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PENGGUNAAN NaHSO3 DAN H2O2 UNTUK MENGURANGI KONSENTRASI FORMALDEHID PADA LIMBAH CAIR PENYAMAKAN FORMALDEHID KULIT GOLF SNOW WHITE Prasetyo Hermawan; Titik Anggaraini
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 14 No 2 (2015): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

The effort could be done to reduce formaldehid concentration in the water waste formaldehide glove snow white tannage are react formaldehide with H2O2 and NaHSO3. In this research, mol ratio to formaldTehide in two compound are variation (1: 0,5 , 1:1, 1:2 dan 1:3), then mixing about 1 hour where every 15 minutes we do sampling. The results are more greater mol ratio and time will give more formaldehide concentration could be reduced. From statistic models, shown that mol ratio 1: ½ to 1: 1 not significant in H2O2 compound, in mol ratio 1: 0,5 to 1:1 and 1:1 to1: 2 not significant in NaHSO3 compound. NaHSO3 have more abitllity to reduce formaldehide concentration than H2O2, in mol ratio to formaldehid 1: 3, in 60 minutes shown that 84% formaldehid reduced in NaHSO3 compound and 24% formaldehid reduced in H2O2 compound
PEMANFAATAN LIMBAH KULIT IKAN AYAM-AYAM (Abalistes stellaris) UNTUK BAHAN BAKU PRODUK KULIT lndri Hermiyati; Sri Sumarni; Titik Anggaraini
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 14 No 1 (2015): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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Abstract

The aim of this study is to tan the leather of starry triggerfish (Abalistes stellaris) by formaldehyde. The leather of starry triggerfish was the waste which has been dumped by fishmonger around the coast of Tasik Agung in Rembang. Formaldehyde at concentration 8%, 10% or 12% was added during tanning process. The addition of 8% to 12% of formaldehyde may increase the value of tensile strength of tanned starry triggerfish leather from 47.04 kg/ cm2 up to 77.84 kg/ cm2. While the addition 8% to 12% of formaldehyde decreased the elongation value of tanned starry triggerfish leather from 56.45% to 34.51 %. The addition of 12% formaldehyde was has the best effect to the tensile strength, while the addition of 8% formaldehyde has the best effect to the elongation of tanned starry triggerfish skin. Thermal Gravimetric Analysis (TGA) has a significant influence of decreasing of weight (mass) of tanned starry triggerfish leather samples. Analysis of DTA/DSC showed the best shrinkage temperature at the tanned starry triggerfish leather tanned by 12% formaldehyde can be used as a raw material for leather product, because it has a physical character of high tensile strength and low elongation.
Co-Authors lndri Hermiyati Prasetyo Hermawan Sri Sumarni