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Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering)
Published by Universitas Lampung
ISSN : 2302 559X     EISSN : 2549 0818     DOI : -
Core Subject : Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Engineering
Jurnal Teknik Pertanian Lampung or Journal of Agricultural Engineering (JTEP-L) is a peer-reviewed open-access journal. The journal invites scientists and engineers throughout the world to exchange and disseminate theoretical and practice-oriented researches in the whole aspect of Agricultural Enginering including but not limited to Agricultural Mechanization, Irrigation, Soil and Water Engineering, Postharvest Technology, Renewable Energy, Farm Structure, and related fields. The first issue was published in October 2012 by Department of Agricultural Engineering, Faculty of Agriculture, University of Lampung. Jurnal Teknik Pertanian Lampung has ISSN number 2302 - 559X for print edition on October 10, 2012 then 2549 - 0818 for online edition on January 10, 2017. Jurnal Teknik Pertanian Lampung is issued periodically four times a year in March, June, September, and December. Jurnal Teknik Pertanian Lampung has been indexed by Google Scholar, Crossref, Directory Open Access Journals (DOAJ), and CABI. Since Volume 5 Issue 1 (2016) Jurnal Teknik Pertanian Lampung has been accredited as SINTA 3 by Directorate General of Higher Education (DIKTI). Starting Volume 10 Issue 3 (2021) the journal received accreditation SINTA 2.
Arjuna Subject : -
Articles 8 Documents
 1 
Search results for , issue "Vol 8, No 3 (2019): September" : 8 Documents clear
Karakterisasi Pelet Pupuk Organik Berbahan Slurry Limbah Cair Pabrik Kelapa Sawit Sebagai Pupuk Slow Release Reni Astuti Widyowanti; Nuraeni Dwi Dharmawati; Etty Sri Hertini; Rengga Arnalis Renjani
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 8, No 3 (2019): September
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1301.31 KB) | DOI: 10.23960/jtep-l.v8i3.187-197

Abstract

The high availability of slurry from palm oil mill effluent, solid, and boiler ash with their nutrient contents make those three materials are potential to be processed become organic fertilizer in the form of pellet so it tends to has slow release characteristic. This research aims to analyize characteristic of organic fertilizer pellet from slurry of palm oil mill effluent as slow release fertilizer by analyzing its physical characteristics, NPK content, and NPK releasing rate in soil.Slurry was processed become solid fertilizer in the form of pellet using pellet mill with tapioca adhesive 5%. Pellet was made from slurry, solid, and boiler ash which were mixed with ratio 1:1:1, 1:2:2, 2:1:1, 2:2:1, 2:1:2, 1:0:0 (only slurry). This research ware analysis of physical characteristis (length, diameter, and density) and analysis of NPK content. N content was analyzed using Kjeldahl method, P content using spectrophotometer, and K content using Atomic Absorbtion Spectrophotometer (AAS). Then it was continued with analysis of NPK releasing content in latosol soil.The average length of pellets was 31–48 mm, diameter was 5,42 – 6,28 mm, water content was 0,426 – 0,976%, particle density was 1,04 – 1,34 g/cm3, and bulk density 0,49–0,63 g/cm3. Organic fertilizer pellet in six formulas contained N+P2O5+K2O about 5,93–8,08%. The highest content (8,08%) was produced from 1:0:0 pellet, followed by 2:1:2 formula (7,53%), and 1:2:2 formula (7,25%). Until the 10th days, the releasing of N element was about 1,99 – 3,18%, P element was 0,063– 0,075%, and K element was 43,54 – 62,26%.
PERFORMANCE ANALYSIS OF WORKING FLUIDS ON ORGANIC RANKIE CYCLE (ORC) MODEL WITH BIOMASS ENERGY AS A HEAT SOURCES Lilis Sucahyo; Muhamad Yulianto; Edy Hartulistiyoso; Irham Faza
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 8, No 3 (2019): September
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1410.827 KB) | DOI: 10.23960/jtep-l.v8i3.175-186

Abstract

Organic Rankine Cycle (ORC) is an electricity power technology particularly suitable for medium-low temperature heat sources and/or for small available termal power. This paper presents the simulation and performance analysis of working fluids R-134a, R-414B, R-404A and R-407C on ORC with biomass energy as a heat source. Simulation of the ORC system using Cycle Tempo software. The property of working fluids is obtained by using Reference Fluid Properties (Refprop). The best result performance of ORC was shown by working fluid R-404A with thermal efficiency 7.54 % and electric power output ranges between 0.075 kW. This condition operated on turbine inlet temperature at 60 oC, difference turbine working temperature of 15 oC, condensing temperature 25 oC and water boiler mass flow rate 3 lpm.
POTENSI BIOGAS DARI PROSES REKAYASA AKLIMATISASI BIOREAKTOR AKIBAT PERUBAHAN SUBSTRAT PADA INDUSTRI BIOETHANOL Julfi Restu Amelia; Udin Hasanudin; Erdi Suroroso
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 8, No 3 (2019): September
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1268.862 KB) | DOI: 10.23960/jtep-l.v8i3.224-233

