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. Zuhra
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The Use of a Consortium of Chlorella vulgaris and Pseudomonas putida for Bioremediation of Artificial Sugar Wastewater . Zuhra
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 2, No 2 (2012): Engineering
Publisher : Syiah Kuala University

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Abstract

Sugar wastewater can be a serious problem for environment because of highorganic content namely nitrogen concentration. Other problems caused by the waste are unpleasant colour and an inferable smell. The appropriate treatment is needed for solving the problems. The growth of algae in the pool of waste was suggested as the propertreatment for sugar wastewater. The aim of this research was to study the use of Chlorella vulgaris for the treatment of artificial waste water. Chlorella vulgaris was cultured in artificial wastewater having low pH.Pseudomonas putida was used to supply CO2 for photosynthesis process in a lagoon tank and it was added at the second day. Polyacrylate polyalcohol was also introduced to provide buoyancy effect of the medium All of the experiments were conducted in a rectangular tank using the artificial illumination and it wasalso equipped by air pump to supply oxygen and circulate the waste in the tank. pH, Dissolved Oxygen (DO), Optical Density (OD), Chemical Oxygen Demand (COD) and Total Nitrogen (TN) were measured daily during the experiments. COD was successfully reduced up to 6900 mg/l and 29% of COD removal at the fourth day. The low pH experiments demonstrated the effectiveness of a consortium of algae and bacteria at TN removal from wastewater by reducing the TN from 70 mg/l to below 35 mg/l. According to the above results, it can be concluded that the consortium of Pseudomonas putida and Chlorella vulgaris was applicable as one of alternatives for sugar wastewater treatment
Waste shells of cockle (Clinocardium nuttalli) as solid catalysts for transesterification of calophyllum inophyllum L. oil to biodiesel production Husni Husin; . Zuhra; Fikri Hasfita; Wahyu Rinaldi
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 3, No 2 (2013): Engineering
Publisher : Syiah Kuala University

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In this work, cockle (Clinocardium nuttalli) shell waste is massively produced by many restorant in Banda Aceh Indonesia. The cockle (Clinocardium nuttalli) shell is known high calcium; therefore it is potential to be used as calcium source of catalyst for transesterification reaction. The aim of thisresearch is to study the synthesis and characterization of Clinocardium nuttalli shell. Clinocardium nuttalli shell was prepared by calcinating the shell at 500 and 800°C. Synthesis of solid catalys was employed for transesterification reaction of calophyllum inophyllum L. oil. The reaction was carried out in batch reactor at temperature of 65oC and ratio of mrthanol:oil of 3:1 - 12:1. The synthesized samples were characterized by X-ray diffraction (XRD). Analysis data by XRD confirmed that the obtained crystal calcined at 500 oC areCaCO3 calcite, CaCO3 veterite, and CaO. XRD patterns of the colcined shell at 800 oC shows sharp peaks of crystalline phase of CaO. The best characteristics is obtained at calcined catalyst of 800oC with molar ratios of methanol:oil of 12:1, i.e. density 0.832 g/cm3, viscosity 4.92 cst, and yield 84.1%.
Characteristic and Performance Tests of Membrane PES in Biodiesel Purification by using Ultrafiltration Process Sri Mulyati; Fachrul Razi; . Zuhra; Erna Oktari; . Syawaliah
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 5, No 1 (2015): Engineering
Publisher : Syiah Kuala University

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Abstract

Polyethersulfone (PES) membranes were prepared via phase inversion method. The effect of polymer concentration on the morphology of the fabricated membranes were studied. Furthermore, the effect of transmembrane pressure (TMP)was also studied on the filtration performance of biodiesel purification. The morphology of fabricated PES membrane was analyzed by using Scanning Electron Microscopy (SEM) indicated that the PES membranes had skin layer on the membrane surface and pores layer on the bottom surface. The permeability coefficient (Lp) of PES membranes were about 21-40 L/m2.h. The Molecular Weight Cut Off (MWCO) test shows that the rejection of dextran solution with the molecular weight 18,8Kda was above 90%. The water contact angle of PES membranes was measured to know the hydrophilicity of PES membrane. The water contact angle was about 73oconfirmed that the PES membrane was hydrophobic. The increasing ofTrans-membrane Pressure (TMP) had a significant effect on the permeability of membrane which isthe permeability of biodiesel increases by increasing the TMP. The maximum of flux was obtained about 110 ml/sec
Co-Authors . Syawaliah Erna Oktari Fachrul Razi Fikri Hasfita Husni Husin Mulyati, Sri Wahyu Rinaldi