Integrated Vertical Photobioreactor System for Carbon Dioxide Removal Using Phototrophic Microalgae

A vertical photobioreactor containing the microalgae Scenedesmus obliquus is a highly efficient system for converting carbon dioxide (CO2) into biomass. The use of photobioreactor for CO2 mitigation has been explored using microalgae as photosynthetic microorganism. The growth rate (m, h-1) were 0.03; 0.13; 0.20; 0.09 at treatment of 0%, 2%, 5% and 7% pure CO2 supplied, respectively during 16 days experiment. The maximum dried biomass (gr ml-1) was 1.7 at 2% pure CO2. The highest CO2 removal effiency (%) was 34 at 2% pure CO2 supply. The results showed that the photobioreactor gave a high efficiency of CO2 removal by phototrophic microalgae culture

Gambaran Histopatologi Rumen dan Retikulum Sapi Bali Akibat Adanya Benda Asing

Rumen and reticulum hold an important role in the ruminant\u27s digestive tract. During the meal, Bali cattle accidentally ingest foreign objects because they can\u27t distinguish between foreign body object and feed. Cattles do not really chew food before swallowing. This study aims to determine the existence of a foreign body in the stomach and histopathological overview of Bali cattle rumen and reticulum due to a variety of foreign objects. This study used 10 samples of cattle Bali consisting of nine samples of rumen and reticulum contained foreign objects (plastic, metal, wood and stone) and one normal sample of the rumen and reticulum Bali cattle. Samples were obtained from Slaughter House at Mambal, Abian Semal District, Badung regency, Bali. Based on the results of research conducted on the rumen and reticulum Bali cattle, there are a variety of foreign objects such as plastic, metal, wood and stone. Histopathological changes in the mucosa of the rumen and reticulum form of inflammatory cell infiltration from mild to severe. Conclusions from this research that found a foreign body object in the rumen and reticulum Bali cattle, and foreign body objects cause tissue destruction

Synthesis of TiO2 Nanofiber-Nanoparticle Composite Catalyst and Its Photocatalytic Decolorization Performance of Reactive Black 5 Dye From Aqueous Solution

In this study, synthesis of TiO2 nanofiber-nanoparticle composite photocatalyst was carried out and its photocatalytic decolorization performance was investigated. TiO2 nanofibers were developed by electrospinning. The TiO2 nanoparticle films were prepared by dipping the glass substrates into a sol solution made by sol-gel method. The TiO2 nanofiber-nanoparticle composite was immobilized on glass plates and annealed at 500 °C. The effects of pH and catalyst loading were studied during a photocatalytic decolorization experiment using simulated dyeing wastewater containing Reactive Black 5 (RB5). The photocatalytic decolorization performance with 60 min of UV-irradiation time using the TiO2 nanofiber-nanoparticle composite was found to be higher (94.4%) than that of the TiO2 nanofibers (75.5%) and the TiO2 nanoparticle catalyst (74.1%). An alkaline condition and high catalyst loading were found to be preferable to achieve optimum photocatalytic decolorization of Reactive Black 5 (RB5). The TiO2 nanofiber-nanoparticle composite could be recovered after reusing multiple times through re-annealing at a high temperature. TiO2 nanofibers based on a composite catalyst that is strongly immobilized on glass plates enlarges the prospect of the photocatalytic method as a compact, practical and effective advanced treatment process for effluents from textile wastewater