JoASCE (Journal Applied of Science and Chemical Engineering)

Optimization of Ammonia (NH3) and Rice Husk Liquid Smoke Against Latex Precoagulation and Coagulation Time

dewi ermaya, Dian Ayu Afifah, Devy Cendekia, Vida Elsyana, Mustika Meri Diana — Fri, 29 Dec 2023 00:00:00 +0000

This study aims to determine the effect of variations in the concentration of ammonia as an anticoagulant agent and rice husk liquid smoke which is optimal as a coagulant agent in latex. This research consists of 2 observations. The first observation was made by adding variations in the concentration of ammonia to the liquid latex sample and observing the precoagulation time. In the first observation sample, ammonia was added at a concentration of 2%, 2.5%, and 3% respectively and then observed. The two latex observation samples that had been added with ammonia with an ammonia concentration of 2%, 2.5% and 3% were then added with liquid smoke with a volume of 2 mL, 4 mL, and 6 mL. The first observation results obtained showed that the concentration of ammonia used as an anti-coagulant agent 2% was able to prevent coagulation for 10.1 hours, 2.5% ammonia concentration for 12.0 hours, and 3% concentration for 13.0 hours. Whereas in the second observation to determine the optimal value of the ammonia concentration and liquid smoke volume used to get the optimal ammonia concentration and liquid smoke volume. The results obtained based on the results of the Response Surface Methode analysis, the optimum ammonia concentration that is good to use is 2% and a volume of 4.87 mL of liquid smoke with a coagulant retention time of 2.07 hours. The results of the second observation validation showed that the ammonia concentration and volume of liquid smoke suggested by the software resulted in a coagulant retention time of 2.05 hours.

a Model Isoterm Adsorpsi Langmuir Pada Analisis Daya Serap Iodium

Devy Cendekia, Dian Ayu Afifah — Fri, 29 Dec 2023 00:00:00 +0000

Iodine absorption analysis is used as an analysis in determining the quality of the adsorbent before its application. This analysis is able to identify the maximum amount of adsorbate that can be bound by an adsorbent. In addition, data analysis of iodine absorption can also explain the mechanism of the adsorption process that takes place in an adsorbate through the adsorption isotherm model. So that it can be used as an initial analysis in the manufacture of synthetic adsorption media. In this study, it was found that the absorption value of iodine in the adsorbent increased with lower iodine concentrations. The lowest iodine concentration of 0.025 N can be absorbed the most with a value of 81%. Iodine absorption analysis data obtained is then represented through the Langmuir isotherm model. Based on experimental data the correlation coefficient (R2) in the Langmuir isotherm model has a value of R2 = 0.945. So this model can be used to explain the adsorption mechanism in the analysis of iodine absorption. Through this adsorption model, it can be seen the adsorption mechanism that takes place and the maximum capacity of the adsorbate that is adsorbed. Based on the Langmuir isotherm model, analysis of iodine absorption through the monolayer absorption mechanism. The adsorption mechanism that occurs is the adsorption rate which is proportional to the fraction of empty sites present on the carbon along with the concentration of iodine in the solution. Iodine can be adsorbed to a maximum of 0.58 mg g-1. In other words, the Langmuir adsorption isotherm model can be used in the analysis of iodine uptake as a model that explains the maximum amount of bound adsorbate and the adsorption mechanism that takes place during the analysis.

Pengaruh Limbah Batang Pisang (Musa Paradisiaca) Dan Jerami Padi (Oryza Sativa L.) Terhadap Produksi Biogas

Adityas, Salomo Pranata Aji, Shintawati, Aan Hargiawan, M. Julian Herlambang — Fri, 29 Dec 2023 00:00:00 +0000

Biogas is a natural gas consisting mainly of gas metane (CH4) and carbon dioxide (CO2) produced from the anaerobic (without oxygen) fermentation of organic matter by methanogenic microorganisms. This process occurs in the biogas digester as a place for reactions by microorganisms to occur. The aim of this research is to increase household scale biogas production. The method used was a 2x2 Factorial Randomized Block Design (RBD) with 3 replications. The procedure in this study used chopped rice straw and banana stems and then put them into the digester and calculated the volume of gas formed using balloon media. The addition of 50 grams of rice straw with 100 grams of banana stems produced biogas with an average volume of 1531.24 mm3. The addition of 100 grams of rice straw and 100 grams of banana stems average volume of 2143.15 mm3. The addition of 200 grams of rice straw and 50 grams of banana stems has an average volume of 1170.28 mm3. The addition of 200 grams of rice straw and 100 grams of banana stems has a volume of 808.28 mm3. Control of biogas containing 500 grams of livestock manure with the addition of 500 ml of water has a volume of 852.95 mm3. In accordance with observations for 7 days, the best results were the addition of 100 grams of rice straw and 100 grams of banana stems for 3 repetitions with an average volume of 2143.15 mm3.

Pengaruh Waktu Ekstraksi dan Rasio Pelarut Terhadap Perolehan Minyak Biji Pala Menggunakan Metode Hidrodistilasi

Fri, 29 Dec 2023 00:00:00 +0000

The Moluccas-native tree that produces nutmeg seeds is very valuable for Indonesia's manufacturing of essential oils. The pharmaceutical and perfumery industries both make extensive use of the essential oil (EO), which has colorless or light yellow and utilized as a natural food flavoring and has a number of components that the oleochemical industry finds interesting. The myristin concentration of nutmeg oil obtained through industrial collection is one of the quality indicators since myristicin helps give nutmeg its very fragrant aroma. The hydrodistillation frequently used to produce nutmeg oil. Distillation yield and product quality are influenced by the parameters of the source material to be extracted. 50 g of nutmeg was placed in a 1 L boiling flask and given distilled water with a ratio of raw material and volume of 1:10, 1:15 and 1:20., respectively. Hydrodistillation was carried out at 100°C with variations in hydrodistillation duration of 1, 2, 3 and 4 h. Physicochemical analysis of nutmeg essential oil was conducted in accordance with SNI (Standard Nasional Indonesia) 06-2388-2006. Composition of nutmeg seed oil using GC-MS. Among the 21 compounds investigated, 13 were monoterpenes and 8 were oxygenated compounds (monoterpenols and oxygenated phenylpropanoid-derived compounds)

Rasio Limbah Jerami Padi (Oryza Sativa L.) dan Mikroorganisme Lokal (MOL) Dalam Produksi Pupuk Organik Cair

Adityas, Salomo Pranata Aji, Shintawati, Aan Hargiawan — Fri, 29 Dec 2023 00:00:00 +0000

Rice plants are monocot plants that grow in tropical areas. Rice plants that are ready to harvest will have their grains removed, while the stems and leaves will be discarded. The aim of this research is to determine the ratio of rice straw and local microorganisms to rice growth through fermentation and sedimentation processes with the resulting liquid product being used as liquid organic fertilizer. The research was conducted using a factorial randomized block design with a 2 x 2 factorial pattern with 3 replications. The first factor is 50 grams of rice straw which consists of 1 level, namely with the addition of 200 ml and 400 ml MOL. The second factor is 100 gram rice straw which consists of 1 level with the addition of 200 ml and 400 ml MOL. The observation observed was the height of the rice plants after being given the liquid organic fertilizer composition for 7 days. The research results of several variations on the height of rice plants on the last day, including