración Elaboración propia
04 – Evaluación Evaluación ambiental del efecto del vertimiento Cuadro 20. PTAR 04 –
Caudal de diseño Coliformes Termotolerantes DBO 5
L/s NMP/100mL mg/L
Oxígeno Disuelto
6,98
8.640,00
4,86E+01
1,40E+03
2,20E+02
1,00E+04
47,11
2,30
0,78
100
mg/L
6,22
7,00
6,09
>5
pH
-
6,70
6,93
6,81
6,5 - 8,5
Temperatura
°C
20
14,6
17
-
Fuente: Elaboración Elaboración propia
De los cuadros anteriores se puede apreciar que el balance de masas presentado indica que la descarga del efluente tratado no genera impacto negativo en la calidad del agua del
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CÓDIGO VERSIÓN REVISIÓN PÁGINA
15 de 50
Comprende el tratamiento preliminar, donde serán retirados los sólidos de tamaño mayor a 2cm que vienen en el agua residual cruda. La unidad está conformada por una estructura rectangular de concreto de dimensiones interiores de 0.5x2.35x0.8m, la cual albergara rejas de 1cm de espesor instaladas a una separación de 2 cm con un ángulo de inclinación de 45˚. La cámara de rejas contara con un canal de bypass, que funcionara en caso que las
rejas de obstruyan o durante trabajos de mantenimiento.
Esta unidad brindara el tratamiento primario, removiendo principalmente sólidos suspendidos, demanda bioquímica de oxigeno (DBO), demanda química de oxigeno (DQO). El principio del Reactor con bafles es lograr la remoción de contaminantes a través del contacto del agua residual con el lodo sedimentado en la unidad. Para lo cual se cuenta con más de 2 cámaras y el flujo es manera ascendente para lograr el contacto deseado del agua residual con el lodo, el lodo que pasa a la siguiente unidad es depositado en el fondo de la misma y sirve para el tratamiento. La PTAR 01 contará con 02 Reactores con bafles, de cinco (05) cámaras en cada unidad, los cuales trabajaran en paralelo. La dimensión exterior de la unidad de 7.95x5.70x3.35m. Las
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CÓDIGO VERSIÓN REVISIÓN PÁGINA
16 de 50
Los Biofiltros tienen dimensiones interiores de 2.50x3.30x1.80m. El lecho filtrante tiene una altura de 1.8 m y está conformado por grava, los 0.5m iniciales de diámetro de 7.510cm y la altura restante de diámetro de 4.0-7.5cm. El dren presenta una altura de 0.4m. Para asegurar la distribución uniforme en todo el medio filtrante sobre este se tiene una altura de agua promedio de 0.45m. El ingreso a las unidades se realiza mediante tuberías de HDPE con diámetro de 90mm. La eficiencia que presenta esta unidad es la siguiente: -
DBO: 48.5%
-
DQO: 45.8%
-
Sólidos suspendidos: 80%
-
Coliformes fecales: 01 log
El efluente del Biofiltros será desinfectado con hipoclorito de calcio a fin de reducir la carga bacteriana, utilizando para tal fin un dosificador con orificio y carga constante. El dosificador estará conformado por un recipiente de plástico con un volumen de 200 L. Para asegurar un adecuado tiempo de contacto de cloro, se contará con una cámara de contacto de cloro, con dos compartimientos de 0.8 m de ancho, largo total (eje) de 6,28 m
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CÓDIGO VERSIÓN REVISIÓN PÁGINA
17 de 50
Cuadro 21. Eficiencia total de la PTAR 01
DBO 5
mg/L
185,0
75%
47,11
DQO
mg/L
309,9
72%
87,94
Solidos totales en suspensión
mg/L
130,0
90%
13,00
Coliformes Termotolerantes
NMP/100mL
1,38E+06
100%
1,38E+02
Fuente: Elaboración Elaboración propia
La planta se ha proyectado para tratar un caudal promedio de 2.48 L/s, considerándose un
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CÓDIGO VERSIÓN REVISIÓN PÁGINA
18 de 50
La PTAR contará con 02 Reactores con bafles, de cinco (05) cámaras en cada unidad, los cuales trabajaran en paralelo. La dimensión exterior de la unidad de 7.95x5.70x3.35m. Las dimensiones útiles de cada cámara son de 0.90x5.50x2.50m. El agua residual ingresa por la parte superior a las cámaras a través de 14 tuberías de HDPE de diámetro de 90mm. Existen pantallas transversales que sirven para conducir el agua hacia el fondo de la cámara, una vez en el fondo el agua asciende para salir de la cámara a través de14 ventanas de 20cmx20cm en el muro. La eficiencia que presenta esta unidad es la siguiente: -
DBO: 50.5%
-
DQO: 47.7%
-
Sólidos suspendidos: 50%
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CÓDIGO VERSIÓN REVISIÓN PÁGINA
19 de 50
Para asegurar un adecuado tiempo de contacto de cloro, se contará con una cámara de contacto de cloro, con un compartimiento de 0.8 m de ancho, largo total (eje) de 6.80 m y altura útil de 0.9m, con lo que se garantiza un tiempo de contacto de cloro de 30 minutos. En esta unidad se espera una eficiencia de remoción de Coliformes totales de 99%.
