waste frying oil
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2022 ◽  
Vol 153 ◽  
pp. 111790
Author(s):  
Wan Adibah Wan Mahari ◽  
Seng Hon Kee ◽  
Shin Ying Foong ◽  
Tan Suet May Amelia ◽  
Kesaven Bhubalan ◽  
...  

2022 ◽  
Vol 82 ◽  
Author(s):  
H. Kahraman ◽  
C. C. Karaderi

Abstract In this study, we investigated the proline and protease production of different bacteria in several organic waste materials. Our aim was to produce proline and protease economically in waste that is abundantly available while reducing its environmental impact. 5 ml of different organic waste materials (OWW: Olive waste water; N.B: Nutrient Broth; EW: Eggshell; PBS: PBS buffer; PLW: Peach leaf wastes; TCW: Turkish coffee wastes; TWW: Tea waste water; WCW: Waste cheese whey; WFO: Waste frying oil) were placed in 10 ml grow tubes, inoculated and incubated for 24 h. Phosphate-buffered saline and 10% solutions of different organic wastes were added. These cultures were subsequently incubated at 37°C for 24 h. Cells were harvested at 24 h for L-proline assay. 1 ml of culture was transferred by pipette into an Eppendorf tube and centrifuged at 14,000 rpm for 20 min at room temperature. Cellular debris was removed by centrifuge and the supernatant was used for proline activity assays. Protease activity was determined using a modified method with casein as the substrate. We found that proline and protease can easily be produced economically using Turkish coffee wastes (TCW), Waste cheese whey (WCW) and Olive waste water (OWW) organic waste. We believe that this study will result in similar research leading to the economical use of these waste materials thus reducing their impact on the environment.


ACS Omega ◽  
2021 ◽  
Author(s):  
Mosharof Hossain ◽  
Nuzhat Muntaha ◽  
Lipiar Khan Mohammad Osman Goni ◽  
Mohammad Shah Jamal ◽  
Mohammad Abdul Gafur ◽  
...  

2021 ◽  
Author(s):  
Shimaa R. Hamed ◽  
Raed S. Al-Wasify ◽  
Samar Ragab

Abstract Soil fungi have unique physiological and metabolic features, and are considered as an important source of biomolecules. The present research aims to study the ability of local soil fungal isolates for the production of biosurfactants and to study the stability of these biosurfactants under different temperatures (50, 70, 90, 110, and 121 ºC), different pH values (2, 3, 6, 10, 12, and 15), and different salinity concentrations (5, 10, 15, 20, and 25% NaCl) depending on the formation of clear zone using oil displacement area (ODA) test. The research also aims to study the enhancement effect of four vegetable oils including sunflower oil, waste frying oil, olive oil, and corn oil on the activity of the produced biosurfactants. The obtained results showed that Aspergillus flavus, Aspergillus wentii and Fusarium sp. had the maximum biosurfactants production. The stability of biosurfactants occurred at alkaline pH, wide range of temperatures, and under high salinity (15%). Sunflower oil had the maximum enhancement effect on the activity of the produced biosurfactants, while corn oil showed lower enhancement effect. Depending on the obtained results, it can be concluded that local soil fungal isolates are considered as a promising source for production of biosurfactants.


2021 ◽  
Vol 24 (4) ◽  
pp. 153-158
Author(s):  
Darwin ◽  
Atmadian Pratama ◽  
Mardhotillah

Abstract Various carbon-rich solid catalysts are evaluated for the synthesis of biodiesel from waste frying oil. The study results showed that the use of activated carbon made of corn stalk could increase the biodiesel yield by 7%. The heterogeneous carbon-based catalysts made of lignocellulosic residues could successfully improve the quality of biodiesel properties. The results obtained revealed that the biodiesel properties, including relative density (852–900 kg·m−3) and kinematic viscosity (2.4–3.9 mm2·s−1), are in compliance with the standard limits of ASTM and the European Biodiesel Standard, suggesting that the biodiesel produced would be decent as a diesel fuel that potentially can minimize the serious damage of engine parts, and prolong the engine life.


AMB Express ◽  
2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Aiman Umar ◽  
Aneeqa Zafar ◽  
Hasina Wali ◽  
Meh Para Siddique ◽  
Muneer Ahmed Qazi ◽  
...  

AbstractAt present time, every nation is absolutely concern about increasing agricultural production and bioremediation of petroleum-contaminated soil. Hence, with this intention in the current study potent natural surfactants characterized as lipopeptides were evaluated for low-cost production by Bacillus subtilis SNW3, previously isolated from the Fimkessar oil field, Chakwal Pakistan. The significant results were obtained by using substrates in combination (white beans powder (6% w/v) + waste frying oil (1.5% w/v) and (0.1% w/v) urea) with lipopeptides yield of about 1.17 g/L contributing 99% reduction in cost required for medium preparation. To the best of our knowledge, no single report is presently describing lipopeptide production by Bacillus subtilis using white beans powder as a culture medium. Additionally, produced lipopeptides display great physicochemical properties of surface tension reduction value (SFT = 28.8 mN/m), significant oil displacement activity (ODA = 4.9 cm), excessive emulsification ability (E24 = 69.8%), and attains critical micelle concentration (CMC) value at 0.58 mg/mL. Furthermore, biosurfactants produced exhibit excellent stability over an extensive range of pH (1–11), salinity (1–8%), temperature (20–121°C), and even after autoclaving. Subsequently, produced lipopeptides are proved suitable for bioremediation of crude oil (86%) and as potent plant growth-promoting agent that significantly (P < 0.05) increase seed germination and plant growth promotion of chili pepper, lettuce, tomato, and pea maximum at a concentration of (0.7 g/100 mL), showed as a potential agent for agriculture and bioremediation processes by lowering economic and environmental stress. Graphical Abstract


Catalysts ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1150
Author(s):  
Karna Wijaya ◽  
Asma Nadia ◽  
Arina Dinana ◽  
Amalia Febia Pratiwi ◽  
Alfrets Daniel Tikoalu ◽  
...  

The synthesis of a sulfated silica catalyst and its modification with Ni and/or Mo metal, along with its application for the hydrocracking of fresh and waste frying oil into biogasoline, were conducted. Synthesis of the catalysts was initiated with the sulfation of silica (SiO2) material by H2SO4 using the sol-gel method. Ni and/or Mo metal were impregnated into the SO4/SiO2 matrix with concentration variations of 1, 2, and 3 wt%. The sulfation process and promotion by Molybdenum (Mo) metal in the modified catalyst successfully increased the catalytic activity and selectivity. Among the catalysts investigated, Ni-SS2 exhibited the best performance for the hydrocracking reaction with waste frying oil. This catalyst was able to achieve a conversion of the liquid product of 71.47% and a selectivity of 58.73% for the gasoline fraction (C5-C12). NiMo-SS3 showed the highest percentage of activity and selectivity in the hydrocracking of fresh frying oil at 51.50 and 43.22 wt%, respectively.


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