MANZANARES BASIN
Wastewater Treatment Plan (WWTP) Sur Oriental
municipality served
tertiary unit description
Rivas-Vaciamadrid
working since
1983
design data
•A
uthorized discharge:
69,120 m3/day
• Population equivalent for designed years(1):
288,000 equivalent inhabitants
water line description
• Pretreatment
- Coarse waste well
- Four coarse waste grids with a mesh size
of 50 cm
- Fine waste grid, 6-mm mesh size (4 units)
- A
erated desanding-degreasing (4 units)
•P
rimary subsidence (4 units with a diameter
of 30 m)
• Biological treatment by means of conventional
activated sludge system with four lines.
• Secondary subsidence (4 units)
• Phosphorous elimination by dosing of ferric
chloride
• Chlorination of the final effluent
• Coagulation
- 2 mixing chambers
- D
osing of alumina sulphate with 2+1
peristaltic pumps with a variator
(power: 0.02 KW)
• Flocculation
- 1 flocculation chamber
- D
osing of polyelectrolyte with 2+1
peristaltic pumps with variator
(power: 0.12 KW)
- pH control
- D
osing of sodium hydroxide with 2+1
peristaltic pumps with a variator
(power: 0.18 KW)
• Lamellar settler
• Disinfection with sodium hypochlorite
- 2 +1 peristaltic pumps with variator
(power: 0.18 KW)
• UV disinfection
- 2 reactors with 18 lamps each
(power of 250 KW per lamp)
sludge line description
• Primary sludge sieving by means of a rotating
sieve (2 units)
• Primary sludge gravity thickening (2 units)
(1)
T H E
I N T E G R AT E D
WAT E R
C YC L E
º
S A N I TAT I O N
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• Biological waste flotation thickening (2 units)
• Anaerobic digestion of sludge (2 units)
• Digested sludge storage (1 unit)
• Sludge dewatering by means of centrifuges
(2 units)
• Primary sludge sieving with rotating sieve
(2 units)
• Primary sludge gravity thickening (2 units)
• Biological waste flotation thickening (2 units)
• Anaerobic digestion of sludge (2 units)
• Digested sludge storage (1 unit)
• Sludge dewatering by means of centrifuges
(2 units)
Population equivalent for the dimensioning of the plants. Calculated as per EU Directive 271/91 and RD 509/96.
W W T P