Judul: Design of Organic and Plastic Waste Processing in the Implementation of Circular Economy in Ciampea District
Abstrak: Kecamatan Ciampea adalah salah satu Kecamatan di Kabupaten Bogor dengan permasalahan sampah yang krusial. Belum terdapatnya pengolahan terhadap sampah organik dan plastik, serta sampah hanya langsung dibuang ke TPA Galuga. Tujuan dari penelitian ini merancang sistem pengolahan sampah organik dan plastik berbasis ekonomi sirkular. Penentuan komposisi sampah dilakukan dengan sampling sampah berdasarkan SNI 19-3964-1995 selama 8 hari berturut – turut. Berdasarkan sampling yang dilakukan, diperoleh rata- rata komposisi sampah organik, sampah anorganik, dan sampah lainnya secara berurutan adalah 51%, 45%, dan 4%. Jenis pengolahan menghasilkan produk yang bernilai jual, dimana sampah organik mudah membusuk akan dikomposkan dengan bantuan larva BSF, sementara sampah plastik akan diolah menjadi cacahan plastik dan biji plastik. Sampah organik yang direduksi sebesar 80%. Sampah plastik yang akan dicacah adalah jenis plastik PE, PP, PET, dan sachet multilayer. Jenis plastik utama yang akan di didtribusikan ke mitra X adalah jenis plastik PE., Ciampea District is one of the districts in Bogor Regency with critical waste issues. There is currently no processing of organic and plastic waste, and the waste is directly disposed of in the Galuga landfill. The aim of this research is to design a waste processing system based on circular economy principles. The determination of waste composition was carried out by sampling waste based on SNI 19-3964- 1995 for 8 consecutive days. Based on the sampling conducted, the average composition of organic waste, inorganic waste, and other waste is 51%, 45%, and 4%, respectively. The chosen waste processing methods aim to produce valuable products. Organic waste, which is easily biodegradable, will be composted with the help of Black Soldier Fly (BSF) larvae, while plastic waste will be processed into plastic flakes and plastic pellets. The reduction of organic waste is targeted at 80%. The plastic waste to be shredded includes PE, PP, PET, and multilayer sachet plastics. The main type of plastic to be distributed to partner X is PE plastic.
Keyword: BSF, composting, shreds, plastic, waste

Judul: Design of Waste Collection and Transportation System for Circular Economy Implementation in Ciampea District
Abstrak: Sampah adalah bahan sisa makhluk hidup yang harus dikelola secara komprehensif dan terpadu. Pengelolaan sampah di Kecamatan Ciampea merupakan masalah nyata yang kini sedang dihadapi akibat adanya peningkatan jumlah penduduk yang mengakibatkan peningkatan timbulan sampah yang dihasilkan. Permasalahan mengenai pengumpulan dan transportasi sampah di Kecamatan Ciampea juga perlu dievaluasi akibat adanya peningkatan timbulan sampah tersebut. Hal ini menjadi dasar tujuan dari penelitian ini yaitu mengetahui pengelolaan sampah yang telah dilakukan di Kecamatan Ciampea serta mendesain pengelolaan maupun penenempatan TPS dan TPS 3R di beberapa desa di Kecamatan Ciampea. Data primer yang digunakan diperoleh melalui metode sampling yang dilakukan pada sekolah, instansi, toko dan perumahan yang ada di Kecamatan Ciampea. Data sekunder yang diperoleh dari pihak terkait digunakan untuk menunjang hasil perhitungan data primer. Hasil pengolahan data menunjukkan bahwa terdapat timbulan sampah sebesar 22,8 ton/hari dengan komposisi sampah di Kecamatan Ciampea terdiri dari 51% organik yang berasal dari sisa makanan 36%, sampah kertas 14% dan dedaunan 2%, sedangkan sampah plastik sebesar 45% dengan komposisi plastik PP 10%, PE 26%, PET 4%, dan multilayer 5% lalu sampah lainnya 4%. Sampah yang dapat dikelola dengan adanya pembangunan TPS 3R adalah 12,1 ton/hari., Waste is the residual material of living things that must be managed in a comprehensive and integrated manner. Waste management in Ciampea Sub-district is a real problem that is currently being faced due to an increase in population which results in an increase in the amount of waste generated. Problems regarding waste collection and transportation in Ciampea Sub-district also need to be evaluated due to the increase in waste generation. This is the basis for the objectives of this study, namely to determine the waste management that has been carried out in Ciampea District and to design the management and placement of TPS and TPS 3R in several villages in Ciampea District. The primary data used was obtained through a sampling method carried out at schools, agencies, shops and housing in Ciampea District. Secondary data obtained from related parties is used to support the results of primary data calculations. The results of data processing show that there is a waste generation of 22.8 tons / day with the composition of waste in Ciampea District consisting of 51% organic originating from 36% food waste, 14% paper waste and 2% foliage, while plastic waste is 45% with a plastic composition of PP 10%, PE 26%, PET 4%, and multilayer 5% and other waste 4%. The waste that can be managed with the construction of TPS 3R is 12.1 tons/day.
Keyword: Lingkungan, Sampah, TPS, TPS 3R, Environment, TPS, TPS 3R, Waste

Judul: Comparison of HIV Model with and without Time Delay
Abstrak: Acquired immunodeficiency syndrome (AIDS) is the reduction of the human immune system. AIDS is caused by human immunodeficiency virus (HIV). No medicine has been found for this desease until recently. An AIDS therapy is usually performed with highly active antiretroviral therapy, namely reverse transcriptase inhibitors, protease inhibitors and combination of both. Various models have been developed to explain the immune system of patients with AIDS, namely the HIV, response and the time delay model. This paper discusses the comparison between the dynamics of the HIV virus, the dynamic response of protease inhibitors and dynamics of time delay. The dynamics model of HIV is influenced by the level of white blood cells produced and the rate of its death. Dynamics of protease inhibitors on the response and the time delay model is influenced by the death rate of infected white blood cells and the failure rate of treatment.
Keyword: