Sintesis Karbon Aktif Berbahan Dasar Mikroalga Chlorella vulgaris Menggunakan Aktivator KOH dan Iradiasi Gelombang Mikro


  • Agung Sukoyo Program Magister Keteknikan Pertanian Fakultas Teknologi Pertanian Universitas Brawijaya
  • Gunomo Djoyowasito Program Studi Keteknikan Pertanian Fakultas Teknologi Pertanian Universitas Brawijaya
  • Yusuf Wibisono Bioprocess Engineering, Brawijaya University



Activated Carbon, Microalgae, Chlorella Vulgaris, Microwave Iradiation, KOH


Microalgae Chlorella vulgaris has been used as a raw material in the synthesis of powdered activated carbon. Dry microalgae was pyrolyzed at a temperature of 500oC for 30 minutes to obtain microalgae charcoal. The combination of chemical activation treatment using KOH with concentrations of 10, 30, and 50% assisted by microwave irradiation have been used to prepare activated carbon. The properties of activated carbon were analyzed included yield, ash content, volatile substance content, pure activated carbon content, iodine solution absorbency, BET surface area and activated carbon imaging using SEM EDX. The results showed that Chlorella vulgaris microalgae has a carbon element content of 16.09% which has the potential to be used as an activated carbon feedstock. The microalgae activated carbon produced has a range of yield of 27.60-48.64%, ash content 27.98-44.23%, volatile substance content 23.08-30.92%, pure activated carbon content 32.69-41.10%, absorption of iodine solution 189.46 - 260.23 mg/g, surface area BET was obtained at 34,933 m² / g, with a pore average of 46.59 nm in the sample with the highest iodine absorption. Activation using microwave irradiation and higher KOH concentration, i.e. 50%, can reduce the yield and an ash content of activated carbon, on the other hand, increase the level of volatile substances and iodine absorption. SEM EDX imaging results show the formation of micropores on the surface of microalgae activated carbon, however the impurities promotes the deterioration of surface area and lowering the absorption performance of microalgae activated carbon.

Author Biographies

Agung Sukoyo, Program Magister Keteknikan Pertanian Fakultas Teknologi Pertanian Universitas Brawijaya

Program Magister Keteknikan Pertanian

Fakultas Teknologi Pertanian

Universitas Brawijaya

Gunomo Djoyowasito, Program Studi Keteknikan Pertanian Fakultas Teknologi Pertanian Universitas Brawijaya

Associate Professor

Program Studi Keteknikan Pertanian

Fakultas Teknologi Pertanian

Universitas Brawijaya

Yusuf Wibisono, Bioprocess Engineering, Brawijaya University

Assistant Professor

Jurusan Keteknikan Pertanian

Fakultas Teknologi Pertanian

Universitas Brawijaya


WIBISONO, Y., Biomaterial dan Bioproduk, UB Press, Malang, 2017.

BROWN, R.C., BROWN, T.R., Biorenewable Resources – Engineering New Products from Agriculture (second ed). Oxford UK: John Wiley & Sons, 2014.

DEVIANTO, L.A., APRILIA, D.N., INDRIANI D.W., SUKARNI, S., SUMARLAN, S.H., WIBISONO, Y., “Marine microalgae Nannochloropsis oculata biomass harvesting using ultrafiltration in cross-flow modeâ€, In: IOP Conference Series: Earth and Environmental Science, 131 (1), 012042, 2018.

YAN, C., ZHU, L., WANG, Y., “Photosynthetic CO2 uptake by microalgae for biogas upgrading and simultaneously biogas slurry decontamination by using of microalgae photobioreactor under various light wavelengths, light intensities, and photoperiodsâ€, Applied Energy, v. 178, pp. 9–18, Sept. 2016.

CHEAH, W.Y., SHOW, P.L., CHANG, J.S., LING, T.C., JUAN, J.C.,â€Biosequestration ofatmospheric CO2 and flue gas-containing CO2 by microalgaeâ€, Bioresource Technology, v.184, pp. 190–201, May 2015.

JIANG, L., LUO, S., FAN, X., YANG, Z., GUO, R., “Biomass and lipid production ofmarine microalgae using municipal wastewater and high concentration of CO2â€, Applied Energy, v.88, pp. 3336–3341, Oct. 2011.

VANTHOOR-KOOPMANS, M., WIJFFELS, R.H., BARBOSA, M.J., EPPINK, M.H.M., “Biorefinery of microalgae for food and fuelâ€, Bioresource Technology, v.135, pp. 142-149, May 2013.

YEN, H.W., HU, I.C., CHEN, C.Y., HO, S.H. LEE, D.J., CHANG, J.S., “Microalgae-based biorefinery – From biofuels to natural productsâ€, Bioresource Technology, v.135, pp. 166-174, May 2013.

ZHU, Y., ALBRECHT, K.O., ELLIOTT, D.C., HALLEN, R.T., JONES, S.B., “Development of hydrothermal liquefaction and upgrading technologies for lipid-extracted algae conversion to liquid fuelsâ€, Algal Research, v.2, pp. 455-464, Oct. 2013.

WANG, K., BROWN, R.C., HOMSY, S., MARTINEZ, L., SIDHU, S.S., “Fast pyrolysis of microalgae remnants in a fluidized bed reactor for bio-oil and biochar productionâ€, Bioresource Technology, v.127, pp. 494-499, Jan. 2013.

ALZATE, M.E., MUNOZ, R., ROGALLA, F., FDZ-POLANCO, F., PEREZ-ELVIRA, S.I., “Biochemical methan potential of microalgae biomass after lipid extractionâ€, Chemical Engineering journal, v.243, pp. 405–410, May 2014.

CHENG, J., HUANG, R., YU, T., LI, T., ZHOU, J., CEN, K., “Biodiesel production from lipids in wet microalgae with microwave irradiation and bio-crude production from algal residue through hydrothermal liquefactionâ€, Bioresource Technology, v.151, pp. 415-418, Jan. 2014.

RAMOS-SUAREZ, J.L., CARRERAS, N., “Use of microalgae residues for biogas productionâ€, Chemical Engineering Journal, v.242, pp. 86-95, Apr. 2014.

WIBISONO, Y., SUCIPTO, S., PERDANI, C.G., ASTUTI, R., DAHLAN, M., “Halal compliance on drinking water industries: a future perspectiveâ€, In: Proceeding of the 3rd International Halal Conference (INHAC2016), pp.555 – 564, Springer, Singapore, Feb. 2018.

PRATIWI, M.K., MASYRIFAH, L., HAWA L.C., DEWI, S.R., IZZA, N., ARGO, B.D., SUCIPTO, S., WIBISONO, Y. “Enhanced antibiofouling properties of chitosan-based membranes by coating and blending of Moringa oleifera L extractâ€, In: IOP Conference Series: Material Science and Engineering, v.434 (1), 012191, 2018.

DEWI, R., WARDANA, I.N.G., HAMIDI, N., “Pengaruh Daya Penyinaran Mikro Terhadap karakteris-tik Pembakaran Droplet Minyak Jarak Pagarâ€, Jurnal Rekayasa Mesin, v.3, pp. 305-316, 2012.