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All Journal HAYATI Journal of Biosciences Microbiology Indonesia Jurnal Purifikasi Current Research on Biosciences and Biotechnology
SITI KHODIJAH CHAERUN
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Environmental Science Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology

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Tempeh Waste as a Natural, Economical Carbon and Nutrient Source: ED-XRF and NCS Study SITI KHODIJAH CHAERUN
HAYATI Journal of Biosciences Vol. 16 No. 3 (2009): September 2009
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (29.295 KB) | DOI: 10.4308/hjb.16.3.120

Abstract

The purpose of this study was to determine the elemental composition of three types of waste from tempeh production. They are soybean hull “tempeh waste” after dehulling soybeans, tempeh wastewater after soaking dehulled soybeans in water for 24 h, and tempeh wastewater after boiling dehulled soybeans in water for 30 min. By using ED-XRF analyzer, it was revealed that tempeh waste contained Mg, Si, P, S, K, Ca, Mn, Fe, and Zn. The highest elemental content was K, followed by Ca, P, and Mg. NCS analysis showed that tempeh waste was composed of C, N, and S with C/N ratio of 11.20. The present study provides evidence that both tempeh waste and wastewater are rich in carbon and nutrient contents, thus their potential for both inorganic and organic nutrient and carbon sources for microbial growth in bioremediation or as natural NPK fertilizers is promising. Key words: bioremediation, NPK fertilizer, tempeh wastewater, tempeh waste
QUANTITATIVE ANALYSIS OF NITROGEN COMPOUNDS IN PADDY FIELDS AMMENDED WITH UREA FERTILIZER Siti Khodijah Chaerun
Purifikasi Vol 8 No 1 (2007): Jurnal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Environmental and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25983806.v8.i1.119

Abstract

A field experiment was conducted to quantitatively analyze nitrogen (N) compounds as both inorganic and organic N (measured as total Kjeldahl N (TKN), NH4+-N, NO2--N, NO3--N, organic N and total N) and N pollution loading (measured as total N load) in paddy fields after the application of various dosages of urea [CO(NH2)2] fertilizer. Three urea levels (0, 200, and 300 kg urea/ha) and IR64 rice were used in a factorial designed experiments. The irrigation water in both outlet and inlet water flow was sampled after urea surface application at 0, 15 and 35 days after planting (DAP) and those of N concentrations were determined. In general, the urea fertilizer application of three N levels showed significantly increased inorganic and organic N concentrations in outlet irrigation water (P < 0,05) but did not increase total N load (P > 0,05) compared to inlet irrigation water. When no urea fertilizer was applied (0 kg urea/ha), high N concentration was measured in irrigation water, indicating that irrigated water system had carried N compounds other than urea fertilizer applied. All the N compounds increased significantly except for NO2--N and total N at 0 kg urea/ha, NO2--N and organic N at 200 kg urea/ha, and TKN at 300 kg urea/ha, which were not significantly different between outlet and inlet irrigation water (P > 0,05). These results revealed that although the three urea fertilizer application levels did not increase N loading, they have a significant effect on both inorganic and organic N concentrations in surface water runoff, thus eventually entering and polluting the water receiving bodies with the subsequent increase of eutrophication.
PHYSICOCHEMICAL CHARACTERIZATION OF PADDY SOILS CONTAMINATED WITH INDUSTRIAL WASTEWATERS: IMPLICATIONS FOR BIOREMEDIATION Siti Khodijah Chaerun
Purifikasi Vol 10 No 2 (2009): Jurnal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Environmental and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25983806.v10.i2.169

