3. TUTELA DELLE ACQUE (1)

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Corso di consulente tecnico ambientale 2018 DISSABBIATURA Velocità di sedimentazione V s : Ipotesi: - Particella granulosa (sedimenta senza interferire con le altre particelle) - regime di moto laminare (assenza di moti vorticosi nel fluido) Legge di Stokes T° (°C) = densità dell’acqua: = Densità delle particelle D = diametro delle particelle (m) = viscosità dinamica dell’acqua Sabbia: 2650 0 1.781 5 1.518 10 1.307 20 1.002 30 0.798
DISSABBIATURA DIMENSIONAMENTO: Granulometria Stokes - Ipotesi: Particelle sabbiose: Temperatura 20 °C -Log2 D D (mm) V sed (m/h) % passante 2 0,25 2,01E+02 100 3 0,125 5,04E+01 95 4 6,25E-02 1,26E+01 87 OBIETTIVO: rimozione delle particelle con D > 0.03 mm cui corrisponde una velocità di sedimentazione pari a 3,15 m/h ( -Log 2 D > 5 → D > 0,03 mm) 5 3,13E-02 3,15E+00 77 6 1,56E-02 7,88E-01 62 7 7,81E-03 1,97E-01 49 8 3,91E-03 4,93E-02 39 9 1,95E-03 1,23E-02 25 10 9,77E-04 3,08E-03 14 Rapporto lati b A 11 4,88E-04 7,70E-04 5 12 2,44E-04 1,92E-04 0 Assumo una profondità h= 2.5 m L Tempo residenza idraulica:
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Corso di consulente tecnico ambient
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O O O Ortofosfato OH P OH Pirofosfa
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Il presente contributo interviene s
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TRATTAMENTI PRELIMINARI GRIGLIATURA
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TRATTAMENTI PRIMARI SEDIMENTAZIONE
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TRATTAMENTI SECONDARI FANGHI ATTIVI
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Page 265 and 266: Corso di consulente tecnico ambient
Page 303 and 304: PREMESSA e DATI di PROGETTO Caratte
Page 307 and 308: CALCOLO DELLE PORTATE QUANTITÀ DI
Page 309 and 310: SCHEMA A BLOCCHI FILIERA DI TRATTAM
Page 311 and 312: GRIGLIATURA La grigliatura è un tr
Page 315: Corso di consulente tecnico ambient
Page 319 and 320: DISSABBIATURA Osservazioni: 1) Le p
Page 321 and 322: COAGULAZIONE-FLOCCULAZIONE AGENTI C
Page 323 and 324: COAGULAZIONE-FLOCCULAZIONE FLOCCULA
Page 325 and 326: COAGULAZIONE-FLOCCULAZIONE Dosaggio
Page 337 and 338: 3) Spessore del letto filtrante Nor
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