ITP730 KECUKUPAN PROSES STERILISASI KOMERSIAL: 2....
Transcript of ITP730 KECUKUPAN PROSES STERILISASI KOMERSIAL: 2....
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Purwiyatno HariyadiEmail: [email protected]: phariyadi.staff.ipb.ac.id
ITP 730 – thermal processing of foods - 2018
phariyadi.staff.ipb.ac.id
ITP730
KECUKUPAN PROSES STERILISASI KOMERSIAL:
2. METODA FORMULAKasus Kurva Patah
Purwiyatno Hariyadi• Guru Besar , Rekayasa Proses Pangan, Departemen Ilmu dan Teknologi Pangan,
Fakultas Teknologi Pertanian, IPB-Bogor• Senior Scientist, Southeast Asian Food & Agricultural Science & Tecchnology
(SEAFAST) center, IPB-Bogor• Anggota, Institute For Thermal Processing Specialists (IFTPS), USA
phariyadi.staff.ipb.ac.id
Pemanasandengan KurvaPatah
• Pemanasanbeberapa jenisproduk akanmenunjukkankarakteristikkurvapemanasanyang berbeda, menyimpangdari Gambar
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Purwiyatno HariyadiEmail: [email protected]: phariyadi.staff.ipb.ac.id
ITP 730 – thermal processing of foods - 2018
phariyadi.staff.ipb.ac.id
Pemanasandengan KurvaPatah
• Hal ini dapatdisebabkankarena terjadiperubahankarakteristikpindah panasselama proses pemanasan.
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Pemanasandengan KurvaPatah
4 parameters :• j (faktor lag),
• fh (kemiringankurva pemanasan pertama),
• f2 (kemiringan kurva pemanasan kedua), dan
• xbh (waktu dimanaterjadi patah, yaitupada titikperpotongan antaradua kurvapemanasan).
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Purwiyatno HariyadiEmail: [email protected]: phariyadi.staff.ipb.ac.id
ITP 730 – thermal processing of foods - 2018
phariyadi.staff.ipb.ac.id
Pemanasan dengan Kurva Patah
Lihat Tabel/Gambar
Kasus1:menentukannilaiFojikadiketahuinilaiB.
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Kasus1:menentukannilaiFojikadiketahuinilaiB.
Pemanasan dengan Kurva Patah
Lihat Tabel/Gambar
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Purwiyatno HariyadiEmail: [email protected]: phariyadi.staff.ipb.ac.id
ITP 730 – thermal processing of foods - 2018
phariyadi.staff.ipb.ac.id
Pemanasan dengan Kurva Patah
Lihat Tabel/Gambar
Kasus1:menentukannilaiFojikadiketahuinilaiB.
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Pemanasan dengan Kurva Patah
Kasus2:menentukannilaiB jika dikehendaki nilai Fo tertentu.
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Purwiyatno HariyadiEmail: [email protected]: phariyadi.staff.ipb.ac.id
ITP 730 – thermal processing of foods - 2018
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Perhatikan kurvapemanasan seperti terlihatpada Gambar
TR (Suhu proses) = 240oFPt (lama proses) = 46,8 menitCUT = 8 menit. Suhu awal produk = 167oF.
Hitung berapa nilai Fo?
Teladan
(1)
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DariGambarDapatditentukanbeberapaparameterpemanasansbb:
Teladan
(2)
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Purwiyatno HariyadiEmail: [email protected]: phariyadi.staff.ipb.ac.id
ITP 730 – thermal processing of foods - 2018
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Teladan
(3)
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Teladan
(4)
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Purwiyatno HariyadiEmail: [email protected]: phariyadi.staff.ipb.ac.id
ITP 730 – thermal processing of foods - 2018
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Teladan
(5)
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Ringkasan:Langkah-langkah perhitungan nilai Fo
Teladan
(6)
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Purwiyatno HariyadiEmail: [email protected]: phariyadi.staff.ipb.ac.id
ITP 730 – thermal processing of foods - 2018
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