Se proyecta la construcción de los lechos de secado de lodos existentes con dimensiones interiores finales de 4.00x7.00x0.90 m. Se proyecta cada lecho de secado con un medio filtrante de altura de 0.45 m conformado por grava y arena, sobre el cual se colocarán ladrillos. El lodo será depositado en altura máxima de 0.35m. El agua del lodo que percolará el material filtrante será recolectado mediante canales ubicados al fondo de la estructura y llevado a una cámara de reunión para ser retornados al tren de tratamiento.
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CÓDIGO VERSIÓN REVISIÓN PÁGINA
20 de 50
Comprende el tratamiento preliminar, donde serán retirados los sólidos de tamaño mayor a 2cm que vienen en el agua residual cruda. La unidad está conformada por una estructura rectangular de concreto de dimensiones interiores de 0.5x2.35x0.8m, la cual albergara rejas de 1cm de espesor instaladas a una separación de 2 cm con un ángulo de inclinación de 45˚. La cámara de rejas contara con un canal de bypass, que funcionara en caso que las
rejas de obstruyan o durante trabajos de mantenimiento.
Esta unidad brindara el tratamiento primario, removiendo principalmente sólidos suspendidos, demanda bioquímica de oxigeno (DBO), demanda química de oxigeno (DQO). El principio del Reactor con bafles es lograr la remoción de contaminantes a través del
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CÓDIGO VERSIÓN REVISIÓN PÁGINA
21 de 50
Los Biofiltros tienen dimensiones interiores de 2.50x3.30x1.80m. El lecho filtrante tiene una altura de 2.30 m y está conformado por grava, los 0.90m iniciales de diámetro de 7.510cm y la altura restante de diámetro de 4.0-7.5cm. El dren presenta una altura de 0.4m. Para asegurar la distribución uniforme en todo el medio filtrante sobre este se tiene una altura de agua promedio de 0.45m. El ingreso a las unidades se realiza mediante tuberías de HDPE con diámetro de 90mm. La eficiencia que presenta esta unidad es la siguiente: -
DBO: 48.5%
-
DQO: 45.8%
-
Sólidos suspendidos: 80%
-
Coliformes fecales: 01 log
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CÓDIGO VERSIÓN REVISIÓN PÁGINA
Cuadro 23. Eficiencia total de la PTAR 03
DBO 5
mg/L
185,0
75%
47,11
DQO
mg/L
309,9
72%
87,93
22 de 50
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CÓDIGO VERSIÓN REVISIÓN PÁGINA
23 de 50
La PTAR contará con 03 Reactores con bafles, de cinco (05) cámaras en cada unidad, los cuales trabajaran en paralelo. La dimensión exterior de la unidad de 7.95x5.70x3.25m. Las dimensiones útiles de cada cámara son de 0.90x5.50x2.50m. El agua residual ingresa por la parte superior a las cámaras a través de 14 tuberías de HDPE de diámetro de 90mm. Existen pantallas transversales que sirven para conducir el agua
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CÓDIGO VERSIÓN REVISIÓN PÁGINA
24 de 50
Para asegurar un adecuado tiempo de contacto de cloro, se contará con dos cámaras de contacto de cloro, con un compartimiento de 0.8 m de ancho, largo total (eje) de 10.00 m y altura útil de 0.9m, con lo que se garantiza un tiempo de contacto de cloro de 30 minutos. En esta unidad se espera una eficiencia de remoción de Coliformes totales de 99%.
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25 de 50
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CÓDIGO VERSIÓN REVISIÓN PÁGINA
1.0. DATOS Pobl aci ón Caudal Promedio Caudal Máxi mo Horario
Pob= Qp= Qmh=
1.463,00 2,51 4,52
hab l/s l/ l /s
26 de 50
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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Trusted by over 1 million members
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