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Cultivation Strategy for Freshwater Macro- and Micro-Algae as Biomass Stock for Lipid Production Verawaty, Marieska; Melwita, Elda; Apsari, Putri; Mayumi, Mayumi
Journal of Engineering and Technological Sciences Vol 49, No 2 (2017)
Publisher : ITB Journal Publisher, LPPM ITB

In this research, an algae cultivation strategy was studied. Integrating algae cultivation with wastewater treatment is currently seen as one of the most economical ways of producing algae biomass. A combination of an anaerobic baffled reactor (ABR) and a constructed wetland (CW) was applied for treating domestic wastewater with an additional collection tank for improving effluent quality. The effluent produced from the three stages was used as algae cultivation media and suplemented with 10% bold basal medium (BBM). The results showed both micro- and macro-algae growth and their lipid contents were higher when they were grown in effluent-BBM (9:1 v/v) media. The lipid content of the micro-algae mixed culture was 16.5% while for macro-algae Oedogonium sp and Cladophora sp it was 6.90% and 6.75% respectively.

Cultivation Strategy for Freshwater Macro- and Micro-Algae as Biomass Stock for Lipid Production Marieska Verawaty; Elda Melwita; Putri Apsari; Mayumi Mayumi
Journal of Engineering and Technological Sciences Vol. 49 No. 2 (2017)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2017.49.2.8

In this research, an algae cultivation strategy was studied. Integrating algae cultivation with wastewater treatment is currently seen as one of the most economical ways of producing algae biomass. A combination of an anaerobic baffled reactor (ABR) and a constructed wetland (CW) was applied for treating domestic wastewater with an additional collection tank for improving effluent quality. The effluent produced from the three stages was used as algae cultivation media and suplemented with 10% bold basal medium (BBM). The results showed both micro- and macro-algae growth and their lipid contents were higher when they were grown in effluent-BBM (9:1 v/v) media. The lipid content of the micro-algae mixed culture was 16.5% while for macro-algae Oedogonium sp and Cladophora sp it was 6.90% and 6.75% respectively.

Total lactic acid bacteria, phenolic compounds and antioxidant activities of pineapple waste and Indigofera zollingeriana leaves by liquid fermentation Rizki Palupi; Marieska Verawaty; Fitri Nova Liya Lubis; Nova Oktarinah
Jurnal Ilmu-Ilmu Peternakan (Indonesian Journal of Animal Science) Vol 30, No 1 (2020): April 2020
Publisher : Faculty of Animal Science, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jiip.2020.030.01.01

This study aims to determine the best combination of pineapple waste liquid fermentation and Indigofera zollingeriana leaves, which produces the highest amount of lactic acid bacteria, the highest vitamin C content, and total phenols, and the best antioxidant from the combination of the fermentation results. The resulting fermentation product will be used as a natural feed additive in poultry rations. This research was conducted with an experimental method using a Completely Randomized Design (CRD), which consisted of five preparations and four replications. The treatments were combination of pineapple waste and Indigofera zollingeriana leaves: P1 (100% pineapple waste), P2 (98% pineapple waste and 2% Indigofera zollingeriana leaves), P3 (96% pineapple waste and 4% Indigofera zollingeriana leaves), P4 (94% pineapple waste and 6% Indigofera zollingeriana leaves) and P5 (92% pineapple waste and 8% Indigofera zollingeriana leaves). Substrate from each combination of pineapple waste and leaves of Indigofera zollingeriana was fermented with the contribution of 10% of lactic acid bacteria obtained from commercial yogurt and incubated for 72 hours. The parameters in this study consisted of total lactic acid (Lactobacillus bulgarius), the concentration of vitamin C, total phenols, and antioxidant activity. The results showed that the combination of pineapple waste and Indigofera zollingeriana leaves proved significantly (P <0.05) to total lactic acid bacteria (Lactobacillus bulgarius), vitamin C concentration, total phenols and antioxidant activity of the fermented liquid (supernatant) products. In conclusion, the combination of 92% pineapple waste and 8% leaves of Indigofera zollingeriana had the highest total bacterial contribution, produced the highest vitamin C and phenolic compounds, and increased antioxidants.