Abstract

Produksi etanol (bioetanol) dari bahan baku biomassa merupakan salah satu cara mengurangi polusi lingkungan dan konsumsi terhadap minyak mentah.  Salah satu bahan bakar yang dapat diperbaharui yakni bioethanol yang merupakan produk turunan dari singkong dan tetes tebu dengan menggunakan teknik proses multiple feedstock system. Industri bioethanol tidak hanya memproduksi produk utama berupa etanol, tetapi juga menghasilkan air limbah dalam jumlah besar. Air limbah bioethanol berbahan baku singkong disebut dengan thinslop, sedangkan air limbah bioethanol berbahan baku tetes tebu disebut dengan vinasse. Adanya proses perubahan substrat dari thinslop ke vinasse akan menyebabkan perubahan beban mikroorganisme dalam penguraian bahan organik . Tujuan dari penelitian yakni  untuk mengukur potensi produksi biogas dari proses rekayasa aklimatisasi perubahan substrat. Penelitian menggunakan tiga bioreaktor CSTR dengan kapasitas 50 L. Perlakuan setiap bioreaktor yakni 50% thinslop dan 50% vinasse; 25% thinslop dan 75% Vinasse, dan 100% Vinasse, dengan laju pembebanan berbeda setiap minggu (0,5 g / L hari, 1,0 g / L hari, 1,5 g / L hari, dan 2,0 g / L hari). Hasil penelitian menunjukkan bahwa nilai potensial biogas dari bioreaktor pertama (50% thinslop: 50% vinasse), bioreaktor kedua (25% thinslop: 75% vinasse), dan bioreaktor ketiga (100% vinasse) berturut-turut yakni 39,39 L/hari, 38,97 L/hari 27,23 L/hari. Hasil penelitian juga menunjukkan bahwa kandungan gas metana secara berturut-turut dari bioreaktor pertama, bioreaktor kedua, dan bioreaktor ketiga (100% vinasse) sekitar 32,67-52,81%, 40,29-67,29%, 20,46-57,33%. Kata kunci : bioethanol, singkong, tetes tebu, bireaktor, aklimatisasi
ANAEROBIC DIGESTER VARIATION FOR BIOGAS PRODUCTION ON COFFEE WASTEWATER TREATMENT Elida Novita; Hendra Andiananta Pradana; Sri Wahyuningsih; Bambang Mahraenanto; Moh Wawan sujarwo; Moh. salman A. Hafidz
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 8, No 3 (2019): September
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1244.267 KB) | DOI: 10.23960/jtep-l.v8i3.164-174

Abstract

Wet coffee processing methods will produce waste water containing organic matter. The high content of organic matter can be utilized as biogas through the anaerobic process. Biogas becomes renewable energy source. Anaerobic digesters construction can affect removal process of wastewater pollution and biogas quantity. The research aim’s was determine the performance biogas production of digester construction on conventional digester, CSTR and UASB from coffee waste water.  The conventional digester worked without temperature control system, a UASB digester, and CSTR digester worked with temperature control system. Biomass volume was about 5 L with 35 days incubation time. The research result showed variation of biogas production on each digester. Based on the feeding variations, UASB has a stable performance with 83.57 ml/day of average biogas production.  It has also highest remediation efficiency of COD, BOD and C/N with 85.00±0.34 %, 84.40%± 5.66 and 97.78± 0.57.
EXPLORE THE CHARACTER OF SOIL SPECTRAL REFLECTANCE RELATE TO THE SOIL ORGANIC MATTER CONTENT Sari Virgawati; Muhjidin Mawardi; Lilik Sutiarso; Sakae Shibusawa; Hendrik Segah; Masakazu Kodaira
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 8, No 3 (2019): September
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1369.037 KB) | DOI: 10.23960/jtep-l.v8i3.214-223

Abstract

ABSTRACTThe visible and near-infrared (Vis-NIR) diffuse reflectance spectroscopy has emerged as a rapid and low-cost tool for extensive investigation of soil properties. The objective of this research was to explore how significant the relationship between the soil spectral reflectance and soil organic matter (SOM) content. Some soil samples in Yogyakarta were taken for SOM content and spectroscopy measurement. The SOM was analyzed using Walkley and Black method, while the spectral reflectance was determined using ASD Field-spectrophotometer by scanned the sample with Vis-NIR spectrum. Pearson’s coefficient showed that there was a strong negative correlation between SOM and soil spectral of certain wavelengths. Soil with less organic matter content performed high reflectance. Keywords: Soil organic matter; Vis-NIR spectroscopy; soil reflectance; Pearson’s correlation coefficient.
Prototype of Corn Thresher Unit for Corn Combine Harvester Diang Sagita; Radite Praeko Agus Setiawan; Wawan Hermawan
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 8, No 3 (2019): September
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1297.102 KB) | DOI: 10.23960/jtep-l.v8i3.153-163

