The effect of feed enzymes phytase, protease and xylanase on pelleting of microalgal biomass
Lower energy consumption for producing feed pellets is an important part of the economy in the feed mill. The same is if physical pellet quality is degraded. The interest in using of novel ingredients is increasing due to requirements for the sustainable development goals. Defatted microalgae as by-...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-12-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844021027018 |
| _version_ | 1828147762483429376 |
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| author | Dejan Dragan Miladinovic Trond Storebakken Odd Ivar Lekang Carlos Salas-Bringas |
| author_facet | Dejan Dragan Miladinovic Trond Storebakken Odd Ivar Lekang Carlos Salas-Bringas |
| author_sort | Dejan Dragan Miladinovic |
| collection | DOAJ |
| description | Lower energy consumption for producing feed pellets is an important part of the economy in the feed mill. The same is if physical pellet quality is degraded. The interest in using of novel ingredients is increasing due to requirements for the sustainable development goals. Defatted microalgae as by-product from biodiesel production is one of many novel ingredients. The purpose of this experiment was to understand how the addition of small amount of enzymes can reduce the flow resistance in the die during pellet discharge, without affecting the physical quality of pellets. Thus, possibly reduce the total consumption of electrical energy during compaction. Three enzymes, phytase, protease, xylanase, and combinations of those were added to defatted Desmodesmus subspicatus microalgae at 3 inclusion levels. Feed enzymes xylanase and phytase helped lowering the flow resistance of the material in the die. Reduction of flow resistance was in average 17 times lover when all three levels of enzyme phytase were used. The same was observed when 0.01% xylanase was added. All feed enzymes and their combination have evidently lowered underwater pellet swelling due to their hydrolytic activity at the surface of the microalgal particles. The hydrolytic activities of the feed enzymes did not affect hardness of the microalgal pellets. Contact angle degree between pellet surface and oil droplet was lowered when xylanase and protease was used at all three dosage levels. However, contact angle degree between pellet surface and water droplets was unaffected by the hydrolytic activity of enzymes. |
| first_indexed | 2024-04-11T21:05:01Z |
| format | Article |
| id | doaj.art-731ef3a62a69467ca3ea30585432108f |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-04-11T21:05:01Z |
| publishDate | 2021-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-731ef3a62a69467ca3ea30585432108f2022-12-22T04:03:22ZengElsevierHeliyon2405-84402021-12-01712e08598The effect of feed enzymes phytase, protease and xylanase on pelleting of microalgal biomassDejan Dragan Miladinovic0Trond Storebakken1Odd Ivar Lekang2Carlos Salas-Bringas3Norwegian University of Life Sciences (NMBU), Faculty of Biosciences, Department of Animal and Aquacultural Sciences, Norway; NMBU, Faculty of Science and Technology, Department of Process Engineering, Norway; Corresponding author.Norwegian University of Life Sciences (NMBU), Faculty of Biosciences, Department of Animal and Aquacultural Sciences, NorwayNMBU, Faculty of Science and Technology, Department of Process Engineering, NorwayNMBU, Faculty of Science and Technology, Department of Process Engineering, Norway; Norwegian University of Science and Technology, Faculty of Engineering, Department of Ocean Operations and Civil Engineering, NorwayLower energy consumption for producing feed pellets is an important part of the economy in the feed mill. The same is if physical pellet quality is degraded. The interest in using of novel ingredients is increasing due to requirements for the sustainable development goals. Defatted microalgae as by-product from biodiesel production is one of many novel ingredients. The purpose of this experiment was to understand how the addition of small amount of enzymes can reduce the flow resistance in the die during pellet discharge, without affecting the physical quality of pellets. Thus, possibly reduce the total consumption of electrical energy during compaction. Three enzymes, phytase, protease, xylanase, and combinations of those were added to defatted Desmodesmus subspicatus microalgae at 3 inclusion levels. Feed enzymes xylanase and phytase helped lowering the flow resistance of the material in the die. Reduction of flow resistance was in average 17 times lover when all three levels of enzyme phytase were used. The same was observed when 0.01% xylanase was added. All feed enzymes and their combination have evidently lowered underwater pellet swelling due to their hydrolytic activity at the surface of the microalgal particles. The hydrolytic activities of the feed enzymes did not affect hardness of the microalgal pellets. Contact angle degree between pellet surface and oil droplet was lowered when xylanase and protease was used at all three dosage levels. However, contact angle degree between pellet surface and water droplets was unaffected by the hydrolytic activity of enzymes.http://www.sciencedirect.com/science/article/pii/S2405844021027018MicroalgaeEnzymeFeedViscosityPhysical characterization |
| spellingShingle | Dejan Dragan Miladinovic Trond Storebakken Odd Ivar Lekang Carlos Salas-Bringas The effect of feed enzymes phytase, protease and xylanase on pelleting of microalgal biomass Heliyon Microalgae Enzyme Feed Viscosity Physical characterization |
| title | The effect of feed enzymes phytase, protease and xylanase on pelleting of microalgal biomass |
| title_full | The effect of feed enzymes phytase, protease and xylanase on pelleting of microalgal biomass |
| title_fullStr | The effect of feed enzymes phytase, protease and xylanase on pelleting of microalgal biomass |
| title_full_unstemmed | The effect of feed enzymes phytase, protease and xylanase on pelleting of microalgal biomass |
| title_short | The effect of feed enzymes phytase, protease and xylanase on pelleting of microalgal biomass |
| title_sort | effect of feed enzymes phytase protease and xylanase on pelleting of microalgal biomass |
| topic | Microalgae Enzyme Feed Viscosity Physical characterization |
| url | http://www.sciencedirect.com/science/article/pii/S2405844021027018 |
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