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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

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

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.

Effect of Bicarbonate, Iron, and Salt, on Lipid Productivity of Chlorella sp. Extracted by Osmotic Shock Method Muhamad Maulana Azimatun Nur
Eksergi Vol 11, No 2
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v11i2.366

Fossil energy depletion in Indonesia can not be neglected. It is needed renewable energy that environmental friendly and meets demand consumption. One of promising biofuel in Indonesia is biodiesel. However lack of feedstock is main problem due to increasing of customer needs. Chlorella sp. is kind of microalgae that potential for biodiesel source. This research is purposed to optimize influence of bicarbonate, iron, and salt in growth, biomass, and lipid productivity of Chlorella sp. The research was done in 2^3 factorial design in 6 days. Cultivation was maintained in pH 6,2-7,4 and 6000 lux light intensity. Extraction was done by osmotic shock method using wet biomass. Result indicates that addition of bicarbonate and iron give possitive effect on lipid productivity. Addition of salt give possitive effect on biomass and growth rate.

Evaluation of C/N Ratio in Spirulina platensis Cultivation using Molasses Addition as Organic Carbon Source Tutik Muji Setyoningrum; Viska A.W.; Annisaturraihan A; N Islamy Putra; Muhamad Maulana Azimatun Nur
Eksergi Vol 11, No 2
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v11i2.375

Growth of Spirulina platensis requiers nitrogen, phosphate, and carbon. Urea is used as source of nitrogen, TSP as source of phosphate, and sodium bicarbonate (NaHCO3) as source of carbon. The purpose of this research was to evaluate C:N ratio of medium using different concentration of molase and urea addition as replacement of commercial medium. Spirulina platensis was cultivated as a control consist of 1500 ppm NaHCO3 as source of carbon, 80 ppm urea as source oh nitrogen, 20 ppm TSP (Triple Super Phosphate) as source of phosphate, 1 ppm FeCl3 and 50 µg/l B12 vitamin as source of micronutrients. Spirulina platensis was cultivated in 2-liter of erlenmeyer flask with variation composition of urea and molasses in growth media by adding 20% (w/w) control medium. Urea was varied between 0; 16; and 80 mg L-1, molasses was varied at the level of 0,1-0,9 g L-1. Cultivation was maintained in pH 9-10, light intensity 6000-7000 lux and 280C. Mini aerator pump is used as a medium stirrer. The best result were obtained at the medium varied of 0,1 g L-1 and 16 ppm of urea with growth rate of 0.230 day-1 , C:N ratio 6.8, and dry biomass of 0.333 g L-1.

Effect of particle sizes and sodium hydroxide concentrations on silica extraction from minerals obtained in Kalirejo village, Kokap, Kulonprogo, Yogyakarta Tutik Muji Setyoningrum; Wibiana Wulan Nandari; Sri Wahyu Murni; Muhamad Maulana Azimatun Nur
Eksergi Vol 18, No 1 (2021)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v0i0.4576

Silica is mainly used in the production of rubber, glass, cement, glass, ceramics, paper, cosmetics, electronics, paintings, healthcare and other industries. Kalirejo village has a potential abundant resource of silica minerals. However, to refine it, high cost of extraction should be done to obtain high purity of silica. Different refining methods influence different purity of the silica. The purpose of this research was to study the refining process of mineral rock silica from Kalirejo village, Kokap, Kulonprogo by emplying simple and cheap solid-liquid extraction. Extraction was done by varying the particle size at 100 - 200 mesh, while NaOH concentration was varied in 0.5 N to 5 N. Results showed that minerals taken from Kalirejo village was dominated by silica (23%). The largest extract (4.89 gram) was obtained at 200 mesh and using NaOH 5 N with yield of 15.07%. Higher NaOH and higher particle size enhanced the extraction yield. This finding could help small communities in Kalirejo village to enhance the quality of silica by employing simple and cheap extraction process.

Potency of Microalgae as Source of Functional Food in Indonesia (Overview) Muhamad Maulana Azimatun Nur
Eksergi Vol 11, No 2
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v11i2.363

Malnutrition in Indonesia continues to increase. It is needed to develop functional food source that is capable to be produced in rapid, feasible, sustainable, and meets the nutritional needs for the country. Microalgae is a type of single-celled plants, live in water by using photosynthesis to produce biomass. Microalgae such as Spirulina platensis has a high protein content. It also contains vitamins and pigments that is useful to the body. The potential of microalgae production in Indonesia is high considering that Indonesia passed the equator and has a supporting environment. Trends in the future, it is expected Indonesia could produce microalgae at high mass scale, at a cheap price and can be applied in everyday life.

