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All Journal EUGENIA Jurnal Ilmu dan Teknologi Pangan Jurnal Teknologi Pertanian (Agricultural Technology Journal) Jurnal Agroekoteknologi Terapan COCOS
Robert Molenaar
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Agriculture, Biological Sciences & Forestry Computer Science & IT Environmental Science

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PRODUKSI BIOETANOL DARI SINGKONG (Manihot utilissima) DENGAN SKALA LABORATORIUM Jhiro Christian Mailool; Robert . Molenaar; Dedie . Tooy; Ireine A. Longdong
COCOS Vol. 2 No. 1 (2013)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v2i1.729

Abstract

ABSTRACTThis research aims to study techniques bioethanol production from cassava to produce ethanol from cassava and determines the quality of the bioethanol produced by analyzing the ethanol content and pH as well as knowing the yield of bioethanol produced from the process is used. The results have been known to a variety of constraints in the production process from raw material storage, fermentation and distillation that can affect the end result in obtaining bioethanol from cassava. By using 5 kg of cassava feedstock with 3 times distillation process which has produced 215 ml of ethanol to 53% ethanol content and pH 6.902; 185 ml of ethanol to 74% ethanol content and pH 6.927, and 130 ml ethanol with 49% ethanol content and pH 6.573.Keywords: Bioethanol.
UJI TEKNIS TRAKTOR KUBOTA TIPE M9540 PADA PENGOLAHAN LAHAN KERING DI KELURAHAN WAILAN, KOTA TOMOHON Gabriela A. Assa; Ruland Rantung; Robert Molenaar; Daniel P.M. Ludong
COCOS Vol. 5 No. 4 (2014)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v5i4.6586

Abstract

ABSTRACTSoil tillage aims to create physical soil condition suitable for plant growth. It does that by improving soil water and air association as well as water movement in soil. Mechanical soil tillage requires lots of energy; therefore, good tillage practice needs to carefully consider a proper soil condition in order to get the required result. A technical test to Kubota tractor type M9540 with 95 horsepower was done in this research, as it has never been done before in specific soil condition, topography, and climate of the North Sulawesi. The objectives of this research were to measure aspects of effective field capacity and field efficiency, fuel consumption, to calculate tillage cost and tractor Break Even Point. Soil tillage results were also evaluated by measuring soil bulk density, water infiltration and moisture content before and after tillage. The test was done by cultivating the dry land through performing primary and secondary tillage, each was carried out in three replications. The results show that average effective field capacity for first primary tillage was 1.55 m2/second (0.56 ha/hour), second primary tillage was 1.75 m2/second (0.63 ha/hour), and the secondary tillage was 2.72 m2/second (0.98 ha/hour) with average field efficiency was 77.40%, 80.72%, and 56.17% respectively.Total time to complete the first and second primary tillage was 0.11 hour and 0.10 hour, with diesel fuel consumption of 64.17 liters/ha, and 55.44 liters/ha. The secondary tillage required 0.06 hour and fuel consumption of 28.72 liters/ha.The primary and secondary tillage were found to influence the soil moisture content, bulk density, and rate of water infiltration. Tillage basic cost is calculated as Rp.1.765.683 /ha to result a hire charge of Rp. 1.942.251 /ha, and the tractor break-even point was found to be 552 ha/year.Keywords: Tractor, tillage
APLIKASI PEMBELAJARAN PRAKTIS ALAT dan MESIN PERTANIAN BERBASISANDROID Andreas R. Pinontoan; Robert Molenaar; Hildy Wullur
COCOS Vol. 6 No. 11 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v6i11.8396

