The Production of Black Board Chalks Using Egg Shell Waste

Simple item page
dc.contributor.authorSiriwardana, K.W.D.D.
dc.date.accessioned2021-03-18T06:50:43Z
dc.date.available2021-03-18T06:50:43Z
dc.date.issued2012
dc.description.abstractChalk is used for writing purpose in around the world. It is made of calcium carbonate or plaster of Paris. Poultry hatchery wastes the voluble egg shell calcium carbonate. Therefore objective of this study was to add value to egg shell & check properties of produced chalks. Brown egg shells were collected crushed and washed using water to remove any dirt. Then, the particles were dried under the sun and ground to a fine powder. The dried egg shell powder was added in to the boiling water and the solution was filtered using a filter paper and the filtrate was kept for 01 hr for sedimentation. Then, the sediment was dried under sunlight and dried particles were ground into a fine powder. The resulting powder was added to clean water and POP was added to the solution. Then the slurry was poured in to a mould and kept 1-2 days under sunlight for drying. In this study, five treatments with varying proportions of Ca(OH)2 and POP (10:40, 20:40, 30:40 and 40:40) were added and commercial chalk was used as the control. Treatments were arranged in Completely Random Design (CRD) with three replicates for each treatment. Density, strength, proportion lost, dust flowage and pH were measured. Data were analyzed using Analysis of Variance (ANOVA) with 95% significance level. Writing quality was also measured using untrained panelists and data were analyzed using Friedman non-parametric test with 95% significance using MINITAB 14 software package. According to the statistical analysis, suitable highest chalk strength, proportion lost, dust flowage and better sound writing quality were shown by the treatment 5 (control).Nevertheless treatment 3 (30 g (75%) egg shell Ca(OH)2+ 40 g) showed the highest chalk density compare to others and treatment 1(10 g(25%) egg shell Ca(OH)2 + 40 g POP) indicated suitable chalk pH value. by concerning all the results, researcher could produce the good egg shell chalk (Treatment 1) because it firstly indicated the convenience pH value for the writer, higher chalk density compare to treatment 5 and also it indicated approximate low proportion lost, approximate close dust flowage and approximate writing quality compare to treatment 5. Key Words: Chalk, Poultry, Egg Shellen_US
dc.identifier.otherUWU/ANS/08/0028
dc.identifier.urihttp://www.erepo.lib.uwu.ac.lk/bitstream/handle/123456789/6134/UWULD%20ANS%2008%200028-09042019092809.pdf?sequence=1&isAllowed=y
dc.language.isoenen_US
dc.publisherUva Wellassa University of Sri Lankaen_US
dc.relation.ispartofseries;UWU/ANS/08/0028
dc.subjectAnimal Science Degree Programmeen_US
dc.titleThe Production of Black Board Chalks Using Egg Shell Wasteen_US
dc.title.alternativeResearch Article – ANS 2012en_US
dc.typeThesisen_US
Files
Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
UWULD ANS 08 0028-09042019092809.pdf
Size:
7.17 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Animal Science Degree Programme (ANS)