Fibreboards (FBs) bonded by urea-formaldehyde (UF) resin derived from industry were intended to undergo cyclist test, a simulation of recycling activity. Objective of this study was to compare quality of FBs before and after recycling including analyse its wastage. Methods of this study were consisted of evaluation physical and mechanical properties of FBs before recycling, cyclist test, remanufacturing FBs, evaluation recycle FBs (rFBs), comparing the properties between FBs and rFBs and analysing the wastage of recycling activity both solid residue and liquid disposal. Results of this study showed physical and mechanical properties of FBs changed after recycling presumably because of the difference in reproduction method. Some physical properties showed better quality, while the mechanical properties performed decrease drastically. Cyclist test predicted that FBs were more resistant in 3 (three) cyclist compared to that of rFBs. There was wastage of recycling consisting of macro solid fibre with length dimension of 1000.51±339.21 μm and micro solid fibre with variation in distribution size. Liquid disposal (LD) contained nitrogen (N) with amount 0.05% presumably from sol fraction of UF resin. These findings suggested that remanufacturing of rFBs was feasible even though wastage of recycling activity was inevitable. Fortunately, LD can be utilized further for example for fertilizer because the N content exists.
Telah dibahas tentang pengaruh serbuk batang kelapa sawit sebagai pengisi pada pembuatan lembaran plafon gipsum terhadap sifat fisis dan mekanis dan DTA. Jenis perekat yang digunakan adalah pengikat poliuretan. Serbuk batang kelapa sawit divariasikan 5 gram, 10 gram, 15 gram, 20 gram dan 25 gram. Hasil penelitian menunjukkan bahwa sifat fisis (densitas 1,6 gr/cm 3 dan penyerapan air 15,08 %) pada komposisi 5 gram serbuk batang kelapa sawit adalah hasil terbaik. Semakin tinggi kadar serbuk semakin tinggi nilai densitas, sehinggga serapan airnya makin rendah. Hasil uji sifat fisis ini masih memenuhi standar SNI 03-2105, 1996 dan masih diatas nilai sifat fisis plafon gipsum Jaya Board. Dari pengujian sifat mekanik (uji impak 2,0 x 10 -4 J/mm 2 , uji tarik 305,8 kPa, uji kuat lentur/MOE 7233,8 kg/cm 2 dan uji kuat patah/MOR 13,44 MPa) merupakan nilai terbaik dan berada pada komposisi 25:25:15. Ini menunjukkan bahwa komposisi 25:25:15 merupakan komposisi yang paling homogen sehingga sifat mekaniknya optimum. Kata-kata kunci: serbuk batang kelapa sawit, lembaran plafon, poliuretan.
Desa Sayur Matua merupakan desa yang terletak di Kecamatan Aek Nabara, Kabupaten Padang Lawas, Provinsi Sumatera Utara. Luas wilayah Kabupaten Padang Lawas berkisar 3.892,74 km2 atau sekitar 5,33% dari luas Provinsi Sumatera Utara. Program Pengabdian Desa Binaan pembuatan pupuk organik dengan komposter pintar dilaksanakan pada bulan Juli 2020. Metode yang digunakan adalah model participatory rural appraisal, model participatory technology development, model community development, persuasive dan edukatif. Kegiatan yang telah dilaksanakan antara lain pemberian komposter dan juga pelatihan pembuatan kompos memanfaatkan kotoran sapi, eceng gondok, jerami padi dan pelepah sawit dengan menggunakan komposter. Kesimpulan pengabdian kepada masyarakat ini adalah penggunaan komposter dapat dengan efektif menghasilkan pupuk kompos dengan memanfaatkan limbah di sekitar desa mitra.
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