‘Uyun, Qurrotul (2018) Analisis lama penyimpanan yoghurt menggunakan box sekam padi sebagai sarana menjaga baku mutu yoghurt berdasarkan suhu, pertumbuhan bakteri dan pH pada yoghurt. Undergraduate thesis, Universitas Islam Negeri Maulana Malik Ibrahim.
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Abstract
INDONESIA:
Yoghurt merupakan olahan susu melalui proses fermentasi dengan bantuan bakteri asam laktat Lactobacillus bulgaricus dan Streptococcus thermophilus. Yoghurt memiliki manfaat sebagai prebiotik tubuh sehingga banyak dikonsumsi oleh masyarakat. Distributor harus memenuhi kebutuhan konsumen dan menjaga kulitas yogurt melalui tehnik penyimpanan dan sanitasi yang baik. Penelitian ini bertujuan untuk mengetahui lama penyimpanan yoghurt menggunakan box steroform dan box sekam padi berdasarkan suhu, pertumbuhan bakteri dan pH pada yoghurt. Metode penelitian yang dilakukan adalah menyiapkan yoghurt plain dengan kultur bakteri Lactobacillus bulgaricus yang telah dibekukan selama 3x24 jam kemudian yoghurt disimpan pada box steroform dan box sekam padi dengan nilai densitas ρ = 0,09 gram/cm3, ρ = 0,11 gram/cm3,dan ρ = 0,13 gram/cm3 selama 0-10 jam. Hasil analisis menunjukkan bahwa box penyimpanan yang efisien adalah box sekam padi dengan nilai densitas ρ = 0,13 gram/cm3. Didapatkan hasil berturut-turut yaitu suhu yoghurt mengalami kenaikan dari -2,5 menjadi -1,5 ˚C, pertumbuhan koloni bakteri Lactobacillus bulgaricus menghasilkan nilai Total Plate Count (TPC) dengan mengalami kenaikan dari 45,2x107 menjadi 53,4x107 CFU/ml dan pH yoghurt mengalami penurunan dari 4,5 menjadi 4,3. Hasil di atas masih berada pada standart SNI yoghurt. Pendekatan eksponensial menggunakan softwere Origin didapatkan lama penyimpanan yoghurt berturut-turut yaitu 45 jam, 47 jam, dan 45 jam.
ENGLISH:
Yogurt is processed milk through fermentation process with the lactic acid help of bacteria of Lactobacillus bulgaricus and Streptococcus thermophilus. Yoghurt has the benefit of being a body prebiotic so it often consumes by society. Distributors must meet the needs of consumers and maintain the quality of yogurt through good storage and sanitation techniques. The research aims at determining the storage time of yogurt using steroform box and rice husk box based on temperature, bacterial growth and pH in yoghurt. The research method was used to prepare yoghurt plain with culture of Lactobacillus bulgaricus bacteria which had been frozen for 3x24 hours then yoghurt was stored on steroform box and rice husk box with density value of ρ = 0,09 gram/cm3, ρ = 0,11 gram/cm3, and ρ = 0.13 gram/cm3 for 0-10 hours. The result of the analysis showed that efficient storage box is box of rice husk with density value of ρ = 0,13 gram/cm3. The results showed that the temperature of yogurt increased from -2.5 to -1.5 ˚C, the growth of Lactobacillus bulgaricus bacteria colonies resulted in the value of Total Plate Count (TPC) with an increase from 45.2x 107 to 53.4 x 107 CFU/ml and yoghurt pH decreased from 4.5 to 4.3. The results above are still in the standard SNI of yoghurt. The exponential approach used Origin software and it was found the yoghurt storage time of 45 hours, 47 hours and 45 hours.
Item Type: | Thesis (Undergraduate) | |||||||||
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Supervisor: | Tirono, Mokhamad and Hastuti, Erna | |||||||||
Contributors: |
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Keywords: | box sekam padi; yoghurt; suhu; bakteri Lactobacillus bulgaricus; ph; rice husk box; yoghurt; temperature; bacteria of Lactobacillus bulgaricus; ph. | |||||||||
Departement: | Fakultas Sains dan Teknologi > Jurusan Fisika | |||||||||
Depositing User: | Heni Kurnia Ningsih | |||||||||
Date Deposited: | 30 Apr 2020 14:05 | |||||||||
Last Modified: | 30 Apr 2020 14:05 | |||||||||
URI: | http://etheses.uin-malang.ac.id/id/eprint/15283 |
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