Effect of Magnetic Field on the Type and Amount of Monomers in Polyhydroxyalkanoate Copolymer
Many studies have been conducted on production of biodegradable polymers such as polyhydroxyalkanoates (PHAs) in overcoming the environmental problems due to the accumulation of synthetic plastics as waste materials and excessive activated sludge produced in municipal waste water treatment plants. I...
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| Format: | Article |
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Iran Polymer and Petrochemical Institute
2014-10-01
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| Series: | علوم و تکنولوژی پلیمر |
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| Online Access: | http://jips.ippi.ac.ir/article_1092_f34b940fee721be1f35a23e1af29088f.pdf |
| _version_ | 1818729896058290176 |
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| author | Marzie Fatehi Seyed Ahmad Ataei |
| author_facet | Marzie Fatehi Seyed Ahmad Ataei |
| author_sort | Marzie Fatehi |
| collection | DOAJ |
| description | Many studies have been conducted on production of biodegradable polymers such as polyhydroxyalkanoates (PHAs) in overcoming the environmental problems due to the accumulation of synthetic plastics as waste materials and excessive activated sludge produced in municipal waste water treatment plants. In this study; the effect of magnetic field intensity of 5, 10, 15, 20, 25 and 50 milliTesla (mT) was investigated on the type and amount of monomers produced in the copolymer and PHA production in activated sludge and the results were compared simultaneously with the results of PHA production without the magnetic field (0 mT). The experimental procedure included the transfer of the activated sludge into the batch reactor, addition of sodium acetate, magnetic field generation by magnets, aeration for 30 h, sampling at definite timing, measurement of PHA by gas chromatography. In summary, this research indicated that, the maximum PHA content was produced at 20 mT which was equal to 0.75 g/L, whereas the lowest PHA content was observed at 50 mT (0.55 g/L). In addition, the magnetic field was influenced by the type and amount of monomer produced in PHA. The highest amount of valerate was observed at 50 mT, while this magnetic field decreased the amount of PHA (8.33%) compared to the control sample. Also, the maximum amount of butyrate monomer in the copolymer was observed at 5 and 20 mT, which were equal to 81% and 74 %. According to the results obtained, the mass percentage of valerate in the control sample and those exposed to magnetic field with negative effects was more than the mass percentage of butyrate; an indication of better copolymers on the basis of their mechanical properties. |
| first_indexed | 2024-12-17T22:53:10Z |
| format | Article |
| id | doaj.art-ecbb4179edcd4ddf803a9798121a2f94 |
| institution | Directory Open Access Journal |
| issn | 1016-3255 2008-0883 |
| language | fas |
| last_indexed | 2024-12-17T22:53:10Z |
| publishDate | 2014-10-01 |
| publisher | Iran Polymer and Petrochemical Institute |
| record_format | Article |
| series | علوم و تکنولوژی پلیمر |
| spelling | doaj.art-ecbb4179edcd4ddf803a9798121a2f942022-12-21T21:29:37ZfasIran Polymer and Petrochemical Instituteعلوم و تکنولوژی پلیمر1016-32552008-08832014-10-0127429829110.22063/jipst.2014.10921092Effect of Magnetic Field on the Type and Amount of Monomers in Polyhydroxyalkanoate CopolymerMarzie Fatehi0Seyed Ahmad Ataei1Department of Chemical Engineering, Shahid Bahonar University, P.O. Box: 7618891167, Kerman, IranDepartment of Chemical Engineering, Shahid Bahonar University, P.O. Box: 7618891167, Kerman, IranMany studies have been conducted on production of biodegradable polymers such as polyhydroxyalkanoates (PHAs) in overcoming the environmental problems due to the accumulation of synthetic plastics as waste materials and excessive activated sludge produced in municipal waste water treatment plants. In this study; the effect of magnetic field intensity of 5, 10, 15, 20, 25 and 50 milliTesla (mT) was investigated on the type and amount of monomers produced in the copolymer and PHA production in activated sludge and the results were compared simultaneously with the results of PHA production without the magnetic field (0 mT). The experimental procedure included the transfer of the activated sludge into the batch reactor, addition of sodium acetate, magnetic field generation by magnets, aeration for 30 h, sampling at definite timing, measurement of PHA by gas chromatography. In summary, this research indicated that, the maximum PHA content was produced at 20 mT which was equal to 0.75 g/L, whereas the lowest PHA content was observed at 50 mT (0.55 g/L). In addition, the magnetic field was influenced by the type and amount of monomer produced in PHA. The highest amount of valerate was observed at 50 mT, while this magnetic field decreased the amount of PHA (8.33%) compared to the control sample. Also, the maximum amount of butyrate monomer in the copolymer was observed at 5 and 20 mT, which were equal to 81% and 74 %. According to the results obtained, the mass percentage of valerate in the control sample and those exposed to magnetic field with negative effects was more than the mass percentage of butyrate; an indication of better copolymers on the basis of their mechanical properties.http://jips.ippi.ac.ir/article_1092_f34b940fee721be1f35a23e1af29088f.pdfmunicipal waste wateractivated sludgepolyhydroxyalkanoateaerationmagnetic field |
| spellingShingle | Marzie Fatehi Seyed Ahmad Ataei Effect of Magnetic Field on the Type and Amount of Monomers in Polyhydroxyalkanoate Copolymer علوم و تکنولوژی پلیمر municipal waste water activated sludge polyhydroxyalkanoate aeration magnetic field |
| title | Effect of Magnetic Field on the Type and Amount of Monomers in Polyhydroxyalkanoate Copolymer |
| title_full | Effect of Magnetic Field on the Type and Amount of Monomers in Polyhydroxyalkanoate Copolymer |
| title_fullStr | Effect of Magnetic Field on the Type and Amount of Monomers in Polyhydroxyalkanoate Copolymer |
| title_full_unstemmed | Effect of Magnetic Field on the Type and Amount of Monomers in Polyhydroxyalkanoate Copolymer |
| title_short | Effect of Magnetic Field on the Type and Amount of Monomers in Polyhydroxyalkanoate Copolymer |
| title_sort | effect of magnetic field on the type and amount of monomers in polyhydroxyalkanoate copolymer |
| topic | municipal waste water activated sludge polyhydroxyalkanoate aeration magnetic field |
| url | http://jips.ippi.ac.ir/article_1092_f34b940fee721be1f35a23e1af29088f.pdf |
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