Judul: Profil Kelarutan Limbah Minyak Berat Akibat Penambahan Bahan Pencampur
Abstrak: Heavy oil waste (HOW) is one petroleum waste in a form of black viscous liquid. Bioremediation is an alternative technology which is friendly, effective, efficient, and economic. However, HOW's solubility in water is in fact very low that we to mixed it with another materials to increase its solubility. The materials used in the mixture were sodium tripolyphosphate (STPP), carboxymethyl celullose (CMC), quartz sand, and pumice stone. The ratio of HOW STPP was 11:1, HOW:CMC was 22:1, HOW:quartz sand was 8:1, and HOW:pumice stone was 5:1. Primary characteristics of HOW were 17.22% solid TPH, 1.96% average moisture content 1.96%, and metal content in HOW were 1.4942 ppm of eu and 3.3300 ppb ofHg. All four of the mixing agent have showed dispersion property that can be shown by several parameters such as turbidity, solid TPH, liquid TPH, pH, and chemical oxygen demand (COD). The highest turbidity was 451.5 NTU for mixed HOW and STPP. While the lowest solid TPH was 13.49% for mixed HOW and pumice stone. The highest liquid TPH value was shown by mixture of HOW and STPP with 0.26%. Range of pH value revealed in the experiment was around between 3.6 until 7.9. The highest COD value of was shown by mixture of HOW and STPP with 7592 mglL. STPP was the best mixing agent.
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Judul: Kemampuan Konsorsium Mikrob dari Kotoran Sapi dan Kuda pada Proses Biodegradasi Limbah Minyak Berat
Abstrak: Heavy oil waste (HOW) which is produced by petroleum industry has become environment problem until now. Bioremediation is a method that can recover the polluted environment. This research was carried out to evaluate microbe consortium from cow and horse manure in biodegradation of heavy oil waste with adjustment of total petroleum hydrocarbon (TPH) 5% (w/v) and 10% (w/v). The observed parameters were solid TPH, liquid TPH, total plate count, chemical oxygen demand, and pH. The highest percent degradation was obtained from 5% TPH. Microbes were easier in degrading 5% TPH than that of 10% TPH. This is because the low toxicity of TPH 5%. TPH degradation at the 21st day reached 40.36% with addition of horse manure consortium enriched by 5% TPH, while with cow manure consortium was only reached 22.77%. TPH degradation at the 21st day was reached with addition of horse manure consortium enriched by 10% TPH, while with cow manure consortium was reached 16.80% of TPH degradation. It also showed that microbes in consortium of cow’s manure were better on degrading HOW than microbes in horse manure consortium.
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Judul: Beberapa aspek anatomi alat sirkulasi ruang dada kancil
Abstrak: Telah dilakukan penelitian dengan menggunakan 10 ekor kancil dewasa jantan dan betina dengan tujuan untuk menge- tahui beberapa aspek anatomi alat sirkulasi di dalam ruang dada, meliputi jantung, pembuluh darah yang keluar dan ma- suk jantung serta ukuran-ukuran jantung. Kancil merupakan ruminansia terkecil di dunia, hidup di daerah tropika India, Thailand, Malaysia dan Indonesia bagian barat. Hewan ini dilindungi dan mempunyai prospek yang baik untuk hewan penelitian maupun dibudidayakan. Hasil penelitian menunjukkan bahwa berat jantung rаta-rata adalah 0.69% dari berat rata-rata kancil. Dan ini mirip pada jantung kuda dan anjing. Bentuk jantung lonjong seperti halnya ruminansia. Demikian pula letaknya di dalam ruang dada seperti pada ruminansia dengan adanya Ligamentum sternopericardiacum. Di dalam ventrikel kanan membersit sebuah Musculus (M.) papillaris dari dindingnya dan tiga sampai empat Musculi (Mm.) papillares dari Septum interventriculare. Hanya dua buah Mm. papillares yang berukuran besar dibersitkan dari dinding ventrikel kiri. Percabangan Arteri (A.) coronaria sinistra lebih dominan dari pada A. coronaria dextra. Sedangkan A. sub clavia sinistra dicabangkan langsung dari aorta di dorso- caudal pembersitan Truncus (Tr.) brachiocephalicus…
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