Pelatihan Pembuatan Bokashi Sebagai Media Tanam Bagi Ibu-ibu PKK Desa Tanjung Pering, Ogan Ilir Marieska Verawaty; Susilawati; Alfian Hasbi; Muharni; Pramoe Wibowo; Herwin Purnomo
Joong-Ki : Jurnal Pengabdian Masyarakat Vol. 1 No. 2: Mei 2022
Publisher : CV. Ulil Albab Corp

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Pelatihan pemanfaatan limbah organik dari sisa rumah tangga, pekarangan dan perkebunan menjadi bokashi sebagai media tanam berbagai jenis sayuran, buah-buahan dan tanaman telah dilaksanakan di Desa Tanjung Pering, Ogan Ilir. Kegiatan ini bertujuan memberikan wawasan dan keterampilan bagi peserta dalam memanfaatkan limbah menjadi pupuk yang bernilai ekonomi dalam menunjang sektor pertanian yang berkelanjutan. Kegiatan ini merupakan kerjasama Universitas Sriwijaya dengan Dinas Kehutanan Provinsi Sumatera Selatan (Seksi Penyuluhan dan Pemberdayaan Masyarakat dan Seksi Pengendalian Kebakaran Hutan dan Lahan). Kegiatan ini merupakan bagian dari Program Pengabdian kepada Masyarakat (PPM) oleh Unsri kepada desa binaan. Melalui kegiatan ini diharapkan masyarakat mulai memanfaatkan limbah di lingkungan masyarakat menjadi produk yang bernilai ekonomi.

Berat Larva Spodoptera litura dan Luas Daun Cabai yang Dimakannya setelah Diaplikasikan Berbagai Isolat Jamur Entomopatogen Mimma Gustianingtyas; Siti Herlinda; Erise Anggraini; Arsi Arsi; Suwandi Suwandi; Hasbi Hasbi; Marieska Verawaty; Arum Setiawan; Elfita Elfita; Suparman Suparman; Harman Hamidson; Khodijah Khodijah
Seminar Nasional Lahan Suboptimal 2020: Prosiding Seminar Nasional Lahan Suboptimal ke-8 “Komoditas Sumber Pangan untuk Meningkatkan K
Publisher : Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya

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Gustianingtyas M, Herlinda S, Anggraini E, Arsi A, Suwandi S, Hasbi H, Verawaty M, Setiawan A, Elfita E, Suparman S, Hamidson H, Khodijah K. 2020. Weight of spodoptera litura larvae and chili leaf area eaten after treated with some entomopathogenic fungal isolates. In: Herlinda S et al. (Eds.), Prosiding Seminar Nasional Lahan Suboptimal ke-8 Tahun 2020, Palembang 20 Oktober 2020. pp. xx. Palembang: Penerbit & Percetakan Universitas Sriwijaya (UNSRI).Spodoptera litura is one of the important insect pests on chili in Indonesia that attacks the vegetative and generative phases. This study aimed to observe the effect of the entomopathogenic fungal isolates explored from the low and highlands on the decrease in feed and weight of S. litura larvae. The experiment was arranged in a Randomized Block Design (RBD) with 52 treatments consisted of 29 isolate of Beauveria bassiana and 23 isolate of Metarhizium spp. applied on 25 second instar of S. litura per replicate. The results showed that the body weight of larvae applied to B. bassiana isolates on the first day of observation was significantly different from the control. The body weight of larvae on the first day of observation of BJgTs isolates (0.30 g) and Bby (0.31 g) was significantly different and lower than the other treatments. The body weight of larvae applied isolate Metarhizium spp. significantly different from the controls. The body weight of larvae on the 9 day applied isolates MPdMs2 (4.74) and MKbTp2 (4.63) was significantly different from other treatments, the leaf area eaten was significantly different from the 7 day to the 12 day of observation. From this research, it can be concluded that B. bassiana isolates coded BJgTs and Bby, isolates Metarhizium spp. MPdMs2 and MKbTp2 codes are isolates that have an effect on reducing feed and larvae weight and cause changes in behavior of S. litura larvae.

