#TITLE_ALTERNATIVE#

• Main Author: NIKOLAUS DHARMAWAN DHARSONO NIM : 20716307
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/29635
• Institution: Institut Teknologi Bandung

Microalgae are photosynthethic microorganisms which have ability to use sunlight and carbon <br /> <br /> dioxide to produce biomass and secondary metabolites, secondary metabolites in microalgae <br /> <br /> are alkaloid, steroid, flavonoid. One of the most widely known microalgae is Spirulina sp. , <br /> <br /> microalgae which is bluish green, a spiral single-celled shape, and has blue pigments <br /> <br /> phycocyanin. Previous research was conducted to increase the production of Spirulina sp. by <br /> <br /> increasing CO2 solubility using NaOH and monoethanolamine (MEA). Previous study, results <br /> <br /> were not so significant so further research is needed to increase CO2 solubility and to optimize <br /> <br /> monoethanolamine concentration. This research was conducted to optimize CO2 absorbent <br /> <br /> which increase the growth of Spirulina sp biomass. with CO2 absorbent KOH, <br /> <br /> monoethanolamine, piperazine using response surface method with factorial design and boxbehnken design. Factorial design result is first order equation (R2 = 99.77%, R2 prediction= - <br /> <br /> %) this equation cannot explain increase in biomass because lack of fit. Box-Behnken design <br /> <br /> result is second order equation (R2 = 95.37%, R <br /> <br /> 2 <br /> <br /> prediciton= 87.63%) without lack of fit ( p <br /> <br /> value lack of fit > 0.05 ). Biomass increased 0.104 g/100 mL was obtained from respone <br /> <br /> optimizer minitab with monoethanolamine concentration 1.0265 mmol/L, KOH concentration <br /> <br /> 20 mmol/L, and piperazine concentration 0.3899 mmol/L. <br />