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All Journal Biofoodtech : Journal of Bioenergy and Food Technology
Reni Astuti Widyowanti
Program Studi Teknologi Hasil Pertanian, Fakultas Teknologi Pertanian INSTIPER Yogyakarta
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering

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Sifat Kimia, Fisika dan Organoleptik Selai Kulit Buah Nanas Wahyu Mega Nanda; Reni Astuti Widyowanti; Ida Bagus Banyuro Partha
BIOFOODTECH : Journal of Bioenergy and Food Technology Vol. 2 No. 02 (2023): Desember
Publisher : Program Studi Teknologi Hasil Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55180/biofoodtech.v2i02.784

Abstract

Jam is a semi-solid food product made from a mixture of sugar and fruit. In this study, pineapple peel waste was used as the main ingredient for making jam because the use of pineapple peels is still unknown to the general public. The purpose of this study was to see the effect of adding sugar and natural citric acid on the chemical, physical and organoleptic properties of pineapple peel jam. The experimental design used the Randomized Complete Block Design (RCDB) method with 2 factors, namely the addition of sugar and the addition of natural citric acid from lime, lemon and lime with 2x repetition. The test parameters used were water content, pH, vitamin C, flavonoids, anthocyanin, and organoleptic including taste, aroma, color, and spreadability. The results showed that the addition of sugar had an effect on the test for water content, pH, vitamin C, flavonoids, and viscosity. The addition of citric acid had an effect on the water content, pH, vitamin C, flavonoids, viscosity, and anthocyanin tests. For the organoleptic test of pineapple rind jam the panelists were most interested in were the samples treated with the addition of 50% sugar and the addition of natural citric acid from lime (K3G3) with a moderately favorable score (5.01).  
Pengaruh Jenis dan Penambahan Pengasam Alami terhadap Sifat Fisik dan Kimia Sirup Pepino Senja Oktavia; Reni Astuti Widyowanti; Adi Ruswanto
BIOFOODTECH : Journal of Bioenergy and Food Technology Vol. 3 No. 2 (2024): Desember
Publisher : Program Studi Teknologi Hasil Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55180/biofoodtech.v3i2.1297

Abstract

This study aimed to: (1) determine the effect of type and addition of natural acidifier on the characteristics of pepino syrup; (2) determine the composition of type and addition of natural acidifier that produces pepino syrup that is most preferred by panelist. This research used the Completed Blok Design (CBD) method with 2 factors. The first factor was the type of citrus (A) with 3 levels, namely (A1 = lime), (A2 = lemon), (A3 =squeezed citrus). The second factor was the addition of natural acidifier based on the volume base of 200 ml pepino juice with 3 levels, namely (B1=2,5%), (B2=5%), (B3=7,5%). The results showed that the type of orange and the addition of natural acidifier influenced all physical properties (viscosity, total color difference), chemical properties (total soluble solids, pH, vitamin C, and antioxidants), and organoleptic (color, aroma, taste) of pepino syrup. Sample A3B2 with the type of squeezed oranges and the addition of 5% natural acidifier was the most favored pepino syrup by panelists with a score of 6, category like.
Pengaruh Perbedaan Jenis Kulit Kopi dan Penambahan Daun Rosemary (Rosmarinus officinalis) terhadap Karakteristik Cascara Celup Awido Butar-Butar; Sunardi; Reni Astuti Widyowanti
BIOFOODTECH : Journal of Bioenergy and Food Technology Vol. 3 No. 1 (2024): JUNI
Publisher : Program Studi Teknologi Hasil Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55180/biofoodtech.v3i1.1324

Abstract

The objectives of this study are: (1) to determine the effect of coffee skin type with the addition of rosemary leaf powder on the characteristics of cascara dip; (2) to know the formulation of the type of coffee skin with the addition of rosemary leaf powder that produces the most preferred cascara dip for the panelists. The latest in this study is an innovation to eliminate the taste of cascara with rosemary leaf powder, as well as practical and contemporary presentation in the form of dip cascara. The research will use 2 factors. The first factor is type coffee skin (A) with 3 levels, namely A1= arabica coffee skin, A2= robusta coffee skin, and A3 = arabica and robusta coffee skin blend with a 1:1 ratio. The second factor is the addition of rosemary leaf powder by weight of cascara with 3 levels, namely B1= 2%, B2= 4%, and B3= 6%. The results of the study showed that: (1) The type of coffee skin with the addition of rosemary leaves had an effect on the tannin content, taste, and color of the cascara dip. But it has no effect on antioxidant levels, caffeine levels, total acidity, total color difference, and aroma. (2) Cascara dip made from arabica coffee bark with the addition of 2% rosemary leaves (A1B1) is a cascara that consumers prefer (somewhat like) has an antioxidant level of A1B1 37.397%, caffeine 0.97%, tannins 0.0080, total acid 0.109, total color difference 29.173, moisture content 5.57% and ash content 1.815%.
Karakteristik Papan Komposit dengan Substitusi Tandan Kosong Kelapa Sawit (TKKS) dan Perlakuan Susunan Serat Alwi Mashudin Yahya; Ida Bagus Banyuro Partha; Reni Astuti Widyowanti
BIOFOODTECH : Journal of Bioenergy and Food Technology Vol. 4 No. 1 (2025): JUNI
Publisher : Program Studi Teknologi Hasil Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55180/biofoodtech.v4i1.1859

Abstract

Composite boards are generally made from plastic and natural wood, on the one hand, oil palm empty fruit bunches (TKKS) which are palm oil mill waste contain lignocellulose which is one of the requirements for composite board making materials. This study aims to determine the effect of TKKS fiber substitution on composite boards, determine the effect of TKKS fiber arrangement on composite boards, determine the composition of TKKS substitution and TKKS fiber arrangement that produces composite boards that are suitable for their uses. This research uses the Complete Block Design (RBL) method with 2 factors. The first factor is the substitution of TKKS based on 20 grams of sengon powder with 3 levels, namely 40% (8 grams), 50% (10 grams), 60% (12 grams). The second factor is the arrangement of the TKKS fibers with 3 levels, namely random, parallel, cross. The results of this study indicate that the substitution of TKKS with sengon powder base affects the chemical properties, namely water content, as well as physical properties in the form of water absorption, thickness development, density, porosity, and flexibility in composite boards. The arrangement of TKKS fibers affects the physical properties which include water absorption, thickness development, density, porosity, and flexibility of the composite board. The best results of this study were found in the treatment of 40% sengon powder: 60% TKKS fiber with an average value of 3,493% moisture content, 27,581% water absorption, 2,241% thick development, 2,13 g/cm3 density, 27,189% porosity, and 63.641 kgf/cm2 flexibility value is the most brittle sample so it is suitable to be applied to furniture such as tables, cabinets, and stacking shelves.  
Co-Authors Adi Ruswanto Alwi Mashudin Yahya Awido Butar-Butar Ida Bagus Banyuro Partha Senja Oktavia Sunardi Wahyu Mega Nanda