scholarly journals Recent Strategy of Biodiesel Production from Waste Cooking Oil and Process Influencing Parameters: A Review

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
A. Gnanaprakasam ◽  
V. M. Sivakumar ◽  
A. Surendhar ◽  
M. Thirumarimurugan ◽  
T. Kannadasan

Cost of biodiesel produced from virgin vegetable oil through transesterification is higher than that of fossil fuel, because of high raw material cost. To minimize the biofuel cost, in recent days waste cooking oil was used as feedstock. Catalysts used in this process are usually acids, base, and lipase. Since lipase catalysts are much expensive, the usage of lipase in biodiesel production is limited. In most cases, NaOH is used as alkaline catalyst, because of its low cost and higher reaction rate. In the case of waste cooking oil containing high percentage of free fatty acid, alkaline catalyst reacts with free fatty acid and forms soap by saponification reaction. Also, it reduces the biodiesel conversions. In order to reduce the level of fatty acid content, waste cooking oil is pretreated with acid catalyst to undergo esterification reaction, which also requires high operating conditions. In this review paper, various parameters influencing the process of biofuel production such as reaction rate, catalyst concentration, temperature, stirrer speed, catalyst type, alcohol used, alcohol to oil ratio, free fatty acid content, and water content have been summarized.

2012 ◽  
Vol 1 (3) ◽  
pp. 147
Author(s):  
Nita Noriko ◽  
Dewi Elfidasari ◽  
Analekta Tiara Perdana ◽  
Ninditasya Wulandari ◽  
Widhi Wijayanti

<p style="text-align: justify;">Masyarakat Indonesia memiliki ketergantungan terhadap minyak goreng. Berdasarkan hal tersebut, perlu dilakukan penelitian tentang penggunaan dan mutu minyak goreng yang beredar di masyarakat khususnya pada <em>food court</em> Universitas Al Azhar Indonesia. Analisis penggunaan minyak goreng penjaja makanan dilakukan dengan melakukan survey. Untuk mengetahui kualitas minyak goreng, dilakukan analisis laboratorium yang meliputi pengukuran kadar air, kadar asam lemak bebas, dan bilangan Iod. Dari dua belas kantin, ada sembilan kantin yang menggunakan minyak goreng. Hasil analisis penggunaan minyak goreng, penjaja makanan secara konsisten  34% menggunakan minyak goreng bermerek dagang A. Pemilihan minyak berdasarkan warna dilakukan oleh 45% penjaja makanan. Berdasarkan frekuensi pembelian, 56% penjaja makanan membeli minyak per hari. Selain itu, 45% penjaja makanan menggunakan minyak dua kali pakai. Analisis kebutuhan minyak menunjukkan, 34% penjaja makanan menghabiskan 5 liter minyak per hari. Cara pembuangan minyak yang dilakukan oleh penjaja, 78% membuang minyaknya setelah digunakan, dimana 67% penjaja makanan membuangnya ke tempat sampah. Berdasarkan pengukuran kadar air, kadar asam lemak bebas, dan bilangan Iod menunjukkan bahwa minyak goreng yang digunakan belum memenuhi standar syarat mutu, walaupun kadar air yang masih di dalam ambang batas normal yaitu kurang dari 0,30%, namun kadar asam lemak bebas baik sebelum maupun sesudah penggunaan melebihi ambang batas normal yang didukung oleh hasil pengukuran bilangan Iod.</p><h6 style="text-align: center;"><strong>Abstract</strong></h6><p style="text-align: justify;">Indonesian society has dependence of cooking oil. Based on this condition, the analysis of cooking oil utilization and quality requirement at UAI food court is necessary and it was done. The analysis of cooking oil utilization was done by doing some survey. In order to search the quality of cooking oil, laboratory analysis was done that consist of water content, free fatty acid content, and Iod number. There are nine canteens from twelve canteens which utilize cooking oil. The result of cooking oil utilization analysis shows that 34% of merchant is utilizing A trade mark cooking oil, 45% is identifying cooking oil based on color. 56% is buying cooking oil per day, 45% is utilizing the cooking oil twice, 34% is spending 5 liters cooking oil per day, 78% is casting the cooking oil after utilize it, and 67% is casting the cooking oil into trash can. Based on the result of water content, free fatty acid content, and Iod number analysis showed that cooking oil is never fulfill normal limit, although the water content is still in proper limit is less than 0,30%, whereas free fatty acid content before or after analysis are very high and do not in proper limit and it is supported by Iod number measurement result.</p>


2021 ◽  
Vol 146 ◽  
pp. 105984 ◽  
Author(s):  
Swapnil Sukhadeo Bargole ◽  
Prakash Kumar Singh ◽  
Suja George ◽  
Virendra Kumar Saharan

2018 ◽  
Vol 1 (1) ◽  
pp. 16 ◽  
Author(s):  
Hadrah Hadrah ◽  
Monik Kasman ◽  
Fitria Mayang Sari

Waste cooking oil is used oil that has been used for domestic purposes and has undergone changes, both physically and chemically. One effort that can be done to reduce the adverse effects of used cooking oil is changed the material used cooking oil into biodiesel. In this study of biodiesel production from waste cooking oil is done by using biodiesel transesterification reaction as generally through a pretreatment in order to reduce the number of Free Fatty Acid in cooking oil. The high number of Free Fatty Acid will complicate the separation of glycerol from biodiesel so that production of biodiesel will be slight. Test parameters of biodiesel quality produced by  transesterification process refers to the Indonesian biodiesel quality standard ISO 7182: 2015. The production of biodiesel from used cooking oil in this experiment using variations methanol and sodium hydroxide solution ratio to the used cooking oil is 1: 2; 1: 4 and 1: 8. Test results showed that the quality of biodiesel is in compliance with ISO 7182: 2015 on the parameters of viscosity, density and flame test. While the Free Fatty Acids remained above the quality standard ISO 7182: 2015.Keywords :    Waste cooking oil, Transesterification, Biodiesel


Sign in / Sign up

Export Citation Format

Share Document