Low-Cost Investment with High Quality Performance. Bleaching Earths for Phosphorus Reduction in the Low-Temperature Bleaching Process of Rapeseed Oil
Rapeseed oils are a valuable component of the diet. Mostly, there are refined oils deprived of valuable nutrients in the market, hence in recent times cold-pressed and unrefined oils have been available and popular among consumers. However, the low yield of this oil makes this product expensive. The...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-05-01
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| Series: | Foods |
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| Online Access: | https://www.mdpi.com/2304-8158/9/5/603 |
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| author | Barbara Łaska-Zieja Damian Marcinkowski Wojciech Golimowski Gniewko Niedbała Ewelina Wojciechowska |
| author_facet | Barbara Łaska-Zieja Damian Marcinkowski Wojciech Golimowski Gniewko Niedbała Ewelina Wojciechowska |
| author_sort | Barbara Łaska-Zieja |
| collection | DOAJ |
| description | Rapeseed oils are a valuable component of the diet. Mostly, there are refined oils deprived of valuable nutrients in the market, hence in recent times cold-pressed and unrefined oils have been available and popular among consumers. However, the low yield of this oil makes this product expensive. The aim of the study was to analyse the effectiveness of phosphorus reduction in crude oils, cold- and hot-pressed in the low-temperature bleaching process. Eight market-available bleaching earths was compared. The effectiveness of 90% was found with 2% (m/m) of Kerolite with hydrated magnesium silicate. An increase in the share of earths to 4% (m/m) resulted in the effectiveness of phosphorus reduction >90% in seven out of eight analysed cases. Bentonite activated with acid with the lowest MgO content was characterised by low efficiency <64%. The research shows that the effectiveness of phosphorus reduction was significantly affected by the composition of earths applied in the bleaching process at ambient temperature. The results of research confirm the high effectiveness of the process as it is not necessary to heat up the oil before the bleaching process. This method is recommended for existing and new industrial plant for two-stage rapeseed oil pressing. |
| first_indexed | 2024-03-10T19:57:20Z |
| format | Article |
| id | doaj.art-4e79128f98824cb38e4fe50643ad38c6 |
| institution | Directory Open Access Journal |
| issn | 2304-8158 |
| language | English |
| last_indexed | 2024-03-10T19:57:20Z |
| publishDate | 2020-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Foods |
| spelling | doaj.art-4e79128f98824cb38e4fe50643ad38c62023-11-19T23:48:46ZengMDPI AGFoods2304-81582020-05-019560310.3390/foods9050603Low-Cost Investment with High Quality Performance. Bleaching Earths for Phosphorus Reduction in the Low-Temperature Bleaching Process of Rapeseed OilBarbara Łaska-Zieja0Damian Marcinkowski1Wojciech Golimowski2Gniewko Niedbała3Ewelina Wojciechowska4Institute of Technology and Life Sciences, Hrabska 3, 05-090 Raszyn, PolandInstitute of Technology and Life Sciences, Hrabska 3, 05-090 Raszyn, PolandWroclaw University of Economics and Business, Komandorska 118-120, 53-345 Wroclaw, PolandInstitute of Biosystems Engineering, Faculty of Agronomy and Bioengineering, Poznań University of Life Sciences, Wojska Polskiego 50, 60-627 Poznań, PolandNorwegian Institute of Bioeconomy Research (NIBIO), Postboks 115, 1431 Ås, NorwayRapeseed oils are a valuable component of the diet. Mostly, there are refined oils deprived of valuable nutrients in the market, hence in recent times cold-pressed and unrefined oils have been available and popular among consumers. However, the low yield of this oil makes this product expensive. The aim of the study was to analyse the effectiveness of phosphorus reduction in crude oils, cold- and hot-pressed in the low-temperature bleaching process. Eight market-available bleaching earths was compared. The effectiveness of 90% was found with 2% (m/m) of Kerolite with hydrated magnesium silicate. An increase in the share of earths to 4% (m/m) resulted in the effectiveness of phosphorus reduction >90% in seven out of eight analysed cases. Bentonite activated with acid with the lowest MgO content was characterised by low efficiency <64%. The research shows that the effectiveness of phosphorus reduction was significantly affected by the composition of earths applied in the bleaching process at ambient temperature. The results of research confirm the high effectiveness of the process as it is not necessary to heat up the oil before the bleaching process. This method is recommended for existing and new industrial plant for two-stage rapeseed oil pressing.https://www.mdpi.com/2304-8158/9/5/603rapeseed oilbleaching processbleaching earthphosphorusfood technology |
| spellingShingle | Barbara Łaska-Zieja Damian Marcinkowski Wojciech Golimowski Gniewko Niedbała Ewelina Wojciechowska Low-Cost Investment with High Quality Performance. Bleaching Earths for Phosphorus Reduction in the Low-Temperature Bleaching Process of Rapeseed Oil Foods rapeseed oil bleaching process bleaching earth phosphorus food technology |
| title | Low-Cost Investment with High Quality Performance. Bleaching Earths for Phosphorus Reduction in the Low-Temperature Bleaching Process of Rapeseed Oil |
| title_full | Low-Cost Investment with High Quality Performance. Bleaching Earths for Phosphorus Reduction in the Low-Temperature Bleaching Process of Rapeseed Oil |
| title_fullStr | Low-Cost Investment with High Quality Performance. Bleaching Earths for Phosphorus Reduction in the Low-Temperature Bleaching Process of Rapeseed Oil |
| title_full_unstemmed | Low-Cost Investment with High Quality Performance. Bleaching Earths for Phosphorus Reduction in the Low-Temperature Bleaching Process of Rapeseed Oil |
| title_short | Low-Cost Investment with High Quality Performance. Bleaching Earths for Phosphorus Reduction in the Low-Temperature Bleaching Process of Rapeseed Oil |
| title_sort | low cost investment with high quality performance bleaching earths for phosphorus reduction in the low temperature bleaching process of rapeseed oil |
| topic | rapeseed oil bleaching process bleaching earth phosphorus food technology |
| url | https://www.mdpi.com/2304-8158/9/5/603 |
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