Abstract

ABSTRACT Information on agricultural machinery and equipment is required for the development of agricultural technology in Indonesia. Although Indonesia is known as an agricultural country, its agricultural technology is considered less developed compared to many other non-agricultural countries. One reason behind this is the dissemination of information regarding agricultural machinery and equipment still believed asunstructured and fragmented. Advancement in information and communication technology has made easiness for people in accessing information. Android operating system is gaining more and more popularity and its userin Indonesia is growingfast. This research aims to develop an Android based practical learning application on agricultural machinery and equipment. This research was carried out during the month of April 2015 to June 2015 and the resulted application was successfully installed in Android as a 1.8 Mb APK file format. The application was tested on CPU emulator and Andromax smartphone followed by a survey to 16 respondents using questionnaire having 10 questions in it (5 questions for application and 5 other questions for content of application). The respondents, who marked each question with 1=very disagree; 2=disagree; 3=neutral; 4=agree; 5=very agree, consist of 10 university students, 3 university lecturers, 1 representing farmer, 1 consultant in agricultural machinery and equipment, and 1 representingcommon people. Results of the test conclude that this Android application can be implemented as information media to improve awareness of public and university students regarding agricultural machinery and equipment in a quicker and a more efficient way. The application can also help disseminating information regarding agricultural machinery and equipment in a more variety way in order to support the development of agricultural technology in Indonesia.
PEMBUATAN APLIKASI E-COMMERCE PRODUK PERTANIAN BERBASIS CONTENT MANAGEMENT SYSTEM (CMS) Lexi M. Pendong; Robert Molenaar; Hildy Wullur; Herry F. Pinatik
COCOS Vol. 6 No. 11 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v6i11.8457

Abstract

ABSTRACT With the current technology developments have made changes in all areas, including trade. Various activities can be done easily and quickly, including buying and selling activities. E- commerce is one of the technology in helping the buying and selling activities. Wide range of products are being sold using e-commerce such as clothes, shoes, bags, food up to ticket. The development of e-commerce is also changing so rapidly, the current CMS (Content Management System) began to be considered to be used to build e-commerce because it is easier and faster in providing information.  North Sulawesi is one area that is famous for its agricultural products such as coconut, cloves and processed products such as palm sugar, coconut oil, and others. Making the application of e-commerce is expected to help provide information related to agricultural products as well as simpifiying the buying and selling activities.  This study aims to create a CMS-based web applications and financial transactions (e-commerce). This research is expected to help the community and students in accessing and providing information related to agricultural products rapidly and extensively, as well as simplifying the buying and selling process via the Internet.
KOMPOR BIOMASSA MENGGUNAKAN BAHAN BAKAR KAYU CENGKEH (SYZYGIUM AROMATICUM (L.) MERR) SEBAGAI SUMBER ENERGI Roni Wakur; Handry Rawung; Robert Molenaar; Daniel P. Ludong
COCOS Vol. 6 No. 13 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v6i13.8665

Abstract

ABSTRACT Penelitian ini bertujuan untuk merancang dan membuat kompor biomassa, serta mengkaji proses pembakaran dengan bahan bakar kayu (cengkeh) dan pindah panas pada kompor biomassa. Analisis dilakukan terhadap suhu nyala api, suhu dinding kompor,suhu dinding luar panci, suhu dinding dalam panci, suhu air dan lamanya pemasakan air. Perhitungan yang dilakukan meliputi energi panas yang terkandung dalam bahan bakar yang digunakan dan energi panas yang digunakan, serta efisiensi pemanasan air. Penelitian ini dilakukan awal bulan Juli sampai awal September 2014 di Bengkel Keteknikan Fakultas Pertanian Universitas Sam Ratulangi Manado. Kajian proses pembakaran ini menggunakan 3 perlakuan yang dianggap taraf yang diambil dari berat bahan bakar yang digunakan yaitu jumlah bahan bakar 500 g, 750 g,  dan 1000 g. Data hasil penelitian dicatat dan dihitung kemudian disusun dalam bentuk tabelaris lalu digambarkan dalam bentuk grafik.  Analisis yang digunakan dalam penelitian ini ialah deskriptif. Hasil penelitian ini menunjukkan bahwa kompor biomassa yang mengunakan bahan bakar kayu sebagai sumber energi dapat memenuhi kebutuhan kelangsungan hidup rumah tangga dalam masak-memasak.  Kata Kunci: Kompor biomassa, bahan bakar kayu cengkeh, efisiensi pemanasan air
ANALISIS OPTIMASI USAHATANI KELOMPOK TANI PAJALE (PADI, JAGUNG DAN KEDELE) DI KABUPATEN MINAHASA SELATAN Christian M. Sumampouw; Prof.Dr.Ir. Robert Molenaar,MS.; Dr.Ir. Dedie Tooy, MSi.
COCOS Vol. 8 No. 2 (2017)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i1.14876