Production of briquettes from Indonesia agricultural biomass waste by using pyrolysis process and comparing the characteristics Sri Wahyu Murni; Tutik Muji Setyoningrum; Muhamad Maulana Azimatun Nur
Eksergi Vol 18, No 1 (2021)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v0i0.4572

Indonesia biomass waste is a potential feedstock as a source of renewable energy since it can be converted into carcoal briquettes. However, the production of the briquettes using pyrolysis process using the agricultural waste was lacking. In this research, briquette was made from palm shells, corncob and soybean stem wood due to its high availability and have high cellulose content. The purpose of this research was to produce briquettes from three kind of raw materials by employing pyrolysis process and compared the characteristics. The briquette was made from different type of raw materials (palm shells, corncob and soybean stem) and the concentration of binder : 3-7 %. Pyrolysis was done at 500 °C, and 100 kg / cm2 of pressing pressure. Results showed that, the best charcoal briquette was achieved from palm shells by using 5% binder, which resulted 4,1% moisture content, 3.4% ash content, 15% volatile matter content, 77.5% carbon content, 7075 cal/g calorific value and 1.4 kg/cm2 compresive strength. It is found that the concentration of binder and raw material influenced the quality of the briquettes. In overall, the production of the briquettes by employing pyrolysis method could meet the standard.

Potensi Spirulina platensis sebagai sumber kosmetik dan bioplastik (review) Muhamad Maulana Azimatun Nur; Tutik Muji Setyoningrum; Halim Nur Aziz Suwardi; Bety Alfitamara; Adi Kurniawan; Vinka Azzah Prananda; Dwi Nur Afni; Sheila Alodia; Retno Pamularsih
Eksergi Vol 18, No 2 (2021)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v18i2.5660

Spirulina plantesis is a cyanobacteria that has many purposes such as for cosmetics, and food industry. In addition, Spirulina platensis can accumulate polyhydroxybutyrate (PHB), a type of bioplastic. This review discussed the potency of Spirulina platensis as a source of bioplastics and cosmetics. From the review, Spirulina contained bioactive compound, C-phycocyanin, which can inhibit cell damage and is very potential to be applied for cosmetics. The PHB content in Spirulina tends to be small compared to other microalgae. To reduce the cost of PHB from Spirulina, the biorefinery concept can be applied, by recovery the bioactive components (C-phycocyanin), while the residue can be used as a source of PHB.

Cultivation of Chlorella sp. as Biofuel Sources in Palm Oil Mill Effluent (POME) H Hadiyanto; Muhamad Maulana Azimatun Nur; Ganang Dwi Hartanto
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.2012.3802

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.

Pengaruh Pelarut, Rasio Pelarut, dan Waktu Ekstraksi Terhadap Astaxanthin dari Haematococcus sp. dengan Bantuan Ultrasound Assisted Extraction Putri, Wilda Ayu; Al Maqsidi, Muhammad Ariq; Achmad, Zubaidi; Hadi, Faizah; Nur, Muhamad Maulana Azimatun
Eksergi Vol 20, No 3 (2023)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v20i3.10733

Indonesia merupakan negara kepulauan dengan keanekaragaman hayati sehingga memilliki potensi bagi perairan Indonesia untuk mikroalga dapat tumbuh dan berkembang. Mikroalga Haematococcus sp. dikenal mengandung senyawa karotenoid, khususnya senyawa astaxanthin. Astaxanthin berkhasiat sebagai antioksidan yang dapat dimanfaatkan sebagai suplemen kesehatan. Penelitian ini bertujuan untuk mengetahui pengaruh jenis pelarut, volume pelarut, dan lama waktu ekstraksi terhadap kadar astaxanthin. Ekstraksi dilakukan dengan metode Ultrasound Assisted Extraction (UAE). Penelitian ini menggunakan metode percobaan dengan Rancangan Acak Lengkap (RAL) factorial dengan tiga variabel bebas yaitu jenis pelarut, volume pelarut dan waktu ekstraksi pada proses ekstraksi. Pada penelitian ini dilakukan analisis kadar astaxanthin dalam Haematococcus sp.yang diperoleh dari hasil kultivasi sendiri, kemudian dilakukan pengukuran kadar astaxanthin menggunakan spektrofotometri UV-Vis pada panjang gelombang 478 nm. Hasil pengukuran menunjukkan kadar astaxanthin tertinggi pada variasi pelarut aseton dengan volume 10 ml lama waktu 25 menit sebesar 0,0677%.

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