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All Journal Eksergi: Chemical Engineering Journal Equilibrium Journal of Chemical Engineering COVIT Jurnal Teknologi Kimia Mineral
Maria Assumpta Nogo Ole
Politeknik Negeri Ujung Pandang
Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Education Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Medicine & Pharmacology Public Health Social Sciences

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Kajian Isoterm Adsorpsi Linear Alkilbenzena Sulfonate (LAS) dalam Limbah Cair Detergen Menggunakan Biosorben Ampas Kopi dan Ampas Kelapa Mimin Septiani; Zakiyah Darajat; Muhammad Arham Yunus; Maria Assumpta Nogo Ole; Zuhrotul Fikri Ilma
Eksergi Vol 20, No 2 (2023)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v20i2.9955

Abstract

One of the efforts to minimize the impact of detergent waste pollution is by adsorption using coffee dregs and coconut dregs adsorbents. The purpose of this study was to determine the optimum mass of coffee grounds and coconut pulp as adsorbents, to compare the effectiveness of their absorption in decreasing levels of Linear Alkyl Benzene Sulfonate, and to study their adsorption isotherm models. This research was conducted in batches with variations in the mass of each adsorbent, namely 1 gram, 2 grams, 3 grams, 4 grams and 5 grams. This research was conducted in batches with variations in the mass of each adsorbent, namely 1 gram, 2 grams, 3 grams, 4 grams and 5 grams. The detergent waste samples were contacted with the adsorbent for 30 minutes and then the absorption capacity was tested using the Methylene Blue test method. The results showed that the optimum absorption of LAS content from coffee grounds and coconut pulp adsorbents occurred at a mass of 2 grams with the greatest increase in absorption efficiency index Coconut dregs adsorbent is more effective than coffee dregs because it can absorb up to 37%, while coffee dregs are only 10% with the same adsorbent mass of 5 grams. The adsorption isotherm model of the 2 types of adsorbents refers to the Langmuir equilibrium with R2 values for coffee grounds 0.8651 and coconut pulp 0.9868.
Pemanfaatan Ekstrak Belimbing Wuluh (Avverhoa bilimbi L.) Menjadi Sabun Cuci Piring Zakiyah Darajat; Dian Ranggina; Harun Pampang; Afriyanti S. Lamuru; Muhammad Arham Yunus; Maria Assumpta Nogo Ole; Nurfiansyah Nurfiansyah
COVIT (Community Service of Tambusai) Vol. 2 No. 2 (2022): SEPTEMBER 2022
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/covit.v2i2.18389

Abstract

Wuluh star fruit is a plant that is rich in benefits. The population of this plant is very abundant in the community both in the yard or as a shade plant in the yard. The population of this plant is not proportional to its utilization so that the star fruit usually falls and rots. Seeing this, a community service activity was carried out regarding the use of starfruit into dish soap, which besides being able to add to the economic value of starfruit, can also reduce environmental pollution. Wuluh star fruit (Averrhoa bilimbi L.) contains saponins, flavonoids, acetic acid, and vitamin C. Saponins have the ability to kill bacteria while flavonoids can destroy bacterial proteins by lysis method so that bacteria cannot reproduce and die. Saponins also function as a foam producer so that they can be used in the manufacture of dish soap. Keywords: Wuluh star fruit, saponin, dish soap
BIODEGRADASI XYLENE DARI LAHAN TERCEMAR MINYAK BUMI OLEH BAKTERI RHODOCOCCUS ERYTHROPOLIS Ole, Maria Assumpta Nogo; Juliastuti, Sri Rachmania
JURNAL TEKNOLOGI KIMIA MINERAL Vol 2 No 1 (2023): JURNAL TEKNOLOGI KIMIA MINERAL
Publisher : Unit Penelitian dan Pengabdian Kepada Masyarakat Politeknik ATI Makassaar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (475.887 KB) | DOI: 10.61844/jtkm.v2i1.455

Abstract

Peningkatan eksploitasi minyak bumi merupakan sumber utama pencemaran tanah dan air. Tanah yang tercemar hidrokarbon pada dasarnya telah mengandung mikroorganisme yang dapat memecah hidrokarbon. Akan tetapi proses biodegradasi hidrokarbon dengan metode in situ mengalami hambatan karena lahan tercemar yang luas dan kebutuhan nutrien yang tidak terpenuhi. Oleh sebab itu maka dikembangkan metode ex situ dengan memindahkan tanah tercemar ke laboratorium untuk diolah dengan metode slurry bioreaktor. Mikroorganisme yang digunakan dalam proses ini adalah bakteri aerob Rhodococcus erythropolis yang mampu menguraikan alkilbenzena, seperti o-xylena, toluene dan etilbenzena pada temperatur 25oC – 37oC. Proses degradasi dilakukan pada 3 bioreaktor berpengaduk untuk konsentrasi baktri 12,5%, 15,0% dan 17,5%. Monitoring populasi bakteri dilakukan setiap 2 hari untuk mengetahui fase hidup mikroorganisme. Analisis hidrokarbon dilakukan setiap 14 hari selama 8 minggu dengan metode gas chromatography (GC). Bioreaktor 17,5% Rhodococcus erythropolis memberikan persen degradasi paling baik yaitu 96,83%.
Application of Subcritical Water Hydrolysis (SCW) in Producing Reducing Sugar for Biofuel Production Dian Ranggina; Maria Assumpta Nogo Olea; Hanny F. Sangian; Arief Widjaja; Hijrah Amaliah Azis
Equilibrium Journal of Chemical Engineering Vol 8, No 2 (2024): Volume 8, No 2 December 2024--Online First
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v8i2.86196

Abstract

Abstract. This work aimed to produce reducing sugar from coconut husk using subcritical water hydrolysis. Coconut husk contains cellulose and hemicellulose that can be converted into reducing sugars and then fermented into biofuel. In this study, the subcritical water hydrolysis was carried out in a batch reactor at  temperatures 120-260 oC and pressures, 40, 80, and 160 bar for 1 h. Subcritical water method obtained two products, namely (a) liquid containing sugar and (b) solid containing cellulose, hemicellulose and lignin. The liquid sugars were analyzed by HPLC and DNS, while crystal structure was characterized by XRD and SEM. The highest yield of reducing sugar obtained was 0.25 g/g cellulose+ hemicellulose at 150 oC and 80 bar.Keywords: Biofuel, Coconut husk, Lignocellulose, Reducing sugar, Subcritical water
Co-Authors Afriyanti S. Lamuru Arief Widjaja Dian Ranggina Hanny F. Sangian Harun Pampang Hijrah Amaliah Azis Nurfiansyah Nurfiansyah Septiani, Mimin Sri Rachmania Juliastuti, Sri Rachmania Yunus, Muhammad Arham Zakiyah Darajat Zakiyah Darajat Zuhrotul Fikri Ilma