Nofiyanti, Estin
Universitas PGRI Madiun

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Sintesis dan Karakterisasi Busa Poliuretan dari Minyak Goreng Bekas dan Toluen Diisosianat dengan Penambahan PEG-400 Nofiyanti, Estin; Mariam, Nida
CHEESA: Chemical Engineering Research Articles Vol 1, No 1 (2018)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (709.359 KB) | DOI: 10.25273/cheesa.v1i1.2632

Abstract

Penelitian yang telah dilakukan bertujuan untuk mensintesis busa poliuretan dari minyak goreng bekas dan Toluen Diisosianat (TDI) dengan penambahan PEG-400 serta karakterisasi busa poliuretan yang terbentuk. Minyak goreng bekas dikonversi terlebih dahulu menjadi poliol sebelum direaksikan dengan TDI. Polimerisasi dilakukan pada temperatur kamar dengan variasi komposisi poliol minyak goreng bekas–TDI - PEG 400 yaitu (2:1,5:0); (2:1,5:1); (2:1,5:2);  dan (2:1,5:3). Karakterisasi poliuretan hasil meliputi penentuan gugus fungsi menggunakan FTIR, jumlah ikatan silang menggunakan derajat penggembungan, dan sifat termal poliuretan menggunakan DTA. Poliuretan berhasil disintesis dari polyol minyak goreng bekas-PEG-400-TDI ditunjukkan adanya serapan  karakteristik poliuretan dari spektra FTIR. Penambahan PEG-400 dapat menyempurnakan polimerisasi dan meningkatkan derajat penggembungan (ikatan silang semakin sedikit). Pengujian sifat termal poliuretan optimum dengan komposisi  polyol minyak goreng bekas–TDI - PEG 400  (2 : 1,5 : 1) menunjukkan bahwa temperatur transisi gelas sebesar 256 oC dan temperatur degradasinya sebesar 275 oC.
Sosialisasi Pengelolaan Limbah Dapur Serta Program 3R (Reuse, Reduce, Recycle) Bagi Pemilik Rumah Makan dan Jasa Boga di Wilayah Kota Tasikmalaya Mellyanawaty, Melly; Nofiyanti, Estin; Ibrahim, A; Salman, N; Nurjanah, N; Mariam, N
ABDIMAS: Jurnal Pengabdian Masyarakat Vol 1 No 2 (2018): ABDIMAS UMTAS: Jurnal Pengabdian Kepada Masyarakat
Publisher : LPPM Universitas Muhammadiyah Tasikmalaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (161.514 KB) | DOI: 10.35568/abdimas.v1i2.324

Abstract

Society services activity in kitchen waste management system has been implemented to the owner of restaurant and catering work in Tasikmalaya City area. This activity has colaborated with Indonesian Catering Associations (APJI). The rapid growth of restaurant and catering activities has created serious problems of energy requirement, water, and solid waste disposal. Less information and limited area become the problems in handling of kitchen waste. A simple technique is needed to overcome the environmental problem which is caused by kitchen waste. The components of kitchen waste include vegetables, peelings, fruit skins, spoilt fruit, cooked and uncooked meat, bones, fats, egg-shells, bread and pastries, cooked food waste, etc. Due to a high organic content, bioconversion technologies such as anaerobic digestion are more suitable to handle the waste convert to biogas. It would be reducing the LPG usage. For the kitchen wastewater, grease trap as pre-treatment followed by a physical and biological process is one of a simple process which can produce the effluent in accordance with government standard. The activities were continued by the socialization of 3R program (reuse, reduce, recycle) by doing demo utilization of kitchen solid waste such as packing material, mineral water bottle is made a handicraft. Knowledge transfer run well and the enthusiasm of the participants in following the activity were very good.
Proses Peruraian Anaerobik Palm Oil Mill Effluent dengan Media Zeolit Termodifikasi Mellyanawaty, Melly; Alfiata Chusna, Firda Mahira; Nofiyanti, Estin
Jurnal Rekayasa Proses Vol 13, No 1 (2019)
Publisher : Departemen Teknik Kimia Fakultas Teknik Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.39206

Abstract

A B S T R A C TThis work evaluated the effect of modified zeolite as microbial immobilization medium in anaerobic digestion of palm oil mill effluent (POME). The affinity of microorganisms to attach and grow on the media surface could be increased by the addition of micro-nutrient into the media. The effect of micro-nutrient addition was studied in 1000 mL Erlenmeyer flask as batch reactors. Experiments were conducted for 30 days. The concentration of soluble chemical oxygen demand (COD) in substrate was 8000 mg/L. Zeolite was impregnated with nickel (Ni) and zinc (Zn) at individual concentration of 2.7x10-3 mg Ni/g zeolite and 3.5x10‑3 mg Zn/g zeolite. The influence of each modified zeolite was determined by periodic measurement of sCOD, volatile fatty acid (VFA), pH, and biogas production. Cumulative biogas productions in this study were 252.44; 172.13; 57.70 ml from Ni-modified, Zn-modified and natural zeolites, respectively. The highest sCOD removal was obtained in reactor with Zn-modified zeolite with 38.22% removal, followed by 33.96% with Ni-modified zeolite, and 27.87% removal with natural zeolite.Keywords: anaerobic digestion; biogas; methane; palm oil mill effluent; zeoliteA B S T R A KPenelitian ini mengevaluasi pengaruh zeolit yang dimodifikasi sebagai media imobilisasi mikroorganisme pada proses anaerobik limbah palm oil mill effluent (POME). Afinitas mikroorganisme untuk melekat dan tumbuh di permukaan dapat meningkat dengan impregnasi mikronutrien pada media. Efek penambahan mikronutrien dipelajari dengan labu Erlenmeyer 1000 mL sebagai reaktor batch. Experimen dijalankan selama 30 hari. Konsentrasi soluble chemical oxygen demand (sCOD) substrat yang digunakan adalah 8000 mg/L. Zeolit terimpregnasi Ni dan Zn yang digunakan memiliki kadar 2,7 x10-3 mg Ni/g zeolit dan 3,5x10-3 mg Zn/g zeolit. Pengaruh setiap zeolit yang dimodifikasi dievaluasi dengan mengukur konsentrasi sCOD, volatile fatty acid (VFA), pH, dan produksi biogas secara periodik. Akumulasi biogas penelitian ini sebesar 252,44; 172,13; 57,70 ml berturut-turut untuk zeolit modifikasi Ni, zeolit modifikasi Zn dan zeolit alam. Penurunan sCOD terbaik dihasilkan oleh zeolit termodifikasi Zn dengan nilai 38,22%, selanjutnya diikuti oleh zeolit termodifikasi Ni dan zeolit alam dengan nilai 33,96% dan 27,87%.Kata kunci: anaerobic digestion; biogas; metana; palm oil mill effluent; zeolit