jurnal ATMOSPHERE

ROSELLA INSTANT BEVERAGE PRODUCTION WITH CONTROL OF PRESERVATION AND OPERATING CONDITIONS

Nanik Astuti Rahman — 2023-12-27

Rosella, a plant previously known as a flower, is now one of the plants that is often used as an object of research. Apart from simplicia, rosella is produced as a drink that has health benefits. Rosella production includes tea, jelly candy, instant drinks, and syrup. Roselle syrup production is carried out using process engineering, namely temperature and heating time. The addition of sugar was also intended to see its effect on preserving the syrup. The sugar added is varied at 1; 1.25; and 1.5 kg. In the syrup-making process, citric acid is added to enhance the taste. In this research, the heating temperature was carried out at the boiling temperature, with the heating time varying between 10 minutes, 15 minutes, and 20 minutes. Heating is also carried out at a temperature of 85 °C with a heating time of 30, 40, and 50 minutes. Laboratory analysis of the product is vitamin C analysis. To test consumer acceptance of the product, a hedonic test is carried out, which includes tests on taste, color, and structure (viscosity). The results obtained by this research were a syrup product with the largest vitamin C content, namely 25,251 mg/100 g, at a heating variation of 85 °C with a heating time of 50 minutes. Optimal sugar addition at 1.25 kg

OPTIMIZATION OF ION EXCHANGE RESIN IN GROUNDWATER DEMINERALIZATION PROCESS

Ivan Nugraha — 2023-12-27

Air tanah memiliki karakteristik berbeda dengan kualitas air permukaan yang memiliki kandungan mineral cukup tinggi. Air demineral merupakan air yang kandungan mineralnya sudah hilang memiliki peranan penting dalam proses industri. Proses pengolahan air demineral dapat dilakukan dengan berbagai cara yaitu distilasi, reverse osmosis dan deionisasi. Pada proses deionisasi inilah proses pengolahan air menggunakan metode Ion Exchange. Metode yang digunakan pada penelitian ini adalah ion exchange. Resin yang digunakan untuk proses pembuatan air demineral yaitu resin kation MC-08 dan anion MA-12. Resin kation diaktivasi dengan menggunakan HCl dan resin anion diaktivasi menggunakan NaOH. Untuk mengetahui air tanah itu sudah berubah menjadi air demineral dilakukan pengukuran Total Dissolved Solid dan konduktivitas listrik sesuai dengan Standar Nasional Indonesia. Hasil penelitian menunjukkan nilai Total Dissolved Solids mencapai 0 ppm dan konduktivitas listrik 0 µS/cm pada variabel ketinggian resin 15 cm, debit air 2,5 liter per menit dan waktu operasi 35 menit.

GEL-BASED MULTINUTRIENT FERTILIZER FROM WASTE MONOCULTURE FERMENTATION PROCESS

Dio Ajeng Oktavian — 2023-12-27

Gel organic fertilizer is the result of liquid organic fertilizer that is converted from liquid to gel, which is produced naturally. This gel organic fertilizer is an additional material used to meet the nutrient needs of plants to increase better productivity. The source of gel organic fertilizer is not much different from liquid organic fertilizer. Where the material for making gel organic fertilizer can be obtained from agricultural residues, MSME industries, factory waste that has no selling value such as vegetable waste, cheese whey waste, and molasses. This study aims to determine the effect of variable thickening agents on gel fertilizer from various gel structure modifiers. The treatments are as follows: The fixed variable is the fermentation time of 14 days and the independent variable of gel structure modifiers including tapioca starch, Carbopol 94, and Aquakeeper Hydrogel. The results of this research show that the treatment of free variables has a very significant effect and gives the best results without involving auxiliary media such as heating.

EXTRACTION OF LEMON PEEL (Citrus Limon) WITH VARIATION OF INGREDIENTS AND POWER TREATMENTS USING THE MICROWAVE ASSISTED EXTRACTION (MAE) METHOD

Annisa Nur Oktari Cindiya — 2023-12-27

Lemon (Citrus limon (L.)) is one of the natural ingredients that can be utilized fruit and its skin contains a source of vitamin C, antioxidants, carbohydrates, potassium, folate, calcium, thiamin, niacin, vitamin B6, phosphorus, magnesium, and other compounds. This study aims to obtain limonene content and high yield. The components of orange peel oil consist of limonene (95%), mirsen (2%), noctanal (1%), pinece (0.4%), linanool (0.3%), sabiene (0.2%), geranial (0.1%), neral (0.1%, dodecanal (0.1%), others (0.5%). In this study, the method used was Microwave Assisted Extraction, using 2 factors with microwave power (100, 200, 300 and 399 watts) and material treatment (fresh, aerated, in the oven and under the sun). The best results in this study were obtained in the processing of materials dried by oven using a temperature of 45⁰C for 2 hours using the operating conditions of 399 W microwave power producing yellow oil, smelling very strong lemon, having a yield of 0.0936%, and limonene content of 34.512%.

REDUCING WOVEN FABRIC DEFECTS WITH DMAIC SIXSIGMA AT CV. PARADILA LAMONGAN

Gagok Setiawan — 2023-12-27

Efforts to reduce product defects on cloth fabrics in CV. Paradila Lamongan have been made but not maximized, resulting in the price can not be high so the profit is reduced. Through the inspection process at the end of production often found defects of the product which resulted in the price of bandage fabric falling because it did not meet consumer standards. Evaluation is required on each production line to obtain data on the cause of the defect of the cloth. The DMAIC Six Sigma method notes that there are three most common causes of defects: Lusi jump, Faulty feeding and Empty eating. Especially for the lusi jump has a presentation of 62.8% as the biggest cause of product defects. Datasheet recording in September 2023 reached 29 meters. With measure and analyze of DMAIC then made datas some improvement in solving problems is the most important improvement skill and knowledge of machine operators in running SOP and maintenance.