Abstract

ABSTRACT Geographically, South Minahasa district lies between 1 ° 17'18.22 "north latitude and 124 ° 54'48.84" east longitude, with a total area is 1188.67 km2, or approximately 8% of the total area of North Sulawesi (15.069.00 km2 ), with the coast in the north and south and the high plains, where irrigated rice fields provide an abundant harvest. Nature and the weather in this area is suitable for agricultural. At almost all districts  various agricultural crops can grow. Rice cultivation is mostly irrigated, in addition there is still also a rainfed. Planting is done two to three timesa year  and sometimes rotated withother food  crops. Food crops cultivated by the inhabitants consist of rice, corn, potatoes, and other food crops as well as various other horticultural crops. Besides Rice, South Minahasa also produces maize and cassava in relatively large quantities. Thus, the food crop farmers in South Minahasa can choose from various types of crops that can be cultivated in their agricultural lands. This study was conducted in August until September 2016 in South Minahasa regency. Required data were collected using survey methods, and analyzed with linear programming method using  solver application in Microsoft excel. Based on the research results, if the labor supply increased by 2 per family farmers and harvesting is done by machines  the farmer income per year increased from Rp 720 million, - to Rp 1.84 billion, - obtained from the cropping pattern of 15 hectares rice and 10 hectares corn for Musafir 4 farmer groups. the same goes for the Torout Jaya farmer groups, revenue per year increased from Rp 582 million, - to Rp 2.3241 billion, - which is obtained from the cropping pattern 17 hectares of rice and 20 hectares of soybeans.  Keywords : Optimization Farming, Linear Programming, Solver
MODEL SISTEM PAKAR DALAM MENGIDENTIFIKASI PERMASALAHAN PADA JARINGAN IRIGASI PERTANIAN DI BENDUNG TALAWAAN Richard A.V. Koloay; David Rumambi; Robert Molenaar
COCOS Vol. 10 No. 1 (2018)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i3.20871

Abstract

ABSTRACT  This study aims to obtain information about the problems that occur in irrigation networks at the right part of Talawaan dam and produce a computer application model as an expert system. It is hoped that this expert system application can be useful to provide information about the problems that occur in the irrigation network in Talawaan dam, especially on right Talawaan irrigation networks and can provide solution of the problem through an expert system application that can be accessed by each user. This research was conducted in the Technical Laboratory of Agricultural Faculty of Agriculture Technology Department of UNSRAT and in Talawaan dam, Talawaan Subdistrict, North Minahasa Regency, North Sulawesi Province, and divided into two stages: irrigation network data collection and expert system application development.  Data collection on right Talawaan dam is done by calculating inflow water discharge and outflow water discharge and evaporation on primary, secondary and tertiary channel then documentation on problems that occur on irrigation channel. There is a water loss of 0.187 m3 / sec on the primary channel, 0.213 m3 / sec of water loss in secondary channels, and water loss of 0.074 m3 / sec on tertiary channels. Factors that cause water loss include the problem of damage to irrigation channels, garbage accumulation, illegal water taking, and silting of channels by mud. With this expert system, users can get information on problems that occur on irrigation channels and can consult to find solutions to the problem.  Keywords: Irrigation Network and Expert System
ANALISIS ENERGI DALAM PROSES PENGOLAHAN KOPRA RAKYAT Gerson Wohon; Dedie Tooy; Robert Molenaar
COCOS Vol. 10 No. 3 (2018)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i1.22599