ANTIOXIDANT ACTIVITY LEAVES KATIMAHA (Kleinhovia hospita L.) Nova Elda Utami; Salni Salni; Marieska Verawaty
BIOVALENTIA: Biological Research Journal Vol. 8 No. 1 (2022)
Publisher : Biology Department, Faculty of Mathematics and Natural Sciences, Sriwijaya University

The free radicals that people face in their daily activities require humans to get additional antioxidants from the outside. To overcome this problem, it is necessary to look for many sources of natural antioxidants considering the need for antioxidants that are increasingly needed Katimaha (K. hospita L.) is believed to have many benefits in the field of medicine. Therefore, katimaha has the potential to be used as a source of natural antioxidants. The research methods carried out were refining katimaha leaf simplicia, extraction, fractionation, antioxidant activity test with TLC plate, purification, determination of compound class, and antioxidant activity test using the DPPH method. The results showed that the active fraction of Katimaha leaf was the n-hexane fraction and the ethyl acetate fraction. Column chromatography on the active fraction found six pure eluates that had antioxidant activity, namely N1, N3, N5, E1, E2, and E4. Groups of compounds N1, N3, N5, E1 are terpenoids, group E2 eluates are tannins, while E3 eluates are flavonoid compounds. The pure eluate antioxidant activity test using the DPPH method obtained IC50 values of N1 are 40,142 ppm, N3 80,057 ppm, N5 271,643 ppm and E1 89,16 ppm, E2 124.91 ppm and E4 52.51 ppm.

Catalytic Desulfurization of Benzothiophene Using Keggin Type Polyoxometalates as catalyst Aldes Lesbani; Arianti Marpaung; Marieska Verawaty; Hesti Rizki Amalia; Risfidian Mohadi
The Journal of Pure and Applied Chemistry Research Vol 4, No 1 (2015)
Publisher : Chemistry Department, The University of Brawijaya

Performance of catalytic desulfurization of benzothiophen (BT) was studied using polyoxometalates as catalyst. Polyoxometalates H3[a-PW12O40] and H4[a-SiW12O40], have different heteroatom in Keggin structure and catalytic activities. Polyoxometalates H3[a-PW12O40] and H4[a-SiW12O40] have high crystallinity with homogeneous distribution particles. Desulfurization of BT using polyoxometalates H3[a-PW12O40] and H4[a-SiW12O40] resulted % conversion up to 99% for 3 h reaction time and at temperature 40 oC. Application of polyoxometalates H3[a-PW12O40] and H4[a-SiW12O40] for crude oil desulfurization showed % conversion of 4-88%. The main functional groups of polyoxometalates still retained after catalytic desulfurization indicated the stability of polyoxometalate compounds

Calcium Oxide Decomposed From Chicken’s and Goat’s Bones as Catalyst For Converting Discarded Cooking Oil to be Biodiesel Aldes Lesbani; Yosine Susi; Marieska Verawaty; Risfidian Mohadi
Aceh International Journal of Science and Technology Vol 4, No 1 (2015): April 2015
Publisher : Graduate Program of Syiah Kuala University

