1. International Seminar Fisheries and Marine Industrialization 2012

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Browsing 1. International Seminar Fisheries and Marine Industrialization 2012 by Author "Arinafril"

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    AMMONIA Absorption In Nitrogen Industry Wastewater By Microalgae Chlorella Pyrenoidosa, Nannochloropsis Sp. And Bacteria Pseudomonas Fluoresc
    (2016-04-04) Marhaini; Faizal, Muhammad; Dahlan, Muhammad; Arinafril; Marsi
    The growth of Chlorella pyrenoidosa microalgae, Nannochloropsis sp. and the bacterium Pseudomonas fluorescens on urea nitrogen industry wastewater has been investigated as an effort to study the potential of these microorganisms in the remediation of nitrogen industry wastewater. Microalgae and bacteria to be grown on media in water treatment plants with high levels of urea fertilizer NH3-N and by 50 percent urea for inhibitory Concentration (IC50). The results showed that the microalgae C. pyrenoidosa able to grow and tolerant on the levels 626.646 ppm of NH3-N and 1426 ppm urea, Nannochloropsis sp. NH3-N and urea 559.854 1398 ppm, whereas P. fluorescens 723.219 ppm and 1623 ppm urea. Microalgae and bacteria growth at that concentration can absorb C. pyrenoidosa NH3-N 53.46% and urea 58%, Nannochloropsis sp. NH3-N 57.5% and 53.71% urea, whereas P. fluorescens NH3-N 62.47% and 62.47% urea. Based on the results of these studies, microalgae and bacteria have potency to be developed as a bioremediation agent in absorbing nitrogen industry wastewater, on the bottom of the pool, deposition microalgae can be used as an alternative energy source.
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    Toxic Effect Of Mercuronitrate (Hgno3) On Viscera Organs Of River Fish
    (2016-04-04) Suryani, Lilis; Arinafril; Faisal; Ridho, Rasyid
    Mercury waste is one of primary polutants found in the environment, either from industrial, hospital and household wastes, agricultural acitivities, or volcano eruptions. Mercury is a metal element that occurs naturally in the environment. Experiment carried out to assess mercurous salt on the development of freshwater fish, ie Cyprinus carpio, Oreochromis niloticus, Pangasius hypophtalmus, Channa strata, and Clarias batrachus. The results of experiments showed that sensitivity grade of each fish are quite difference in accordance with the ability of fish to detoxify mercurous salt absorbed to fish body. There are many similarities in the toxic effects of the various forms of mercury, but there are also significant differences. Toxicity test result showed that Oreochromis niloticus is very sensitive to this polutant with LC50 0.99 ppm. The lowest sensitivity grade is found for Cyprinus carpio, LC50 2.03 ppm. Respectively, sensitivity grades for each species are Pangasius hypophtalmus (LC50 1.91 ppm), Clarias batrachus (LC50 1.70 ppm), and Channa strata (LC50 1.60 ppm).