This article discusses engine performance using diesel oil and biodiesel obtained from the reaction of vegetable oils with alcohol through the process of alcoholysis. Tests carried out on variations of diesel oil 100% (B0), 10% biodiesel (B10), 20% biodiesel (B20) and 30% biodiesel (B30). Engine performance testing is carried out at 1500 rpm to 4000 rpm at intervals of 500 rpm. The highest torque is obtained at 2000 rpm using B0, B10 and B20 of 310.3 Nm, 306 Nm and 308.1 Nm, respectively. The highest power is obtained at 3000 rpm using B0, B10 and B20 of 114.7 hp, 115.1 hp and 114.9 hp, respectively. The average fuel consumption with B0, B10 and B20 is 1.42 ml/s, 1.54 m/s, and 1.74 ml/s, respectively. B30 fuel cannot be tested on a vehicle due to detonation so that combustion does not occur completely and B30 fuel properties are incompatible with the vehicle being tested.

The provision of animal feed in the form of forages or soybeans made by goat farmers in general is still traditional. Drajat Village is one of the villages where the goat breeders still use conventional methods in processing their feed. The aspect needed in small to medium scale farms is the speed of feed production time in the form of powder feed that is ready for use. To fulfill this aspect, we made goat feed chopping machines in the implementation of this Community Service Program (PKM). The animal feed chopping machine is designed with various stages including observation, consultation, science and technology diffusion, training and socialization of the use of tools. The components that are made include the engine frame, cutting knife and trajectory of entering the raw material (soybean cake). Whereas for components purchased are pulleys, V-belts, drive motors, shafts, casings and bearing bearings. From these components the assembly and manufacturing process will be carried out using tool kit equipment. The aim of this program is to provide skills training to groups of goat farmers in processing feed sources by doing mechanical processing through modernization of livestock with multipurpose animal feed counting machines, reducing the level of difficulty in animal feed search especially in the dry season and providing insight into entrepreneurship in the field of animal husbandry utilize raw materials to do the grinding process and then can be marketed to farmers in various regions. The results of this program are the achievement of a group of goat farmers who are able to produce or process animal feed independently in powder form. When animal feed ingredients are abundant, they make powder feed and store it as food self-sufficiency during the dry season.ABSTRAK Pemberian pakan ternak berupa hijauan ataupun onggok kedelai yang dilakukan oleh peternak kambing pada umumnya masih bersifat tradisional. Desa Drajat adalah salah satu  desa dimana para peternak kambingnya masih  menggunakan cara konvensional dalam pengolahan pakannya. Aspek yang dibutuhkan dalam peternakan skala kecil hingga menengah adalah kecepatan waktu produksi pakan dalam bentuk pakan serbuk yang siap digunakan. Untuk memenuhi aspek tersebut, kami membuat mesin pencacah pakan ternak kambing dalam pelaksanaan program Pengabdian Kepada Masyarakat (PKM) ini. Mesin pencacah pakan ternak dirancang dengan berbagai tahapan meliputi observasi, konsultasi, difusi iptek, pelatihan dan sosialisasi penggunaan alat. Adapun komponen yang dibuat meliputi rangka mesin, pisau potong dan lintasan masuk bahan baku (onggok kedelai). Sedangkan untuk komponen yang dibeli yaitu pulley, V-belt, motor penggerak, poros, casing dan bantalan bearing. Dari komponen-komponen tersebut akan dilakukan proses perakitan dan pembuatan dengan menggunakan peralatan tool kit. Tujuan dari program ini adalah untuk memberikan pelatihan keterampilan kepada kelompok peternak kambing dalam mengolah sumber pakan dengan melakukan penggolahan secara mekanis melalui modernisasi peternakan dengan mesin pencacah pakan ternak serbaguna, mengurangi tingkat kesulitan dalam pencarian pakan ternak terutama dimusim kemarau serta memberikan wawasan berwirausaha dalam bidang peternakan dengan memanfaatkan bahan baku untuk dilakukan proses penggilingan dan selanjutnya bisa dipasarkan ke peternak di berbagai daerah. Hasil dari program ini yaitu tercapainya kelompok peternak kambing yang mampu memproduksi atau mengolah secara mandiri pakan ternak dalam bentuk serbuk. Pada saat bahan baku pakan ternak melimpah, mereka membuat pakan serbuk dan menyimpannya sebagai swasembada pangan pada saat musim kemarau tiba.Kata kunci : mesin pencacah; onggok kedelai; pakan ternak; kambing

Water is one of the important components of human life or other living things. With the increasing number of residents, the need for clean water has also increased. However, this increase in demand is not offset by the availability of clean water due to the lower quality of water produced by the water treatment plant. Therefore, it is necessary to do alternative water treatment so that clean water needs can be sufficient. One method of processing clean water that can be done is the Jar test method. This study aims to determine the effect of coagulant dose addition on water quality parameters including pH, turbidity, TDS and total hardness of the Manisrejo City Madiun well water sample after water treatment. The research method is carried out through three stages, namely the preparation stage, the instrument analysis stage and the experimental stage. Where the type of coagulant used is Poly Aluminum Chloride (PAC). From the research that has been done, the optimum PAC coagulant dose is 43 mg / l. The conclusion obtained in this study is that the greater the coagulant dose added to the water sample, the smaller the pH value, the value of turbidity, the TDS value and the total hardness of the water sample.

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Converter kits are equipment used to translate fuel oil (CNG) into gas fuel (CNG) in convertible vehicles. The use of a converter kit with CNG liquefied petroleum gas (LPG) will be used to optimize engine performance while driving, but its use is not yet known among the public because it is not affordable and there is no transition from fuel to consumed gas. Therefore, it is necessary to design a simple converter kit, affordable by the community, and can be supported on two different fuels. This study redesigned the manual converter kit with a research focus on aluminum gas mixer components with variations in the number of intake mixers (1, 2, and 3) and added mixing zones in the mixer area, using 110 cc single cylinder motorized engine with carburetor fuel system with a variation of 1500-9000 rpm. Engine performance testing is done using a chassis dynamometer. The use of LPG fuel in various types of input mixers is able to increase torque and power on the engine. Engine performance test data shows that the best torque value on the use of LPG materials in input mixer 1, 2, and 3 holes respectively are 17.44 Nm, 16.77 Nm and 11.71 Nm, while for gasoline fuel is 16 Meanwhile, the value of power in the use of LPG fuel with the input of mixer 1, 2 and 3 holes is capable of producing maximum power respectively 7.1 Hp, 7.4 Hp and 7.3 Hp, while for gasoline fuel at 7.7 Hp. The use of LPG fuel with the number of 1 hole mixer input is the best variation compared to gasoline fuel and the number of mixer inputs in the other variations.