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All Journal Konversi Indonesia Chimica Acta INTEK: Jurnal Penelitian
Widiyanti, Setyo Erna
Teknik Kimia, Politeknik Negeri Ujung Pandang, Jl. Perintis Kemerdekaan KM. 10 Tamalanrea, Makassar, 90245, Indonesia
Chemical Engineering, Chemistry & Bioengineering Education

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OPTIMIZATION OF THE ALUMINUM SULFATE AND PAC (POLY ALUMINUM CHLORIDE) COAGULANT ON TELLO RIVER WATER TREATMENT Widiyanti, Setyo Erna
Konversi Vol 7, No 1 (2018): ARTICLE IN PRESS
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v7i1.4843

Abstract

Abstract- Tello River water used by PT. PLN SULTANBATARA for sanitation and process water. One of the processs water is boiler feed water. River water has fluctuative characteristics depending on the season that occurs such as turbidity and Total Suspended Solid (TSS). The presence of TSS in boiler feed water needs to be minimized as it can decrease boiler performance in generating heat. The concentration of TSS in river water can be removed by coagulation and flocculation method with the addition of coagulant. Excessive coagulant distribution will increase the concentration of dissolved solids (TDS) of water. Thus, it is necessary to determine the optimum concentration of coagulant based on initial TSS concentration of river water. The objective of this research is to determine the optimum concentration of Aluminum Sulfate (Al2(SO4)3) and PAC (Poly Aluminum Chloride) Coagulant in reducing TSS water of Tello River. The sample used in this research is Tello river water which has an initial TSS concentration of 150 mg/L. The coagulant used was Aluminum Sulfate and PAC with several concentration variation of 5% - 40% to the initial TSS concentration of river water. Analysis of TSS content of samples using Gravimetry method. The optimum concentration of coagulant Aluminum Sulfate and PAC was 35% and 25% to the initial TSS concentration of river water where the final concentration of TSS obtained was 20 mg/L and 15.5 mg/L with percent TSS removal of 86.67% and 89.6 %. Keywords:      Total Suspended Solid, Coagulation, Aluminium Sulfate, Poly Aluminium Chloride (PAC)
OPTIMIZATION OF THE ALUMINUM SULFATE AND PAC (POLY ALUMINUM CHLORIDE) COAGULANT ON TELLO RIVER WATER TREATMENT Setyo Erna Widiyanti
Konversi Vol 7, No 1 (2018): April 2018
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v7i1.4843

Abstract

Abstract- Tello River water used by PT. PLN SULTANBATARA for sanitation and process water. One of the process's water is boiler feed water. River water has fluctuative characteristics depending on the season that occurs such as turbidity and Total Suspended Solid (TSS). The presence of TSS in boiler feed water needs to be minimized as it can decrease boiler performance in generating heat. The concentration of TSS in river water can be removed by coagulation and flocculation method with the addition of coagulant. Excessive coagulant distribution will increase the concentration of dissolved solids (TDS) of water. Thus, it is necessary to determine the optimum concentration of coagulant based on initial TSS concentration of river water. The objective of this research is to determine the optimum concentration of Aluminum Sulfate (Al2(SO4)3) and PAC (Poly Aluminum Chloride) Coagulant in reducing TSS water of Tello River. The sample used in this research is Tello river water which has an initial TSS concentration of 150 mg/L. The coagulant used was Aluminum Sulfate and PAC with several concentration variation of 5% - 40% to the initial TSS concentration of river water. Analysis of TSS content of samples using Gravimetry method. The optimum concentration of coagulant Aluminum Sulfate and PAC was 35% and 25% to the initial TSS concentration of river water where the final concentration of TSS obtained was 20 mg/L and 15.5 mg/L with percent TSS removal of 86.67% and 89.6 %. Keywords:      Total Suspended Solid, Coagulation, Aluminium Sulfate, Poly Aluminium Chloride (PAC)
OPTIMASI PROSES KOAGULASI MENGGUNAKAN CAMPURAN KOAGULAN ALUMINIUM SULFAT DAN POLY ALUMINIUM CHLORIDE (1:1) PADA PENGOLAHAN AIR SUNGAI TELLO Setyo Erna Widiyanti; Pabbenteng Pabbenteng; Eko Wardana Saputra; Andi Nurul Islamiati
Konversi Vol 8, No 1 (2019): April 2019
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v8i1.6515

