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All Journal Reaktor Jurnal Serambi Engineering Jurnal Teknik Kimia USU
Amir Husin
Universitas Sumatera Utara
Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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PRODUKSI BIOHIDROGEN DARI HIDROLISAT AMPAS TAHU SECARA FERMENTASI ANAEROB MENGGUNAKAN KULTUR CAMPURAN Amir Husin; Sarto Sarto; Siti Syamsiah; Imam Prasetyo
Reaktor Volume 15, No.2, OKTOBER 2014
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (599.85 KB) | DOI: 10.14710/reaktor.15.2.87-96

Abstract

Ampas tahu merupakan produk samping industri pengolahan tahu berbahan dasar kacang kedelai (Glysine max.).  Dalam studi ini, ampas tahu yang telah mengalami perlakuan-awal dengan metode yang berbeda dikonversi menjadi hidrogen menggunakan kultur campuran.  Pengaruh perlakuan-awal asam satu-tahap (0,5% dan 10% berat HCl) dan dua-tahap (tahap I 0,5%  dan tahap II 10% berat HCl) terhadap sakarifikasi ampas tahu juga diinvestigasi.  Lebih lanjut, pengaruh perlakuan awal asam satu-tahap maupun dua-tahap terhadap produksi hidrogen dan efisiensi degradasi gula tereduksi dibandingkan.  Yield total gula-tereduksi 503,73 mg/g ampas tahu diperoleh dari perlakuan-awal asam dua-tahap.  Nilai ini kurang lebih 4 kali lebih tinggi dibanding hasil dari perlakuan-awal asam satu-tahap menggunakan 0,5% berat HCl. Studi produksi biohidrogen dilakukan secara batch menggunakan kultur campuran dengan kondisi reaksi  35oC dan pH awal 6,5,  Hasil percobaan menunjukkan, bahwa yield hidrogen kumulatif  maksimum 0,928  mmol/g  ampas tahu diperoleh dari perlakuan  asam dua-tahap  atau meningkat 1,8 kali dibanding perlakuan satu-tahap menggunakan 0,5% berat HCl. Key words : ampas tahu,  perlakuan asam, produksi hidrogen Abstract Tofu solid waste is one of the by-products of tofu-processing industry.  In this study, batch experiments were carried out to convert tofu solid waste pretreated by different methods into hydrogen using mixed culture.  The effects of one-stage (0.5% or 10% HCl) and two-stage (first stage 0.5% HCl) and second stage 10% HCl) pretreatments on the saccharification of tofu solid waste were also studied.  Furthermore, the effects of  and/or  two- stages acid pretreatments on hydrogen production and degradation efficiencies the reducing-sugar (RS) were compared.  A maximum total RS yield of 503.73 mg/g-tofu solid waste was obtained from substrate pretreated with two-stages method.  It was approximately 4-fold greater than that from substrate pretreated with one-stage method using 0.5% wt HCl. At the reaction condition of 35oC, initial pH =  6.5, and RS concentration based on 2 grams of tofu solid waste pretreated, a maximum cumulative hydrogen yield was 0.928  mmol/g-tofu solid waste from substrate  pretreated  with  two-stages method.  It was approximately 1.8-fold greater than that from substrate pretreated with one-stage method using 0.5% wt HCl. The results show that two-stage acid preteatment can enhancing the amount of  reducing sugar in the mixture and hydrogen yield from tofu solid wastes. 
Studi Adsorpsi Furfural Menggunakan Karbon Aktif dari Kulit Durian Termodifikasi Philip Dohan Rea Sitinjak; Amir Husin
Jurnal Teknik Kimia USU Vol. 10 No. 1 (2021): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (197.736 KB) | DOI: 10.32734/jtk.v10i1.3624

Abstract

Furfural is an aromatic aldehyde, classified as hazardous material that cause environmental impact, especially harmful for humans if consumed. Furfural removal in water is necessary to overcome the negative impact. Furfural removal can be carried out using adsorption of activated carbon from durian shell. This study determines contact time and reaction kinetic using modified activated carbon which carried out in 7 stages: preparation of furfural main solution 1000 ppm, furfural work solution, determining furfural standard curve, adsorption time, best mass and adsorption capacity of activated carbon, isotherm adsorption and kinetics. The parameters measured are contact time, capacity, furfural adsorption kinetics. Filtrate testing is carried out using UV-Spectrophotometry. Results that obtained in this study are best contact time at 75 minutes with reaction order; reaction contant (k); linear regression (R2) are 1.5; 3.966 × 10-5 (mg/g)/s; 0.9451 respectively. The isotherm adsorption model is Langmuir Isotherm.  
Studi Pengaruh Variasi Konsentrasi Asam Posfat (H3PO4) dan Waktu Perendaman Karbon terhadap Karakteristik Karbon Aktif dari Kulit Durian Amir Husin; Asmiah Hasibuan
Jurnal Teknik Kimia USU Vol. 9 No. 2 (2020): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (380.096 KB) | DOI: 10.32734/jtk.v9i2.3728

