Biosorpsi Kromium (Cr) pada Limbah Cair Industri Elektroplating Menggunakan Biomassa Ragi Roti (Saccharomyces Cerevisiae)

Electroplating industry is one of industry that produce waste water containing heavy metals. Among the heavy metals contained in the waste water is Chromium (Cr) which have a high toxicity. One technology that can be applied to set aside Cr in wastewater is by biosorption method using biomass derived from baker\u27s yeast (Saccharomyces cerevisiae). This study aimed to study the ability of biomass yeast (Saccharomyces cerevisiae) in designated Cr in weight variation biosorbent is 0.25; 0.5 and 0.75 grams, 80 mesh size; 100 and 140 and the contact time 1; 2; 3 and 4 hours. The results showed the highest removal efficiency of Cr occurs in biosorbent weight of 0.75 grams in a size of 80 mesh and a contact time of 4 hours with an efficiency of 54.7%. Biosorption process showed that values adsorption capacity that is 3.3258 mg Cr / gr biosorbent

Fermentasi Kulit Nanas Menjadi Bioetanol Menggunakan Zymomonas Mobilis dengan Variasi Pemekatan Medium dan Waktu Fermentasi

The high dependence of fuel resource such as oil, coal, and gas will influence the depletion of fossil resources (oil, natural gas, and coal). Therefore, it is important to study conversion of pineapple peel to bioethanol as renewable energy to overcome dependence on fossil fuels. This research was conducted the fermentation of pineapple peel with concentrated medium variation to obtain high concentration of bioethanol. This work is aimed to study of bioethanol production from pineapple peel with concentrated medium variation with Zymomonas mobilis to increasing the concentration of the sugar inside the medium to obtain maximum conditions on producing bioethanol. Fermentation was conducted in 2 Liter fermentor with variations of fermentation time from 12 ; 24 ; 36 ; 48 ; 60 ; 72 until 84 hours respectively and concentratedmedium variation from 15% ; 20% ; 25% until 30%. respectively. The concentration of bioethanol was increased by increasing of concentrated medium variation. Maximum conditions of bioethanol production from pineapple peel were shown having 30%concentrated medium variation, and fermentation hours 60th about 8,79 % v/v

Produksi Bioetanol dari Sari Kulit Nenas Menggunakan Yeast Saccharomyces Cerevisiae dengan Variasi Penambahan Tween 80 dan Sumber Nitrogen

One material that has potential to be used as raw material for bioethanol is the pineapple peel. Pineapple peel from the pineapple is one of the biggest agricultural waste in Indonesia, particulary in the area of Riau. Pineapple peel can be used as raw material for bioethanol production because contain much fibers, carbohydrates and glucose. This study aimed to obtain the highest amount of bioethanol from fermented juice pineapple peel using the yeast Saccharomyces cerevisiae by varying the concentration of tween 80 and comparing the nitrogen sources such as peptone and yeast extract and fermentation time is 24, 48 , 72, 96, and 120 hours. Measurement of bioethanol content using alcoholmeter. From the research results, obtained the highest bioethanol content of 9% v/v or 71,04 mg/ml in the additions at 20 ml tween 80 and a nitrogen source such as peptone and the fermentation time 96 hours

Pembuatan Bioetanol dari Kulit Nanas (Ananas Comosus L.) Menggunakan Enzim Selulase dan Yeast Saccharomyces Cerevisiae dengan Proses Simultaneous Sacharificatian And Fermentation (SSF)

One of energy source alternative that can be used as a substitute for fossil fuel-based energy, is bioethanol. Bioethanol is biochemistry fluid from fermentation process of sugars from carbohydrate sources by using microorganisms. The raw material of bioethanol production is very diverse, like pineapple peel. Pineapple peel can be used as raw material for bioethanol production because contain of fiber, carbohydrates and sugar. This study aims to make bioethanol from pineapple peel with Sacharificatian Simultaneous and Fermentation (SSF) process with cellulase enzyme variation are 1%, 3%, 5%, 7%, and 10% v / v substrate and fermentation time are 2, 3, and 4 days. From the research is obtained the highest bioethanol concentration is 8% on the addition of cellulase enzymes 10% v / v substrate with 3 days fermentation time

Pengaruh Waktu Inokulasi Inokulum dalam Pembuatan Bioetanol dari Pelepah Sawit Menggunakan Saccharomyces Cerevisiae

Palm frond is one of the solid waste generated by the activities of oil palm plantations. Indonesia is one of the countries which has the wide land areas in the world. Palm frond is lignocellulosic compound that consist of lignin, celluose, and hemicelluloce. Therefore, palm fronds can be used as raw material to produce bioethanol, production of bioethanol from palm fronds can be done through the fermentation process. The microorganisms that used in this research was Saccharomyces cerevisiae. The purpose of this research was to determine the effect of inoculation time of Saccharomyces cerevisiae on fermentation process to produce bioethanol from palm fronds. Stages of the process that done in this research include delignification, purification powder palm frond, hydrolysis and fermentation. In the fermentation process, the inoculation inoculum's time varied for 12 hours, 24 hours, 36 hours and 48 hours. On acid hydrolysis, the result of sugar concentration maximum was 54.889 g/L. The optimum time of inoculum inoculation in this research was 24 hours and the optimum bioethanol gained from fermentation proces was 3% (v/v) for 3 days

Penyisihan Kromium (Cr) pada Limbah Cair Elektroplating Menggunakan Biomassa Ragi Roti (Saccharomyces Cerevisiae) yang Diimmobilisasi dengan Kalsium Alginat

Chromium (Cr) is a heavy metal that has a toxicity and the presence in waters caused by the disposal of wastewaste from various industrial activities, one of them is electroplating industry. One of method that can be applied to reduse the concentration of Cr in wastewater is biosorption using biomass of baker\u27s yeast (Saccharomyces cerevisiae) which immobilization with calcium alginate. This research aims to determine the ability of biomass of baker\u27s yeast (Saccharomyces cerevisiae) on variations concentration of sodium alginate (1%, 2% and 3%), weight biosorbent (0,5, 1, 1,5 and 2 grams) and contact time (1, 2, 3 and 4 hours). Concentration Cr wastewater was analyzed using AAS instrument. The results showed the Cr concentrations was highest at a concentration of 3% alginate, biosorbent weight of 0,5 gram and contact time of 3 hours with the adsorption capacity of 2,608 mg Cr /g biosorbent