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All Journal Nusantara Science and Technology Proceedings
O. H. Cahyonugroho
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Economics, Econometrics & Finance Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Medicine & Pharmacology

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Empowerment of Light Exposure and Nutrient Composition to Photobioreactor of Algae Performance O. H. Cahyonugroho; A. U. Farahdiba; A. A. H. Putro
Nusantara Science and Technology Proceedings International Seminar of Research Month Science and Technology for People Empowerment.
Publisher : Future Science

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Abstract

Air pollution, such as CO2 gasoeus, is one of the environmental issue in the world, instead of other gasoeus pollutant. Microalgae has been known as an micoplant that could adsorb CO in order to reduce CO2 concentration. Microalgae fixation reachs 10-15 times more efficient compared with the other microplants. Microalgae growth depends on many factrs, such as light, temeprature, nutrition, pH, salinity, CO2, techinal aspect, bitic factors, etc. The objective of this research is to know the correlation of light exposure and nutrient composition to the performance of algae photobioreactor. The experimental was setup in photobioreactor of algae under light intensity 1000-2000 lux, light time exposure (hours): 6, 12, 18, 24, and nitrogen to phosphor nutrient composition 25:75; 75:25; 50:50; 100:0; 0:100. The results shown light exposure affect the production of chlorophyll-a, biomass productivity, and CO2 absorption, which was presented by p-value <0.005. The opposite result indicated that nutrient composition has insignificantly effect to the photobioreactor of algae performance with p-value > 0,005.
Effect of Preoxidant on The Changing of Low Molecular Weight of Natural Organic Matter Hidayah, E. N.; A. T. Agripina; O. H. Cahyonugroho
Nusantara Science and Technology Proceedings International Seminar of Research Month Science and Technology for People Empowerment.
Publisher : Future Science

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Natural organic matter (NOM) is a complex organic compound that have been exist in water sources. The presence of NOM in water, especially the aromatic compound, could trigger the formation of disinfectant by-products (DBPs). Low molecular weight of NOM, one of the characterisctic of organic based on their molecular weight, is quite difficult to be removed in coagulation process. Preoxidation is one the effort to reduce carbon structure of organic matter and it has been known as pretreatment before coagulation process and advanced ones. The objective of this research is to track the changing of low molecular weight of NOM through preoxidation with pottasium permanganaate (KMnO4). Low molecular weight of NOM is presented by synapic acid. Detection of NOM properties was observed quantitatively by using total organic carbon (TOC) and qualitatively by using fourier transform infrared (FTIR). The results shown that KMnO4 could increase the concentration of TOC. According to FTIR analysis, the increasing of TOC concentration is proably due to the transformation of low organic matter into lower organic compound. FTIR showed the increasing of % transmitance of all functional groups of organic matter.
Co-Authors A. A. H. Putro A. T. Agripina A. U. Farahdiba Hidayah, E. N.