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Endar Puspawiningtiyas
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KAJIAN SIFAT FISIK FILM TIPIS NATA DE SOYA SEBAGAI MEMBRAN ULTRAFILTRASI Endar Puspawiningtiyas; Neni Damajanti
Techno (Jurnal Fakultas Teknik, Universitas Muhammadiyah Purwokerto) Vol 12, No 1 (2011): Techno Volume 12 No 1 April 2011
Publisher : Universitas Muhammadiyah Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (377.346 KB) | DOI: 10.30595/techno.v12i1.23

Abstract

“Whey” is one of liquid waste water that was produced from tofu making process. There are many research that process whey to waste water that ready to dispose. One of whey utilization to product that more useful is as of nata making raw material, that often called nata de soya. The contain of nata is cellulose (Bergenia,1982). Cellulose that produced via fermentation process by bacteria often called microbial cellulose. Based of physic and chemical properties that owned by microbial cellulose, be required a study about possibility nata de soya as separated membrane especially ultrafiltration membrane. The Goal of this research are to study about influence of NaOH and H2SO4 concentration to density, swelling degree, water flux, nata de soya membrane rejection. The result of this research show that NaOH and H2SO4 treatment influence to phisical and chemical properties of nata de soya thin layer. Greatest density and smallest swelling degree are 0,94gr/cm3 and 210% at NaOH 6 % treatment. Greatest density and smallest swelling degree are 0,92gr/cm3 and 216% at H2SO4 8 % treatment. Flux value generated at several NaOH concentration average 18,89 Lm-2jam-1bar-1. By Murder (1996), ultrafiltration membrane has operational presure range 1.0 – 5.0 bar and water flux 10 -50 Lm-2jam-1bar-1, thus flux test result show that nata de soya thin layer adequate as ultrafiltration membrane. Smallest water flux value is obtained at NaOH 6 % concentration is 15.68 Lm-2jam-1bar-1. Fluctuating graph at influence of NaOH concentration to rejection coefficient has not been able to conclude best treatment to obtain maximum rejection coefficient, but overall average rejection coefficient at NaOH treatment to nata de soya thin layer is 47,6%. Keyword : ultrafiltration membrane, nata de soya
KAJIAN AWAL PEMANFAATAN LIMBAH TEPUNG TAPIOKA SEBAGAI SUBSTRAT PEMBUATAN NATA Endar Puspawiningtiyas; Anwar Ma’ruf
Techno (Jurnal Fakultas Teknik, Universitas Muhammadiyah Purwokerto) Vol 14, No 2 (2013): Techno Volume 14 No 2 Oktober 2013
Publisher : Universitas Muhammadiyah Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (529.156 KB) | DOI: 10.30595/techno.v14i2.94

Abstract

Proses pengolahan singkong menjadi tepung tapioka menghasilkan limbah sekitar 2/3 bagian atau sekitar 75% dari bahan mentahnya. Limbah yang dihasilkan dapat berupa limbah cair dan limbah padat. Beberapa fakta menunjukkan bahwa limbah tapioka menimbulkan dampak pencemaran lingkungan yang serius. Nadiyah dkk, 2005 melaporkan kemampuan bakteri Acetobacter xylinum untuk mengubah karbohidrat pada limbah padi (bekatul) menjadi selulosa nata. Limbah tepung tapioka mengandung 67.93 – 68.30% karbohidrat. Hal ini menjadikan limbah tapioka juga mempunyai potensi sebagai bahan baku nata. Tujuan dari penelitian ini adalah membuktikan kemampuan bakteri Acetobacter xylinum untuk mengubah karbohidrat pada limbah tapioka menjadi nata dan menjajaki potensi dua jenis limbah tapioka yaitu limbah padat dan cair sebagai substrat pembuatan nata. Dari hasil pengamatan tebal nata yang dihasilkan pada proses fermentasi limbah tapioka menunjukkan bahwa bakteri Acetobacter xylinum mampu mengubah karbohidrat menjadi nata. Limbah cair tapioka memberikan produk nata yang lebih tebal dibandingkan dengan limbah padat maupun campuran antara limbah cair padat. Pembuatan nata dari limbah padat tapioka dapat langsung melalui proses fermentasi tanpa dipecah dahulu menjadi glukosa melalui proses hidrolisis seperti yang dilaporkan Lubis, 2009 dan Badger,P, 2002 Kata Kunci : Nata de cassava, Acetobacter xylinum, nata
Co-Authors Anwar Ma’ruf Neni Damajanti