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POLLUTION PEAK FLOW [3 records]

Record 1 2001-05-23

English

Subject field(s)
  • Water Treatment (Water Supply)
CONT

Influent flow control to increase the pollution load treated during rainy periods... As for the system management, the French Decree of 22 December 1995 states that flows or pollution loads exceeding the reference capacity of the treatment plant may be temporarily admitted. This is especially interesting in the case of separate wastewater sewerage, as inappropriate connections of runoff water and rainfall induced infiltration cause hydraulic overloads in such networks. An automated influent flow control has been implemented on a 8000 population equivalent plant to admit a maximum of twice the dry weather peak flow : the clarifier is then dynamically managed so that neither sludge loss nor degradation through anoxic conditions may occur.

CONT

Sewer: Union Sanitary District. The District has a maximum capacity of 29.5 million gal/day. Dry weather peak flow is 24 million gal/day. Service charges are based on the volume and quality of discharge.

French

Domaine(s)
  • Traitement des eaux
DEF

Débit maximum d'arrivée des effluents pour les installations alimentées par des réseaux séparatifs.

CONT

Les caractéristiques principales de l'eau à traiter sont les suivantes : Volume journalier : 2695 m3/j; Débit spécifique : 350 1/EH/j; Débit moyen : 112 m3/h; Débit de pointe de temps sec : 193 m3/h; Débit de pointe de temps de pluie : 325 m3/h.

Spanish

Save record 1

Record 2 2001-05-23

English

Subject field(s)
  • Water Treatment (Water Supply)
CONT

The San Jose/Santa Clara Water Pollution Control Plant(Plant)... Over the past several years, the service area population of the Plant has grown significantly. The total dry-weather influent volume from ultimate build-out of the Plant's service area is projected to be 180 million gallons per day(mgd), which is the recommended value for setting aside land required for ultimate wastewater treatment capacity for the future. Wet weather peak flow capacity issues will require additional land be set aside.

CONT

Continued growth in the Mendenhall and Lemon Creek Valleys required new wastewater collection systems. Ten new pumping stations and associated interceptor sewers were added to carry wastewater to the ABF Facility. Development continued and 1982, the ABF Facility was treating 2.0 mgd daily and was again over design capacity during wet weather peak flow periods with influent flows of 4.0+ mgd. Correction of inflow and infiltration (1 and 1) in the collection system began. However, an expansion of treatment capacity was required by the Environmental Protection Agency (EPA) to reduce the numerous discharge permit violations.

French

Domaine(s)
  • Traitement des eaux
DEF

Débit maximum d'arrivée des effluents pour les installations alimentées par des réseaux unitaires.

CONT

Les caractéristiques principales de l'eau à traiter sont les suivantes : Volume journalier : 2695 m3/j; Débit spécifique : 350 I/EH/j; Débit moyen : 112 m3/h; Débit de pointe de temps sec : 193 m3/h; Débit de pointe de temps de pluie : 325 m3/h.

OBS

La détermination du débit de pointe de temps de pluie est indispensable pour le dimensionnement des équipements hydrauliques (Agence de Bassin Loire-Bretagne, Lagunage naturel et lagunage aéré, 1981, p. 4).

Spanish

Save record 2

Record 3 1981-01-26

English

Subject field(s)
  • Wastewater Treatment
CONT

... the need to adapt plant to clearly-understood peak flows and peak concentrations of pollution; ...

Key term(s)
  • pollution peak flow

French

Domaine(s)
  • Traitement des eaux usées
CONT

[...] la nécessité d'adapter les équipements à des pointes de pollution en débit ou en concentration, ces pointes devant être bien appréciées; [...]

Spanish

Save record 3

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