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Design of slow sand filters for water treatment Respects the NBR12216 standard Filter
Flow Flux Area !dth/"en#ht $ s%uare shape $ " '!ameter $ c!rcular shape $ ' A(era#e sand sand part!cle d!ameter d!ameter )and *ed he!#ht +3 ,!n!mum wa water he he!#ht o( o(er th the -!-!ltrat!on *e *ed +2 +2 ,ax!mum water he!#ht o(er (er the -!ltrat!on *ed +1 +e!#ht o- the !nter$compartment channel +" +e!#ht o- the compact -!lter +c +e!#ht o- the con(ent!onal des!#n -!lter +
Conventional layout (single chamber)
0.6 m³/h 0.2 m/h 3 m² 1.& m 2.0 m 0.3 mm 1m 0.3 m 0.m 0.10 m 1. m 2.1 m
$ )low sand -!lters cannot *e *ac7washed. he top o- the -!lter *ed should *e scraped 82 $ cm9 e(er t!me the
Dimensionamento de Filtros entos Atende a norma NBR12216 Filtro
=a;>o axa ?rea "ateral $ %uadrado $ " '!@metro $ c!rcular $ ' '!@metro dos #r>os de are!a ro-und!dade do le!to de are!a +3 Altura mn!ma de #ua ac!ma da are!a +2 Altura mx!ma da #ua so*re a are!a +1 Altura do canal de !nterl!#aC>o +" Altura do tan%ue compacto +c Altura do tan%ue con(enc!onal +
!rran"o Convencional
0.6 m³/h 0.2 m/h 3 m² 1.& m 2.0 m 0.3 mm 1m 0.3 m 0. m 0.10 m 1. m 2.1 m
!rran"o Compacto (2 c#maras)
L ou D
HL H1
H1
H H2
H2
L
HC
H3
Fluxo H4
H3
Fluxo
Camadas de base
Doe-!c!ente de un!-orm!dade das camadas Base super!or $ Are!a $ '!@metro Base super!or $ Are!a $ Espessura +4 Base !ntermed!r!a$ )e!xos $ '!@metro Base !ntermed!r!a $ )e!xos $ Espessura + Base !n-er!or $ )e!xos $ '!@metro Base !n-er!or $ )e!xos $ Espessura +6
1.3 1.3 mm 0.10 m mm 0.1 m 10 mm 0.1 m
H5
H6
Notas sobre a opera$%o:
HL
$ F!ltros lentos n>o podem ser contrala(ados. A camada super!or da are!a 82 a cm9 de(e ser raspada %uand