Perhitungan Kebutuhan Desinfektan-Tawas Ipal 2 [PDF]

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PERHITUNGAN KEBUTUHAN DESINFEKTAN



Jumlah Tempat Tidur = 654 TT Kebutuhan air bersih = Jumlah TT x 550 lt/bed/hari = 654 x 550 = 359.700 liter/hari Jumlah air limbah



= 80% x Jumlah air bersih = 80% x 359.700 liter/hari = 287.760 liter/hari = 287,8 m3/hari



Debit (Q)



= 359.700 liter/hari = 4,2 liter/detik



DPC Sisa Chlor



= 1,5 ppm = 0,7 ppm



Dosis Kaporit 60% (DK)



Kebutuhan kaporit



= 0,7 + 1,5 x 100 60 = 3,7 ppm (mg/lt) = = = =



Q x DK 4,2 lt/dt x 3,7 mg/lt 1,3 kg/hari 39 kg/bulan



kebutuhan / bulan



= = = = =



Q x DK 4,2 lt/dt x 3,6 mg/lt 15,54 mg/dt = 1,3 kg/hari 39 kg/bulan 2,6 Pill dibulatkan 3 Pill / bulan



Harga 1 Pill Harga total



= Rp245.000,= Rp735.000,-



Kebutuhan kaporit



= 15,54 mg/dt = 1.342.656 mg/hari



1 Pill = 15 kg



PERHITUNGAN KEBUTUHUAN KOAGULAN



Jumlah Tempat Tidur = 654 TT BOR = 60% Kebutuhan air bersih = Jumlah TT x BOR x 500 lt/bed/hari = 654 x 60% x 500 = 196.200 liter/hari Jumlah air limbah



= 80% x Jumlah air bersih = 80% x 196.200 liter/hari = 156.960 liter/hari = 157 m3/hari



Debit (Q)



= 156960 liter/hari = 1,8 liter/detik



Density Tawas



= = = =



Kebutuhan tawas



= 0,54 gr/dt x 86400 dt = 46656 gr/hari = 46,7 kg/hari = 1.401 kg/bulan



W (persen)



= Kebutuhan tawas 60%



1,05 kg/lt 0,3 gram = 300 mg/lt 0,3 x 1,8 = 0,54 gr/dt 540 mg/dt



= = 77,8 kg/hari



Volume tawas



=



= = 74,1 lt/hari Perbandingan Volume tawas : Volume air = 20% : 80% Volume Bak = 650 lt = 130 lt Tawas : 520 lt air Debit tetesan = Volume bak / 86400 dt = 650/86400 = 0,00752 lt/dt



= 0,752 ml/dt