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All Journal Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering)
Nuraeni Dwi Dharmawati
Jurusan Teknik Pertanian, Fakultas Teknologi Pertanian, Institut Pertanian Stiper
Agriculture, Biological Sciences & Forestry Engineering

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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%.
PENGAMATAN KUALITAS CPO PADA STORAGE TANK DENGAN PENAMBAHAN SISTEM PENGADUKAN PADA BERBAGAI VARIASI TEMPERATUR Rengga Arnalis Renjani; Riki Sugiarto; Nuraeni Dwi Dharmawati
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 9, No 4 (2020): Desember 2020
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v9i4.343-352

Abstract

Penurunan mutu Crude Palm Oil (CPO) dapat terjadi selama penyimpanan di storage tank dan ketika proses pengiriman, oleh adanya reaksi oksidasi dan reaksi hidrolisis sehingga menurunkan suhu CPO selama penyimpanan. Suhu dipenyimpanan CPO yang tidak terkontrol dengan baik, sering kali menjadi penyebab terjadinya penurunan mutu CPO di dalam storage tank. Penelitian ini bertujuan untuk menganalisis kualitas CPO produksi selama penyimpanan pada berbagai variasi suhu dan pengadukan. Parameter yang diamati dan dianalisis dari proses penyimpanan CPO di storage tank terdiri dari: waktu penyimpanan, variasi suhu, dan penambahan sistem pengaduk atau agitator. Pengambilan sampel dilakukan sebanyak dua kali sehari, sedangkan parameter yang diamati yaitu Asam Lemak Bebas (ALB), kadar kotoran, dan  kadar air. Hasil dari penelitian ini menunjukkan bahwa penggunaan sistem pengadukan dapat memperlambat kenaikan ALB dibandingkan dengan sistem penyimpanan konvensional. Kenaikan kandungan ALB CPO pada penyimpanan konvensional sebesar 0,13% per hari, sedangkan ALB sistem penyimpanan dengan pengadukan hanya menaikkan ALB CPO sebesar 0,05% per hari. Berdasarkan penelitian ini temperatur yang optimum untuk mempertahankan kualitas CPO adalah 50 oC. Kata Kunci: agitator, asam lemak bebas, crude palm oil, storage tank, temperatur
Co-Authors Etty Sri Hertini Rengga Arnalis Renjani Reni Astuti Widyowanti Riki Sugiarto