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All Journal HAYATI Journal of Biosciences Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences The Journal of Experimental Life Sciences (JELS) Biotropika Natural B AGRIVITA, Journal of Agricultural Science Jurnal Penelitian Pendidikan IPA (JPPIPA) Berkala Penelitian Hayati Bioscientiae, Jurnal ilmu ilmu Biologi Makara Journal of Science Jurnal Pengabdian Masyarakat Biologi dan Sains Jurnal Pendidikan IPA Indonesia
Dian Siswanto
Department Of Biology, Faculty Of Mathematics And Natural Science, Universitas Brawijaya, Malang, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Environmental Science Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology Neuroscience Physics Veterinary

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Identification of Sago-Pulp Amylolytic Bacteria and Its Utilization for Granulated Fertilizer Hasanah, Uswatun; Ardyati, Tri; Siswanto, Dian
The Journal of Experimental Life Science Vol. 11 No. 2 (2021)
Publisher : Graduate School, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jels.2021.011.02.02

Abstract

Previous research stated that bacteria isolated from sago waste from the traditional sago industry in Palopo had the potency to produce amylase. This study aims to confirm the ability of bacteria isolated from sago pulp waste to produce amylase, evaluate the ability of these amylolytic bacteria to produce IAA fix nitrogen, identify selected bacteria, and apply selected bacteria into granules biofertilizers. Bacteria were isolated from sago pulp waste and grown on a 1% starch agar medium. The amylolytic activity was analyzed qualitatively using iodine and quantitatively using the 3,5-Dinitrosalicylic Acid (DNS) method at pH 6. Amylolytic bacteria were analyzed for IAA production using Salkowsky reagent and nitrogen fixation ability through the Serra Kit method. Potential bacteria were identified based on the similarity of the 16S rDNA sequence. The selected bacteria were grown in a 10mL NB medium, and then bacteria were inoculated and air-dried to obtain the granules. The selected bacteria were put into granules and re-isolated using the total plate count (TPC) method. Eight amylolytic bacteria were obtained from sago pulp waste. L1E isolate had the highest amylolytic activity of 1.228 U.mL-1, and L1D isolate had the highest IAA production of 69.8 g.mL-1. Isolate L1E was identified as Alcaligenes faecalis with a 99.45% similarity index, and L1D was identified as Serratia surfactantfaciens with a 99.09% similarity index. Isolate L2G was identified as Alcaligenes aquatilis with a similarity index of 99.8% of the 16S rDNA sequence. The viability of bacteria from granules was 1.41 x 108 CFU.g-1.Keywords: Amylase enzyme, amylolytic bacteria, granulated fertilizer.
Reducing Rice Straw Burning Through Governance and Innovation: Toward Sustainable and Productive Rice Farming in Rural Malang, Indonesia Oraby, Ghada Abd Elsattar Mohammed; Putra, Fadillah; Natsir, M. Halim; Siswanto, Dian
AGRIVITA Journal of Agricultural Science Vol 48, No 2 (2026)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v41i0.5009

Abstract

Rice straw burning in the open field remains a dominant activity in Singosari District, Malang Regency, Indonesia. This has several negative impacts on environmental quality and organism health, yet the implementation continues due to its perceived cost-effectiveness. The results and relevance of this article are based on findings from research conducted using a mixed-method design, including surveys, in-depth interviews, and ethnographic fieldwork. The result also shows that most smallholders (58.1%) still burned rice straw, but most of them (96.8%) would adopt green technology if they received sufficient support and facilitation. The research also indicates that farmers employing alternative methods to burning receive a 10-14% boost in yields, a good sign of what sustainability can do for food production. The major barriers to the adoption of green technology were: ignorance and lack of training (67.7%), cost of equipment (16.1%), non-availability of appropriate technology (9.7%), time constraints (6.5%), and lack of policy implementation. This study suggests that rice straw could be used as animal feed, compost, and biomass energy to mitigate pollution and meet productivity demands.
A Feasibility Study of Bio-Briquettes Production from the Skin and Epidermis Layer of Cassava (Manihot esculenta) as An Alternative Energy Neda Prasiska Kusumawati; Dodyk Pranowo; Dian Siswanto; Wresti L. Anggayasti
Jurnal Penelitian Pendidikan IPA Vol 10 No 6 (2024): June
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i6.7154

Abstract

Unprocessed leftover cassava wastes from the home industries in Pomahan Village in Bojonegoro, East Java, has become a serious problem as a pollutant to the environment. This study examined the quality of bio-briquettes made from cassava skin waste with its epidermis starch as an adhesive agent, or binder. The aim is to assess the quality of the bio-briquettes for alternative energy sources and their suitability from an economic point of view. The utilized research method was a descriptive quantitative approach by measuring water and ash content, calorific value test, and economic feasibility calculation. The results indicated that the highest calorific value of 5337.83 cal/g was obtained from a bio-briquette mix of 50 g cassava skin with 5% epidermis starch binder. This bio-briquette also possesses the lowest water and ash contents of 2.75 and 8%, respectively, compared to other mixtures. The economic feasibility calculation showed a BEP value of 423 kg/ month, B/C Ratio of 6.14-fold, ROI of 30%, and PBI of 0.2 years. In conclusion, cassava-based bio-briquettes are economically promising and environmentally friendly due to their biomass property and help to tackle the environmental problem due to the cassava waste.
Co-Authors Amin Setyo Leksono Ardyati, Ardyati Aris Soewondo Brian Rahardi Budi Waluyo Catur Retnaningdyah Catur Retnaningdyah Dewi Liesnoor Setyowati Dodyk Pranowo Endri Purnomo Ernanin Dyah Wijayanti Estri Laras Arumingtyas Fadillah Putra fatchiyah . Fatchiyah Fatchiyah Gustini Ekowati Irfan Mustafa Kurniawan Sigit Wicaksono, Kurniawan Sigit Lidwina Faraline Triprisila Luchman Hakim M. Halim Natsir Makagoshi, Nobukazu Mertasari, Chaerani Monica, Rosina Muhamad Imam Muhammad Abdullah Nasihah, Mimatun Neda Prasiska Kusumawati Ni'amul Albab, Muhammad Oraby, Ghada Abd Elsattar Mohammed Safitri, Anna Sahiruddin Sahiruddin Serafinah Indriyani Sofy Permana Sri Widyarti Suharjono Suharjono Sukmasari, Pritha Kartika Suksabye, Parinda Thiravetyan, Paitip Tri Ardyati Tridiptasari, Amelia Umi Sa'adah Uswatun Hasanah Wahyu Widoretno Wresti L. Anggayasti Zakaria, Idham Halil Zakiyah, 'Ainun Sayyidah