Thermal decomposition of calcium oxide from chicken’s (Gallus gallus domesticus) and goat’s (Capra Hircus Aegragus) bones was prepared at temperature variations of 400, 500, 800, 900, 1000, and 1100 oC respectively. X-ray diffractometer (XRD), FT-IR and SEM were used for calcium oxide characterization. XRD diffraction pattern of the bone’s after thermal decomposition at 1100oC has similarity to the XRD standard diffraction pattern from Joint Committee on Powder Diffraction Standard (JCPDS). Diffractions of 2q values being used are 34.2o, 37.3o, 58.3o, 64.1o, and 67.3 o. Ca-O presence in the samples was detected by FT-IR characterization at wavenumber of 354,90 cm-1. SEM profile show reducing size of bones after decomposition in both chicken’s and goat’s bones. Furthermore, the prepared calcium oxide was applied for biodiesel synthesis from discarded cooking oil through transesterification reaction. By applying the catalysts decomposed from chicken’s and goat’s bones, the biodiesel product showed characteristics as follows: biodiesel applied the chicken’s bone catalyst has fatty acid number of 0.56 mg/KOH, iod number of 22.41 g I2/100 g KOH, density of 0.88 g/cm3 and viscosity of 5.91 mm2/s, while biodiesel applied the goat’s bone catalyst has 0.56 mg/KOH, iod number of 21.57 g I2/100 g KOH, density of 0.88 g/cm3 and viscosity of 6.34 mm2/s. Those biodiesel’s characteristic values meet the National Standard of Indonesia (SNI) for biodiesel.

KERAJINAN TANGAN HERBARIUM DI DESA PULAU SEMAMBU KECAMATAN INDERALAYA KABUPATEN OGAN ILIR Marieska Verawaty
Aptekmas Jurnal Pengabdian pada Masyarakat Vol 2 No 3 (2019): APTEKMAS Volume 2 Nomor 3 2019
Publisher : Politeknik Negeri Sriwijaya

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Activity of Community service (PPM) as part of The Tri Dharma Perguruan Tinggi has been done on October 2015. The activity was about "The development of women’s creativity on production of various handicrafts made from flowers and dried plants by herbarium techniques” and was conducted on Semambu Island Village that is located on The North Indralaya District, Ogan Ilir Regency. This activity was in line with the home scale creative business development program of Sriwijaya University as an effort to improve the family income through the formation, fostering and assistance of small and medium-sized businesses, this activity is primarily targeted house-wives and young women in rural areas as an effort to support their family economy. Empowerment activities in this area are expected to have a positive impact on the development of creativity with economic value that also contained some of education, research and community service values. The activities were done by demonstration of making herbarium and handicrafts, and then it was followed by monitoring and evaluation. The utilisation of plants, flowers, and leaves for producing more high-value and economical handicrafts products by the herbarium can increase the community income and welfare.

Pelatihan Pembuatan Bokashi Sebagai Media Tanam Bagi Ibu-ibu PKK Desa Tanjung Pering, Ogan Ilir Marieska Verawaty; Susilawati; Alfian Hasbi; Muharni; Pramoe Wibowo; Herwin Purnomo
Joong-Ki : Jurnal Pengabdian Masyarakat Vol. 1 No. 2: Mei 2022
Publisher : CV. Ulil Albab Corp

Show Abstract | Download Original | Original Source | Check in Google Scholar

Pelatihan pemanfaatan limbah organik dari sisa rumah tangga, pekarangan dan perkebunan menjadi bokashi sebagai media tanam berbagai jenis sayuran, buah-buahan dan tanaman telah dilaksanakan di Desa Tanjung Pering, Ogan Ilir. Kegiatan ini bertujuan memberikan wawasan dan keterampilan bagi peserta dalam memanfaatkan limbah menjadi pupuk yang bernilai ekonomi dalam menunjang sektor pertanian yang berkelanjutan. Kegiatan ini merupakan kerjasama Universitas Sriwijaya dengan Dinas Kehutanan Provinsi Sumatera Selatan (Seksi Penyuluhan dan Pemberdayaan Masyarakat dan Seksi Pengendalian Kebakaran Hutan dan Lahan). Kegiatan ini merupakan bagian dari Program Pengabdian kepada Masyarakat (PPM) oleh Unsri kepada desa binaan. Melalui kegiatan ini diharapkan masyarakat mulai memanfaatkan limbah di lingkungan masyarakat menjadi produk yang bernilai ekonomi.

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