liu.seSearch for publications in DiVA
Change search
ReferencesLink to record
Permanent link

Direct link
Mapping of causes for variation in quality of sugar in chocolate manufacturing
Linköping University, Department of Physics, Chemistry and Biology, Biotechnology.
2016 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The main purpose of the report is to present possible reasons and solutions for variation in quality of sugar used in confectionery manufacturing, with focus on chocolate manufacturing, at Cloetta Sverige AB in Ljungsbro. The project has its purpose to optimize the quality of both the sugar and manufacturing processes in a long-term perspective, since the variation in quality of the sugar affects, more or less, all manufacturing processes and causes yield losses.


Cloetta Ljungsbro uses a pneumatic conveying system to transfer the sugar within the factory and when unloading the sugar from delivery trucks. A various of different analyses were performed in order to study the sugar quality; water content analyses in forms of Karl Fischer titration and particle size distribution analyses with help from sieving. During the sugar sampling time period, an observation of the air pressure used by the road tanker while unloading sugar at Cloetta and the lead time as sugar was delivered was executed. Moreover, data of the dew point in the pneumatic conveying system and, both temperature and humidity in the sugar silos, were collected.


As a result, most of the sugar particles breakage occurred somewhere between the delivery road tanker and while in the storage silos. Most likely it is due to the use of high pressure when unloading the sugar that the particle size distribution of the sugar varies, but also causes the temperature to reach a higher temperature than recommended. Furthermore, the water content of the sugar was higher in the beginning of the autumn. Further investigations of the effect of unloading the sugar and storage of sugar should be done, but also analyse the air velocity used within the pneumatic conveying system.

Place, publisher, year, edition, pages
2016. , 39 p.
Keyword [en]
Cloetta, Chocolate manufacturing, Confectionary manufacturing, chococlate, confectionary, sugar, production, quality, particle size, Karl-Fischer titration, food processing, food processsing industry
National Category
Other Industrial Biotechnology
URN: urn:nbn:se:liu:diva-125234ISRN: LITH-IFM-A--EX—16/3136--SEOAI: diva2:903761
External cooperation
Subject / course
2016-01-29, Planck, Linköping, 13:00 (Swedish)
Available from: 2016-02-18 Created: 2016-02-16 Last updated: 2016-02-18Bibliographically approved

Open Access in DiVA

Mapping of causes for variation in quality of sugar in chocolate manufacturing(4287 kB)98 downloads
File information
File name FULLTEXT01.pdfFile size 4287 kBChecksum SHA-512
Type fulltextMimetype application/pdf

By organisation
Other Industrial Biotechnology

Search outside of DiVA

GoogleGoogle Scholar
Total: 98 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 162 hits
ReferencesLink to record
Permanent link

Direct link