<p>Kesambi seed oil (<em>Schleichera oleosa</em>) is one of the resources that can be utilized as an alternative to substitute palm oil in cooking oil production due to its lower moisture content, peroxide value, and saponification number. However, the high level of free fatty acid (FFA) and cyanide acid (HCN) contents in kesambi seed oil requires further purification prior to commercialization.  In this study, the purification process of kesambi seed oil was carried out with degumming, adsorption, and neutralization techniques. The degumming process was conducted using phosphoric acid for 20 minutes. Afterwards, the adsorption process was carried out using 25% (w/w) zeolite for 14 h. The neutralization process was subsequently performed with sodium hydroxide. The results showed that as much as 32.87 g of gum was removed during the degumming process. The picric acid tests verified that the adsorption using zeolite reduced the HCN contents, which indicates that the treated oil is safe to consume. The FFA test results showed that the final FFA content for each process was 7.23, 6.46, 6.21%, respectively. This study unfolds the potential of kesambi seed oil as future cooking oil by improving its quality that can satisfy the Indonesia National Standard.</p>

Cottonseed oil (CSO) is well known as one of the commercial cooking oils. However, CSO still needs to compete with other edible oils available in the market due to its small production scale and high processing cost, which makes it a potential candidate as a feedstock for biodiesel production. To date, transesterification is the most widely applied technique in the conversion of vegetable oil to biodiesel, with glycerol produced as a by-product. Large-scale biodiesel production also implies that more glycerol will be produced, which can be further utilized to synthesize hydrogen via the steam reforming route. Therefore here, an integrated biodiesel and hydrogen production from CSO was simulated using Aspen Hysys v11. Simulation results showed that the produced biodiesel has good characteristics compared to standard biodiesel. An optimum steam-to-glycerol ratio for hydrogen production was found to be 4.5, with higher reaction temperatures up to 750 °C resulting in higher hydrogen yield and selectivity. In addition, a simple economic analysis of this study showed that the integrated process is economically viable.

Kurangnya kesadaran warga di Kelurahan Maospati untuk mengelola sampah rumah tangga dan belum berfungsinya TPS3R (Tempat Pengelolaan Sampah Reuse, Reduce, dan Recycle) di Kelurahan Maospati mendorong tim KKN Tematik UNS Membangun Desa menawarkan program pengelolaan sampah secara terpadu. Program pengelolaan sampah terpadu melalui kegiatan pemberdayan dilakukan melalui beberapa tahap dari penetapan dan peninjauan lokasi, penyusunan program kerja yang meliputi kegiatan desain dan pengadaan roadmap pengelolaan sampah, sosialisasi program bank, sosialisasi pengelolaan sampah dan demo pembuatan ecobrick dengan sasaran utama anggota kelompok PKK, serta edukasi mengenai pengelolaan sampah di sekolah-sekolah melalui pemanfaatan botol bekas minuman mereka. Hasil dari program kerja meliputi peningkatan pengetahuan tentang pengelolaan sampah sebesar 51,2% peserta sosialisasi dan 44 % dari masyarakat peserta program sosialisasi mendapatkan manfaat ekonomis dari sampah rumah tangga mereka. Selain itu kegiatan ini mampu membantu mewujudkan lingkungan yang asri, terstruktur dan bersih.