Abstract

Durian shell is one of the agricultural wastes has the potency to valuable product  therefore this study aims to utilize durian shells in activated carbon production and examine effect of variations phosphoric acid (H3PO4) concentration and carbon soaking time to characteristics of activated carbon. Durian shell pyrolyzed at 400oC for 2 hours, milled using ball mill, sifted with a 100 mesh sieve, and carbon is activated with soaking using phosphoric acid (H3PO4) with various concentrations of 30, 40, 50, 60 and 70% (v/v) and soaking time of 3 hours, 6 hours, 9 hours, 12 hours, and 15 hours. Effect of variation concentration and soaking time shows the characterization of activated carbon are fluctuating. Activated carbon with the highest iodine number of 1,080,1728 mg/g obtains at activator concentration 30% (v/v) for 9 hours. Results of the SEM-EDX analysis of activated carbon show that mesoporous group, BET analysis shows ​​44,372 m2/g of surface area.
Reduction of TSS, COD, Oil and Fat in Palm Oil Mill Waste Using Dissolved Air Flotation Method Florida Agustina Sinaga; M. Turmuzi Lubis; Amir Husin
Jurnal Serambi Engineering Vol 7, No 4 (2022): Oktober 2022
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v7i4.5103

Abstract

This study aims to determine the effect of variations in pressure and contact time of wastewater with air to decrease the parameters of TSS, COD, and oils and fats contained in palm oil wastewater. This study uses a series of Dissolved Air Flotation (DAF) process units with the addition of Poly Aluminum Chloride (PAC) coagulant. This research begins with the manufacture of a series of DAF tanks and flotation tanks. Waste flow is carried out in batches and the air is flowed upflow through the bottom hole of the DAF tank. The pressure variables used in decreasing the parameters of TSS, COD, and oil and fat are absolute 2; absolute 2.5; and absolute 3 atm. The contact time variables for decreasing TSS, COD, and oil and fat parameters were 15, 30, 45, 60, and 75 minutes. The results showed a decrease in each of the tested parameters. The effective pressure to reduce the value of the TSS parameter is the absolute pressure of 3 atm and the absolute pressure of oil and grease is 2.5 atm. While the effective pressure to reduce the value of the COD parameter is an absolute pressure of 3 atm. The best contact time between air and wastewater to set aside the values of the TSS, COD, and oil-fat parameters was 75 minutes.
Analisis Produksi Biogas Terhadap Penambahan Kulit Singkong pada Variasi Campuran Limbah Cair Domestk dan Aquadest Eva Malini Simare mare; Maya Sarah; Amir Husin
Jurnal Teknik Kimia USU Vol. 11 No. 2 (2022): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v11i2.4997

Abstract

Domestic waste and agricultural food waste in the form of cassava peels have the potential as a source of raw material for making biogas. This research uses domestic waste from Wastewater Treatment Plant (WWTP) Cemara of Perusahaan Daerah Air Minum (PDAM) Tirtanadi, Sumatera Utara Province. The ratio of domestic waste inoculum from WWTP Cemara PDAM Tirtanadi and water in this study was 100:0, 70:30, 60:40, and 50:50 (v/v). Then, for each variation of the ratio, 3 kg of ground cassava peel was added. This study aims to determine the amount of biogas produced by measuring the pressure in a pipe connected to a bioreactor. The process of making biogas uses anaerobic fermentation with a batch system. The parameter tested in this study is the measurement of the Total Suspended Solid (TSS) value, Volatile Solid (VS) value, pH value, and total Chemical Oxygen Demand (COD) value. From the results of the research conducted, it was found that the variation in the ratio of 100:0 found biogas at a pressure of 205.8 Pa with TSS value of 1348 mg/L, VS value of 410 mg/L, pH value of 7.66 and COD value of 1088 mg/L.
Co-Authors Asmiah Hasibuan Eva Malini Simare mare Florida Agustina Sinaga Imam Prasetyo M. Turmuzi Lubis Maya Sarah Philip Dohan Rea Sitinjak Sarto Sarto Siti Syamsiah