Abstract

Abstrak- Koloid dan padatan total tersuspensi (TSS) dalam air dapat dihilangkan dengan proses koagulasi dan flokulasi. Konsentrasi koagulan dan pH merupakan dua parameter terpenting dalam keberhasilan proses koagulasi dan flokulasi. Tujuan dari penelitian ini adalah optimasi pH proses koagulasi dan flokulasi menggunakan campuran koagulan Alum dan PAC (1:1) untuk menghilangkan TSS air sungai Tello. Sampel yang digunakan dari penelitian ini adalah Air Sungai Tello yang memiliki konsentrasi TSS awal 195 mg/L. Konsentrasi campuran koagulan Alum dan PAC (1:1) yang digunakan sebesar 25% dari konsentrasi TSS awal sampel. Kondisi proses koagulasi dan flokulasi yang digunakan adalah pengadukan cepat (koagulasi) dengan kecepatan pengadukan 350 rpm selama 1 menit, pengadukan lambat (flokulasi) dengan kecepatan pengadukan 50 rpm selama 20 menit, dan pengendapan selama 30 menit. Proses koagulasi dan flokulasi dilakukan pada kisaran pH 4-10 dan konsentrasi TSS dianalisa menggunakan metode Gravimetri. pH proses koagulasi dan flokulasi dan persen (%) removal TSS optimal pada pH 6 dengan persen (%) removal TSS sebesar 98,20%. Kata kunci: Alum, Koagulasi, PAC, pH, TSS 
SYNTHESIS AND CHARACTERIZATION OF GOLD NANOPARTICLES USING TEAK LEAF EXTRACT Tectona grandis Muhammad Yasser; Setyo Erna Widiyanti; Abdur Rahman Arif
Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta) Volume 10, No.1: June 2017
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/ica.v10i1.6408

Abstract

Teak leaf extract has been successfully used in the synthesis of gold nanoparticles. It is characterized by a color change of the solution from yellow to red wine after the addition of teak leaf extract to HAuCl4 and the resulting wavelengths in the range of 500-600 nm that indicates that gold nanoparticles have been formed. Growth and stability of the gold nanoparticles produced using UV-Vis Spectroscopy. During observation during 144 hours the stability of gold nanoparticles after 48 hours with a wavelength of about 567.5 -568 nm. 
Pengaruh Waktu terhadap Kestabilan Nanopartikel Emas yang Disintesis Menggunakan Ekstrak Air Daun Jati (Tectona Grandis) Termodifikasi Mercaptopropionic Acid (MPA) M Yasser; Setyo Erna Widiyanti
INTEK: Jurnal Penelitian Vol 6, No 1 (2019): April 2019
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (50.592 KB) | DOI: 10.31963/intek.v6i1.1123

Abstract

Gold nanoparticles were synthesized using teak leaf water extract modified with Mercaptopropionic Acid (MPA). The observations for 6 days using UV-Vis spectroscopy, obtained stable gold nanoparticles which were characterized by the maximum wavelength absorption produced in the range of 538.5 nm - 541 nm.
Studi Kinetika Konsumsi Glukosa oleh Aspergillus Niger dalam Produksi Bioethanol dari Lignoselulosa Setyo Erna Widiyanti
INTEK: Jurnal Penelitian Vol 4, No 1 (2017): April 2017
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (921.5 KB) | DOI: 10.31963/intek.v4i1.98

Abstract

Global warming resulted from CO2 level increase in the atmosphere has caused elevation of earth temperature and uncertain climate changes. To prevent the rise of CO2 in the atmosphere can be done by using biomass fuel such as bioethanol. The raw materials of bioethanol can be derived from oil palm empty fruit bunch. Enzymatic hydrolysis utilizes cellulase-producing fungus and in this research, Aspergillus niger was chosen. The glucose produced is consumed by A niger as carbon source and this is undesirable, therefore it should be minimized as low as possible. Knowing the rate of glucose consumption is important to have a model of the hydrolysis reaction rate which will be helpful in the design process on an industrial scale hydrolysis reactor. This study aimed to determine the equations that can be used to approximate the growth rate of A. niger, glucose consumption, the formation of citric acid, and the kinetic parameters used to modeling the kinetics of glucose consumption by A. niger. Kinetics of glucose consumption by A. niger was studied in batch system with variation of initial glucose concentration of 30, 50, 70 g/l. The growth rate of A. niger, glucose consumption, and the formation of citric acid were modeled using 3 equations; i.e. Monod with non-competitive product inhibition, Luedeking-Piret, and Luedeking-Piret growth associated product formation, respectively. The values of kinetic parameters such as μmax, Ks, Kp, were 0.65 hour-1, 157.5 g/l, 0.3 g/l, for initial glucose concentration of 30, 50, 70 g/l, respectively. The values of α (kinetic parameter for growth associated product formation and α would be equal to Yp/x) and Yx/s were 0.4903, 0.8531, 0.9863; 0.5124, 0.2704, 0.2381, for initial glucose concentration of 30, 50, 70 g/l, respectively. Higher initial glucose concentration would increase α but it lowered Yx/s.
Co-Authors Abdur Rahman Arif Andi Nurul Islamiati Eko Wardana Saputra M. Yasser Pabbenteng, Pabbenteng