Judul: Pengelolaan Limbah Pabrik Kelapa Sawit (Elaeis guineensis Jacq.) di PT. Surya Intisari Raya-Lukut, First Resources Group, Riau
Abstrak: Kegiatan magang dilaksanakan di PT. Surya Intisari Raya-Lukut, First Resources Group, Riau dari bulan Maret hingga Juni 2016. Limbah kelapa sawit yang dihasilkan dari pengolahan tandan buah segar di Pabrik PT. Surya Intisari Raya-Lukut berupa tandan kosong dan limbah cair kelapa sawit (POME) dikembalikan ke lahan sebagai pupuk organik. Aplikasi tandan kosong di Kebun PT. SIR-Lukut dengan cara ditumpuk membentuk persegi panjang diantara dua pokok yang sebaris di dekat gawangan mati dengan dosis 30 ton ha-1. Aplikasi limbah POME ke lahan menggunakan sistem parit bersekat (flatbed). Dosis limbah cair yang digunakan adalah sebesar 1726.66 ton ha-1 tahun-1 ini tidak sesuai dengan dosis yang dianjurkan perusahaan yaitu 750 ton ha-1 tahun-1 karena rendahnya kadar Biologycal Oxygen Demand (BOD) pada limbah. Perolehan hasil panen lahan aplikasi limbah tandan kosong dan limbah POME tidak berbeda nyata terhadap lahan tanpa aplikasi limbah. Kualitas limbah cair yang diaplikasi ke lahan telah sesuai dengan baku mutu yang ditetapkan yaitu Keputusan Menteri Lingkungan Hidup No. 28 tahun 2003 dan Pergub No.35 tahun 2007, sehingga aplikasi limbah POME aman bagi tanaman kelapa sawit dan tidak mencemari lingkungan.
Keyword: dosis, tandan kosong, POME, flatbed, pupuk organik

Judul: Pengelolaan Limbah Kelapa Sawit (Elaeis Guineensis jacq.) di Kebun Buatan PT Inti Indosawit Subur, Pelalawan, Riau
Abstrak: Waste management aspect was the focus of internship in PT Inti Indosawit Subur from March to June 2011. Besides producing the Crude Palm Oil (CPO) and Kernel Palm Oil (KPO), palm oil industry also produces waste that should be management properly. PT Inti Indosawit Subur has 5.549 ha of palm oil plantation. The processing unit produce some wastes such empty fruit bunch (EFB), palm oil mill effluent (POME), and solid. EFB, POME and Solid have been used in field as organic fertilizer that can reduce usage of inorganic fertilizer. The observation was made on the performance from different block with different treatment of fertilizer / waste application of the workers who spread the empty fruit bunch, the POME flow rotation, flatbed average size, and comparing the crop production. From observation, there was suggested that application of EFB should be improved on supervising to avoid restand. Aplication of POME should also be improved on rotation of application to match with schedule. The comparison of productivity and average weight of fruit bunch proved that application of EFB and POME were effective to reduce inorganic fertilizer without reducing productivity and weight of fruit bunch.
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Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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