Abstract

Abstract  This study aims to determine the energy sources at the stage of the copra processing commonly made by the people, to measure the amount of energy used at each stage of the people's copra processing process, to calculate the total energy used eachs of was obtained by means of energy analysis surveys. The resulting data consists of primary and secondary data.  The total input energy in the process of people's copra is more than twice the amount of output energy contained in the copra produced (870,840 kcal). This condition indicates the need to improve the efficiency of the copra processing process in energy utilization.. Keywords: Energy of coconut fiber, human energy, livestock energy.
SISTEM INFORMASI BERBASIS WEBGIS JARINGAN IRIGASI PERSAWAHAN POPONTOLEN KECAMATAN TUMPAAN KABUPATEN MINAHASA SELATAN Benny .; Robert Molenaar; Sandra E. Pakasi
COCOS Vol. 11 No. 2 (2019): EDISI APRIL-JUNI
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i1.27294

Abstract

ABSTRACT This study aims to create an application of geospatial information on irrigation networks in Popontolen Village that supports the online monitoring and maintenance of irrigation networks based on WebGIS. This information system can be built using computers with low specifications and is supported by easy and free software (open source). This WebGIS design utilizes the framework of QGIS and the Bootstrap framework for the overall appearance of WebGIS, both of which have a programming language for displaying WebGIS. By utilizing free hosting services that are available, this WebGIS prototype can be accessed by internet users by typing the URL in the address bar https://sijaripopontolen.000webhostapp.com/index.html. And can be displayed on various devices both desktop and mobile-based. Keywords : Irrigation Networks,
ANALISIS ENERGI PADA PENGERINGAN PARING DI PT. ROYAL COCONUT AIRMADIDI Yulian Sagrim; Prof. Ir. Robert Molenaar, MS, PhD; Dr. Ir. Frans Wenur, MS
COCOS Vol. 12 No. 1 (2020): EDISI JANUARI-MARET 2020
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v5i5.30055

Abstract

ABSTRACTThis study aims to identify the use of energy sources at the stage of the paring process,calculate the total energy used at the stage of the paring process and calculate the energyefficiency in this case, the efficiency of drying at the paring drying process. From the results ofthis study found the total energy used for paring drying at PT. Royal Coconut Airmadidi of22,808,070,020,500 joules. While the drying efficiency was found to be 33.2%, it means that outof 100% of the energy expended, only 33.2% was actually used in the paring drying process.Keywords: Energy Analysis, Paring Drying.
Co-Authors A.A. Ketut Agung Cahyawan W Andreas R. Pinontoan Andreas R. Pinontoan, Andreas R. Benny . Christian M. Sumampouw Dahlan Daniel P. Ludong Daniel P. Ludong, Daniel P. Daniel P.M. Ludong David P. Rumambi David Rumambi Dedie Tooy Dr. Ir. Frans Wenur, MS Edi Suryanto Esry O. H. Laoh Frans Wenur Gabriela A. Assa Gerson Wohon Gregoria S. S. Djarkasi Handry Rawung Herry F. Pinatik Hildy Wullur Ireine A. Longdong Jhiro Christian Mailool Joel Irianto Arring Johsi R. Rawung Lady C Ch E Lengkey Lady C. Ch. E. Lengkey Lady Lengkey Lexi M. Pendong Lexi M. Pendong, Lexi M. Lucia Cecilia Mandey Manongko, Patricia Syaron Mikael, Florensi Wahyuni Momongan, Fransiska Oktavia Nikita V. Momongan Novan G. Sumampow Paembonan, Fijar Y. Putria G. Rompas Richard A.V. Koloay Rompas, Krisye Sharon Ronal Lumba Roni Wakur Roni Wakur, Roni Ruland Rantung Sandra E. Pakasi Stenli F. E. Pomantow Yulian Sagrim