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All Journal Reaktor International Journal of Renewable Energy Development Eksergi: Chemical Engineering Journal International Journal of Renewable Energy Development
Muhamad Maulana Azimatun Nur
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Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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Journal : International Journal of Renewable Energy Development

 1 
Cultivation of Chlorella sp. as Biofuel Sources in Palm Oil Mill Effluent (POME) Hadiyanto, H; Azimatun Nur, Muhamad Maulana; Hartanto, Ganang Dwi
International Journal of Renewable Energy Development Vol 1, No 2 (2012): July 2012
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.1.2.45-49

Abstract

Renewable energy is essential and vital aspect for development in Indonesia especially less oil reserve for coming 15 years. Biodiesel has received much attention as renewable energy in recent years. One of potential biodiesel is produced from microalgae. Due to high content of nutrients in Palm Oil Mill Effluent (POME), this waste is a potential for nutrient growth for microalgae. Chlorella is one of high potential for biodiesel since it has high lipid content (20-30%). The objective of the research is to determine growth rate and biomass productivity in Chlorella Sp cultured in POME. Chlorella Sp was cultured in 20%, 50%, 70% POME using urea concentration 0.1gr/L (low nitrogen source) and 1gr/l (high nitrogen source) at flask disk, pH 6.8-7.2; aerated using aquarium pump and fluorescence lamp 3000-6000 lux as light. Medium was measured using spectrophotometer Optima Sp-300 OD at 680 wave length in 15 days to calculate specific growth rate. At end of cultivation, Chlorella sp was filtered and measured as dry weight. Result indicated that Chlorella sp at 50% POME 1gr/L urea showed higher specific growth rate (0.066/day). Factor affecting growth rate of microalgae is CNP ratio, POME concentration, and urea concentration.
VCO Production from Fresh Old Coconut Bunch by Circulating and Pumping Method Azimatun Nur, Muhamad Maulana; Mulyono, Joko; Soetrisnanto, Danny
International Journal of Renewable Energy Development Vol 1, No 1 (2012): February 2012
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.1.1.28-31

Abstract

VCO (Virgin Coconut Oil) is one of coco-diesel source, made without high heating and chemicals. Commercial processes production, such fermentation and centrifugation usually need more time and expensive in cost and investment. Circulating by pumping through a nozzle is a new process method invented to produce VCO. The process followed by coalescence method, breaking emulsion by hitting particles through pipe and nozzle. The problem of this method was that the product gave lower yield than another method and not yet qualified. This research was purposed to discover correlation between pressure and time of circulation variables against yield and content (FFA, Peroxide, water content) represented by SNI (national Indonesian standard). Producing VCO initiated by producing coconut milk from fresh old coconut, then each 1 litre milk were pumped through the pipe and nozzle with variation of circulations pressures and time. The results were decanted for 10 hours so the oil and water would be separated. The oil at upper layer was taken as final product. Then the last step was analysed the oils and oil cake (blondo). The results showed that pressure and time of circulating variables gave impact to the yield. On optimum variables, 2 atm pressure and 15 minutes of circulating gave better results with 97% yield. This operating variables also affecting oil quality. The minimum water content is 0.1%, free fatty acid is 0.18% and peroxide value is 2 mg/kg eq. The results showed that all of parameters meet the SNI standard.
Co-Authors Achmad, Zubaidi Adi Kurniawan Al Maqsidi, Muhammad Ariq Annisaturraihan A Bety Alfitamara Danny Soetrisnanto Dellarohita, Shinta Justicia Dwi Nur Afni Ganang Dwi Hartanto Ganang Dwi Hartanto H Hadiyanto H Hadiyanto Hadi, Faizah Halim Nur Aziz Suwardi Joko Mulyono N Islamy Putra Putri, Wilda Ayu Retno Pamularsih Sheila Alodia Sri Wahyu Murni Syakira, Salsabila Fara Tutik Muji Setyoningrum Tutik Muji Setyoningrum Vinka Azzah Prananda Viska A.W. Wibiana Wulan Nandari