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All Journal Equilibrium Journal of Chemical Engineering Politeknosain
Nur Hidayati
Teknik Kimia, Universitas Muhammadiyah Surakarta
Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering

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Karakteristik Bioplastik Kitosan-Onggok Aren (Arenga pinnata) dengan Penambahan Serbuk Kunyit Suwardi Suwardi; Nur Hidayati
Equilibrium Journal of Chemical Engineering Vol 4, No 2 (2020): Volume 4 No 2 December 2020
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v4i2.47911

Abstract

Abstrak. Bioplastik merupakan plastik organik yang salah satu fungsinya dapat digunakan sebagai pengemas bahan pangan. Bioplastik dikenal ramah lingkungan karena mudah terdegrasi oleh alam. Kitosan dapat dimodifikasi dengan pati onggok aren dalam pembuatan bioplastik untuk meningkatkan kekuatan bioplastik. Penambahan kunyit ke dalam bioplastik kitosan-serat onggok diharapkan dapat meningkatkan ketahanan terhadap mikroba sehingga bioplastic tersebut dapat digunakan sebagai bahan kemasan makanan.  Penelitian ini bertujuan untuk mengetahui karakteristik bioplastik kitosan-onggok aren yang ditambah kunyit dengan variasi 0,3- 1,2 %. Uji fisik yang dilakukan meliputi uji daya serap air, uji kuat tarik, uji elongisitas dan uji biodegradasi. Peningkatan banyaknya kunyit dalam air meningkatkan sifat daya serap air, kuat tarik dan biodegradasinya, sedangkan penurunan kemuluran plastik berkurang dengan peningkatan banyaknya kunyit dalam plastik.Abstract. Bioplastics are organic plastics which one of their functions can be used as food packaging. Bioplastics are known to be environmentally friendly because they are easily degraded by nature. Chitosan can be modified with onggok palm starch in making bioplastics to increase the strength of the bioplastics. The addition of turmeric to the chitosan-onggok bioplastic is expected to increase resistance to microbes so that the bioplastic can be used as a food packaging material. This study aims to determine the bioplastic characteristics of chitosan-onggok palm sugar added with turmeric with a variation of 0.3-1.2%. Physical tests carried out include water absorption test, tensile strength test, elongicity test and biodegradation test. The increase in the amount of turmeric in water increases its water absorption, tensile strength and biodegradation properties, while the decrease in plastic elongation decreases with the increase in the amount of turmeric in the plastic.
Penurunan Kadar COD dan TSS dengan Menggunakan Teknik Pipe Filter Layer pada Limbah Industri Keripik Singkong Siti Fatimah; Najmudin A. Mumtaz; Nur Hidayati
Politeknosains Vol 15 No 2 (2016): Jurnal Politeknosains Volume 15 Nomor 2 - September 2016
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Politeknik Pratama Mulia Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (400.494 KB)

Abstract

Cassava contains hydrocyanic acid (HCN) derived from the hydrolysis process cyanogenic glucoside (linamarin and lotaustralin) by endogenous enzymes that are marked in blue on cassava. Production of cassava chips contained in Donohudan, Surakarta very abundant with a turnover of 10 tons each month so that the production process produces some waste that has no economic value. Wastewater from the washing of cassava chips can be a serious problem if not treated properly. Mechanical installation of pipe filter layer may be one alternative to resolve these problems .. This technique uses a combination of natural adsorbent with terraced flowed into the pipe. The adsorbent used include gravel, sepet (coconut fiber), silica sand, zeolite. The parameters examined in this study is the analysis of the levels of COD (Chemical Oxygen Demand) and TSS (Total Solid Suspended) in the wastewater industry cassava chips. Data collection was performed by calculating the COD and TSS levels before and after processing with pipe filter layer. Based on data obtained optimum pH value accordance with the standard of food waste that is 7.89. For COD and TSS, the optimum value changes occurred on respectively of 99.5% and 99.7%. Mechanical pipe filter layer effectively handle the wastewater industry cassava chips
Co-Authors Najmudin A. Mumtaz Siti Fatimah Suwardi, Suwardi