Abstract

One of the ways to support corn production is through technology implementation, but the domestic industries have not attempted to produce technology for harvesting activities especially corn harvesting. This research was carried out to get the best design, prototype and performance of corn thresher unit to be applied to the design of a corn combine harvester. The components consist of threshing cylinders, perforated cages, grain screw conveyors and corn cob entry holes. The research method begins from analyzing (functional and structural designs), designing, testing performance, evaluating and modifying. The performance test was carried out stationary using corn cob raw material. The performance of the thresher unit has been quite good. The results show that the best performance was the prototype with the last modification (C). Threshing efficiency reached 93.75%, percentage of un-threshed kernel was 6.25%, and cleanliness level 90.68%. While threshing capacity was 358.28 kg/hour, which corn cob feeding was carried out by humans with a feeding capacity of 420.05 kg/hour
PENGARUH KETINGGIAN TEMPAT TUMBUH DAN METODE PENGERINGAN TERHADAP ORGANOLEPTIK DAN KADAR ASIATIKOSID PEGAGAN (Centella asiatica (L) Urb) Devi Safrina; Sofa Farida; Endang Brotojoyo; Inas Kamila
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 8, No 3 (2019): September
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1105.02 KB) | DOI: 10.23960/jtep-l.v8i3.208-213

Abstract

Pegagan (Centella asiatica (L) Urb) merupakan salah satu jenis tanaman obat yang semakin dikenal masyarakat. C. asiatica merupakan tanaman yang dapat hidup dari dataran rendah hingga dataran tinggi. Perbedaan ketinggian tempat tumbuh yang mempengaruhi lingkungan sekitar juga menghasilkan kandungan kimia yang berbeda pada tanaman. Bahan jamu mempunyai beberapa kriteria diantaranya susut pengeringan, organoleptik, dan kandungan kimia. Salah satu kandungan kimia yang berkasiat obat dalam tanaman C. asiatica yaitu asiatikosida. Kandungan kimia suatu bahan sangat dipengaruhi oleh proses pascapanen salah satunya adalah pengeringan. Penelitian ini bertujuan mengetahui pengaruh ketinggian tempat tumbuh dan metode pengeringan terhadap organoleptik dan kadar asiatikosida. Variasi ketinggian yang digunakan yaitu ketinggian 600 mdpl dan 900 mdpl. Metode pengeringan yang digunakan yaitu sinar matahai, kombinasi matahari dan box dryer, pengeringan box dryer, kombinasi box dryer dan oven, serta pengeringan oven. Hasil penelitian yang dilakukan menunjukkan bahwa ketinggian tempat tumbuh dan metode pengeringan berpengaruh terhadap warna dan rasa serta kadar asiatokosida, tetapi tidak berpengaruh terhadap aroma simplisia C. asiatica. Tempat tumbuh ketinggian 600 mdpl dengan metode pengeringan kombinasi box dryer dan oven memberikan nilai tertinggi kadar asiatikosida yaitu 0,94 ± 0,07 %.
Analisis Perubahan Penggunaan Lahan Daerah Aliran Sungai (DAS) Air Dingin Dan Dampaknya Terhadap Aliran Permukaan Rio Valery Allen; Rusnam Rusnam; Feri Arlius; Revalin Herdianto
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 8, No 3 (2019): September
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1201.98 KB) | DOI: 10.23960/jtep-l.v8i3.198-207

Abstract

Perubahaan tata guna lahan merupakan sesuatu yang pasti terjadi sebagai akibat adanya pertambahan penduduk dan perkembangan ekonomi. Namun perubahan tata guna lahan sering kali mengabaikan respon hidrologi sebagai akibat pertambahan penduduk. Adanya banjir di tahun 2016 mengindikasikan adanya permasalahan dalam tata guna lahan pada DAS Air Dingin. Berpijak pada permasalahan tersebut penelitian ini memiliki tujuan untuk: (a) menganalisa pengaruh perubahaan penggunaan lahan terhadap respon hidrologi di DAS Air Dingin, dan (b) menentukan pengelolaan lahan optimal sehingga mengurangi laju aliran permukaan yang terjadi di DAS Air Dingin. Menggunakan model HEC-HMS dan metode Curve Number – Soil Conservation Service (CN-SCS) dalam merumuskan skenario penggunaan lahan sehingga aliran permukaan di DAS Air Dingin dapat digambarkan dalam bentuk hidrograf. Nilai CN-SCS divalidasi menggunakan metode Nash-Sutclife dengan nilai efisiensi (E) 0,75 yang berarti model memiliki akurasi tinggi dan dapat diterapkan. Hasil simulasi terhadap skenario 1 menghasilkan debit puncak 497 m3/s lebih kecil jika dibandingkan debit puncak lahan existing 502,4 m3/s.

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