Table 1

Treatment alternatives . | X < 30,000 p.e.
. | X > 30,000 p.e.
. |
---|---|---|

Primary treatment | Y = 0.317–9 × 10^{−6} × X | Y = 0.132–5 × 10^{−7} × X |

Secondary treatment | Y = 0.474–7 × 10^{−6} × X | Y = 0.309–4 × 10^{−7} × X |

Filtration | Y = 0.507–7 × 10^{−6} × X | Y = 0.342–4 × 10^{−7} × X |

Nitrification/denitrification + filtration | Y = 0.559–8 × 10^{−6} × X | Y = 0.369–5 × 10^{−7} × X |

Nitrification/denitrification + phosphate removal + filtration | Y = 0.602–8 × 10^{−6} × X | Y = 0.393–5 × 10^{−7} × X |

Coagulation–flocculation | Y = 0.939–2 × 10^{−5} × X | Y = 0.471–5 × 10^{−7} × X |

Carbon adsorption | Y = 1.132–1 × 10^{−5} × X | Y = 0.730–5 × 10^{−7} × X |

Reverse osmosis | Y = 1.503–2 × 10^{−5} × X | Y = 0.907–5 × 10^{−7} × X |

Treatment alternatives . | X < 30,000 p.e.
. | X > 30,000 p.e.
. |
---|---|---|

Primary treatment | Y = 0.317–9 × 10^{−6} × X | Y = 0.132–5 × 10^{−7} × X |

Secondary treatment | Y = 0.474–7 × 10^{−6} × X | Y = 0.309–4 × 10^{−7} × X |

Filtration | Y = 0.507–7 × 10^{−6} × X | Y = 0.342–4 × 10^{−7} × X |

Nitrification/denitrification + filtration | Y = 0.559–8 × 10^{−6} × X | Y = 0.369–5 × 10^{−7} × X |

Nitrification/denitrification + phosphate removal + filtration | Y = 0.602–8 × 10^{−6} × X | Y = 0.393–5 × 10^{−7} × X |

Coagulation–flocculation | Y = 0.939–2 × 10^{−5} × X | Y = 0.471–5 × 10^{−7} × X |

Carbon adsorption | Y = 1.132–1 × 10^{−5} × X | Y = 0.730–5 × 10^{−7} × X |

Reverse osmosis | Y = 1.503–2 × 10^{−5} × X | Y = 0.907–5 × 10^{−7} × X |

*Y* indicates the unit cost in €/m^{3}.

*X* indicates the number of population equivalent (p.e.).

For *X* < 1,000 p.e., a constant cost is assumed equal to that obtained for 1,000 p.e.

For *X* > 200,000 p.e., a constant cost is assumed equal to that obtained for 200,000 p.e.

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