Penelitian ini dilakukan untuk mengetahui gambaran umum stress dan dampaknya pada mahasiswa yang dilihat dari kejadian sehari-hari. Sampel dari penelitian ini adalah mahasiswa Fakultas Psikologi Universitas Indonesia. Sebanyak 67 mahasiswa psikologi berpartisipasi dengan cara mengisi survey berbentuk pertanyaan terbuka tentang kejadian-kejadian yang menimbulkan stress serta dampak yang dirasakan dalam rentang waktu lima hari terakhir. Hasil penelitian menunjukkan bahwa sebagian besar mahasiswa memiliki lebih dari satu jenis stressor dan merasakan dampak dari stress di lebih dari satu aspek. Jenis stressor terbanyak yang dimiliki mahasiswa berasal dari intrapersonal (29.3%), yaitu berupa kondisi keuangan (23%) dan tanggung jawab di organisasi kampus (20%). Selain itu, hasil penelitian menunjukkan bahwa stress memiliki dampak terbesar terhadap aspek fisik (32%). Hal yang sangat sering dirasakan adalah kelelahan dan lemas (21.1%).

Oil palm empty fruit bunches (OPEFB) are solid wastes that can be processed into several chemicals, one of which is furfural. Furfural can be used as a solvent and intermediate compound in many chemical industries. Nowadays, furfural needs in Indonesia are fulfilled through import, especially from China. Therefore, developing a furfural plant in Indonesia is required to fulfill the needs for furfural in Indonesia and surrounding countries. Based on that necessity, this study provides the preliminary study and simulation of furfural production from OPEFB by three kinds of pretreatment methods: soaking in aqueous ammonia (SAA), steam explosion (SE), and ammonia fiber expansion (AFEX). Simulation is conducted using SuperPro Designer Academic License to get the plant’s mass & energy balance and economic parameters. The plant will be built in Kawasan Industri Dumai, Pelintung, Riau. Then, by assuming 7920 hours annual operation time and 2000 kg OPEFB/h input rate, the simulations showed that furfural production with AFEX pretreatment is more economically feasible than with SAA and SE pretreatment. The value of profitability parameters as follows: Internal Rate of Return (IRR) = 49.77%, Net Present Value (NPV) at i = 9.6% = USD 39,210,000, and payback time = 1.75 years.

Furfural is a high-selling compound produced from cellulose and hemicellulose conversion, and the level of demand in Indonesia is still high. This research examines the economic process design and calculation of furfural production made from TKS by varying the purification method with the distillation method and the toluene extraction method using SuperPro Designer 9.5 software. Furfural purification uses two methods, namely furfural purification using toluene extraction scheme and distillation scheme. Two plant location recommendations can be chosen based on the factory’s location close to the buyer, namely in Cilacap, and the plant’s location close to the supplier, namely Banten. Based on the economic calculation results, the toluene extraction purification scheme with an IRR value of 26.02% is more profitable even though its purity is 99.95% compared to the distillation purification scheme with an IRR of 25.86% even though its purity reaches 99.96%. The two recommendations for the location of the calculation of the economic payback period owned by the two locations almost the same. Cilacap, which has an NPV value of 89,739,000 $, is more profitable than Banten, which has an NPV value of 87,430,000 $.