Abstract

Concern has mounted over recent decades regarding the paddy soils located in Rancaekek, Bandung, West Java, Indonesia that have been heavily polluted by industrial effluents for many years. Recent efforts to remediate the heavily polluted sites have failed due to incomplete understanding of the site characteristics. Hence, this study dealt with the physicochemical characterization of these soils to acquire a better understanding of the physicochemical impacts and eventually improve their soil quality so that they would again be suitable for agriculture. The polluted soils contained much higher salt concentrations, higher salinity, and elevated levels of heavy metals (Cr, Mn, Cu and Zn) than unpolluted soils at control sites. However, no significant difference was observed in the mean of pH between all sites. Maximum water holding capacity and cation exchange capacity (Na and K) in polluted soils were significantly greater than those in unpolluted soils. Moreover, the polluted soils had higher contents of N, P, K, S, organic C, and lower C/N ratio than unpolluted soils. These results indicate that the industrial wastewaters-contaminated paddy soils have major changes in their physicochemical characteristics, therefore being informative to the development of bioremediation strategies of these soils.
Influence of indigenous mixotrophic bacteria on pyrite surface chemistry: Implications for bioflotation Edy Sanwani; Nuslia Bayangkara Lamandhi; Halimatul Husni; Siti Khodijah Chaerun; Widi Astuti; Fika Rofiek Mufakhir
Microbiology Indonesia Vol. 14 No. 1 (2020): March 2020
Publisher : Indonesian Society for microbiology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4941.336 KB) | DOI: 10.5454/mi.14.1.1

Abstract

Given the low-cost and eco-friendly method, biotechnology has been widely utilized in industries as an alternative for physical and chemical processes, including in the biomining process (e.g., bioflotation and biobeneficiation). However, the use of biochemical reagent, which is selective for certain minerals, has not been well studied. This research was aimed to investigate the potential use of biosurfactant-producing mixotrophic bacteria as an alternative to chemical reagents during bioflotation and biobeneficiation process. Thirteen bacterial strains were investigated for their ability to produce biosurfactants and their effects on the surface properties of pyrite minerals. Bacteria-pyrite interaction experimental results showed that pyrite surface properties became more hydrophilic in the experimental systems inoculated with bacteria adapted with pyrite for 48 h than that without bacterial adaptation to pyrite, which was evidenced by the decrease in the contact angle of pyrite minerals by up to 50%. This evidence was also confirmed by the highest emulsifying index value (51.6%) attained during the bacteria-pyrite interaction. Hence, these bacteria can potentially be applied to selective flotation as pyrite depressants.
Biohydrometallurgy: paving the way for a greener future of mineral processing in Indonesia - A mini review Siti Khodijah Chaerun; Ronny Winarko; Frideni Yushandiana
Current Research on Bioscences and Biotechnology Vol. 5 No. 1 (2023)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/crbb.2023.5.1/8KIZ3AOE

Abstract

Biohydrometallurgy, a technology that employs microorganisms for metal extraction, has existed since the 1960s. As environmental regulations tighten and the quality and complexity of available ores for processing decline, this technology offers an alternative for mineral processing. Several countries, including South Africa, Russia, Chile, Australia, the United States, China, Burma, New Zealand, Peru, Uzbekistan, and Ghana, have used this method commercially in copper processing plants and gold and silver processing plants. In Indonesia, this method has not been developed or applied industrially. Given the challenges of limited capital and low-grade ore processing in the future, proposing biohydrometallurgical processing in Indonesia is worthwhile. Globally, biohydrometallurgy has become a significant area of research focus. In Indonesia, however, the investigation of biohydrometallurgy is primarily conducted at the Bandung Institute of Technology (ITB). This specific line of investigation was initiated in 2009, with an emphasis on extracting nickel (Ni) from laterite ores. Additional investigations have been undertaken to explore the extraction of metals including copper (Cu) and gold (Au). This review paper also summarizes ongoing laboratory-scale studies encompassing the extraction of lead (Pb), zinc (Zn), silicon (Si), magnesium (Mg), silver (Ag), rare earth elements (REEs), lithium (Li), strontium (Sr), phosphorus (P), potassium (K), calcium (Ca) and the application of phytomining technology and coal biomining. The research outcomes to date present a promising and potentially scalable perspective that could be advanced to pilot plant implementation and industrial application within Indonesia.
Co-Authors Edy Sanwani Fika Rofiek Mufakhir Frideni Yushandiana Halimatul Husni Nuslia Bayangkara Lamandhi Ronny Winarko Widi Astuti