Judul: Dairy Farm Waste Treatment Using Black Soldier Fly (Hermetia Illucens).
Abstrak: Penelitian ini bertujuan untuk mengolah limbah organik yang dihasilkan Peternakan X sesuai potensi limbah yang dihasilkan dengan memanfaatkan larva serta proyeksi biaya dalam pengolahan limbah menggunakan BSF. Penelitian ini menggunakan dua langkah pendekatan dalam pengolaham limbah Peternakan X, yang pertama adalah penelitan pendahuluan untuk melihat performa larva Black Soldier Fly (BSF) dengan kontrol (Pur ayam komersil (1000 g) + water mixer (air 1000 g)), P1 (SFPM (600 g) + water mixer (air 300 g), P2 (SFPM (550 g) + Refusal (150 g) + water mixer (air 200 g dan susu reject 100 g)). P3 (SFPM (390 g) + Refusal (210 g) + water mixer (air 150 g dan susu reject 150 g)). Performa terendah pada perlakuan dengan komposisi pakan SFPM 600 g, dan air 300 g ,dengan bobot awal 100 g menjadi 107,67 selama 39 hari dan persentase hidup larva 20,53%,. Performa terbaik dengan komposisi pakan SFPM sebanyak 390 g, refusal 210 g, air 150 g dan susu reject 150 g, dengan bobot awal 100 g menjadi 346,60 g dengan persentase hidup larva sebesar 66,13% dengan siklus 39 hari., The objective of the experiment was to treat the organic waste produced by X dairy farm based on the potential waste produced by utilizing larvae and the projected scale-up costs in waste treatment using BSF. This study uses a two-step approach in treating X livestock waste, the first is preliminary research to see the performance of Black Soldier Fly (BSF) larvae with P0 ( Chicken feed (1000 g) + water mixer (1000 g water)), P1 (SFPM). (600 g) + water mixer (water 300 g), P2 (SFPM (550 g) + Refusal (150 g) + water mixer (200 g water and 100 g reject milk)) P3 (SFPM (390 g) + Refusal (210 g) + water mixer (150 g of water and 150 g of reject milk). The lowest performance was treated with SFPM feed composition of 600 g and water 300 g, with an initial weight of 100 g to 107.67 for 39 days and larval survival percentage of 20.53%, the larval cycle became pre-pupae 39 days. The best performance with the composition of SFPM feed as much as 390 g, refusal 210 g, water 150 g and reject milk 150 g, with an initial weight of 100 g to 346,60 g for 39 days with a larval survival percentage of 66,13%.
Keyword: Black Soldier Fly, limbah peternakan, analisis biaya, Black Soldier Fly, cost analysis, Farm Waste

Judul: Biokonversi Limbah Organik Pasar Agrobis Magetan Menjadi Protein Pakan Ternak Menggunakan Larva Black Soldier Fly
Abstrak: Salah satu pengolahan limbah organik yang ramah lingkungan adalah biokonversi limbah organik menggunakan larva black soldier fly (BSF). Penelitian ini bertujuan menganalisis karakteristik dekomposisi limbah organik Pasar Agrobis dengan larva BSF, serta mengaplikasikan dan mengkaji mutu pakan pengolahan larva BSF sebagai alternatif substitusi protein bagi pakan ternak. Penelitian dilaksanakan pada Maret-April 2022 di Kabupaten Magetan, Jawa Timur. Karakteristik dekomposisi limbah padat organik menggunakan larva BSF diidentifikasi dengan waste reduction index (WRI), fresh matter consumption rate (FMCR), dry matter reduction (DMR), dan dry matter consumption rate (DMCR). Nilai WRI dan FMCR untuk limbah organik Pasar Agrobis selama 15 hari, yaitu 3,2%/hari dan 32,1 mg/larva/hari. Nilai persen DMR sebesar 84,4% dan nilai DMCR sebesar 27,1 mg/larva/hari. Aplikasi larva BSF sebagai substitusi protein pakan memenuhi persyaratan mutu pakan berdasarkan SNI 8173:2015, kecuali lemak kasar dan serat kasar. Pertambahan bobot ayam broiler umur 8-21 hari (starter) dan 21 hari ke atas (finisher) selama 12 hari berbeda nyata terhadap pakan komersial (p>0,05) dengan nilai rasio konversi pakan (RKP) lebih rendah., One of the environmentally friendly organic waste treatments is the bioconversion of organic waste using black soldier fly (BSF) larvae. This study aims to analyze the decomposition characteristics of organic waste in the Agrobis Market with BSF larvae, apply, and examine the quality of animal feed from BSF larvae as an alternative to protein substitution. The study was conducted in March-April 2022 in Magetan Regency, East Java. Characteristics of the decomposition of organic waste using BSF larvae were identified with waste reduction index (WRI), fresh matter consumption rate (FMCR), dry matter reduction (DMR), and dry matter consumption rate (DMCR). The value of WRI and FMCR organic waste for 15 days were 3,2%/day and 32,1 mg/larva/day. The percent DMR was 84,4% and DMCR was 27,1 mg/larva/day. The application of BSF larvae as protein substitution meets the animal feed quality based on SNI 8173:2015, except for crude lipid and fiber. The growth gain of broiler aged 8-21 days (starter) and above 21 days (finisher) for 12 days obtained significantly different against commercial feed (p>0.05) with a lower food convertion ratio (FCR) value.
Keyword: Agrobis Market, bioconversion, black soldier fly, broiler

Judul: Penggunaan Teorema Homeomorphy 2-Manifold dan Teorema Euler Poincare pada Torus 𝑇�� dan Simplicial Complex 𝐾��
Abstrak: Two dimensional topological spaces are said to be homeomorphic if they have the same topological invariant, where one of topological invariant used is an Euler characteristic. Homeomorphy 2-Manifold’s Theorem and Euler Poincare’s Theorem are used to distinguish two topological spaces. Homeomorphy 2-Manifold’s Theorem uses Euler characteristic to identify two dimensional topological spaces. Euler Poincare’s Theorem is an alternative way to find Euler characteristic with Betti number, which is topological invariant as well. The objective of this paper is to investigate the homeomorphism of torus 𝑇����� and simplicial complex 𝐾�����. Topological space torus and simplicial complex 𝐾����� have the same Euler characteristic, which is two. Based on Homeomorphy 2-Manifold’s Theorem topological space torus 𝑇����� and simplicial complex 𝐾����� is homeomorphic.
Keyword: simplicial, torus, Euler, homeomorphism, topology