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Undergraduate Theses

Permanent URI for this collectionhttps://hdl.handle.net/20.500.14578/5

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Subject: search.filters.lcsh.Cassava

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    Processing of fiber based biofoam cups using sugarcane bagasse and cassava starch as plant container for hydroponic system
    Sarno, Ma. Rachel Anne N. (Davao del Sur State College, 2024-05)
    The study was designed to produce a fiber-based biofoam cup from different mixtures of sugarcane bagasse and cassava starch, an alternative to styrofoam cups as plant containers in a hydroponics set-up. The study was carried out with 3 treatments replicated thrice. The mixture was added with a constant amount of polyvinyl alcohol, glycerol and magnesium stearate by weight basis, and then coated with paraffin wax. The data for density, water absorption, solubility as well as the performance of the biocups in terms of plant growth (no. of leaves), plant mortality and pH level when used as plant containers in Kratky method were gathered through a completely randomized design and analyzed using the analysis of variance (ANOVA) and the Least Significant Difference (LSD) test at 1% and 5% levels. Only the treatment yielding the best results in terms of quality were evaluated for hydroponic application. Statically, the results indicate that the density and water absorption of the cups from the three treatments significantly varied with a P-value of 0.0055 and 0.0127 respectively. However, no significant difference was observed for the solubility of the biocups among the treatment with a P- value of 0.0827. Based on the results, treatment 3 exhibited the highest density and lowest values for solubility and water absorption among the treatments and was selected with the commercially available styrofoam cups as plant containers in Kratky method hydroponics set-up. For the duration of the observation period, all petchay plants survived resulting in a mortality rate of 0%. Furthermore, there was a significant difference in the number of leaves, as indicated by the P-value of 0.0059 while pH level was found to be lower (6.38) for treatment 3 than the control (6.40). The results suggest that biofoam cups are not best to be used as plant container in hydroponics, but due to its higher density, low water absorption and solubility it implies potential suitability for other planting materials, such as for seedlings.
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    Processing of paperboard from the fiber of torch ginger (Etlingera elatior) stem at different levels of cassava starch as binder
    Blasquez, Irenella A. (Davao del Sur State College, 2024-05)
    This study examined the potential of torch ginger (Etlingera elatior) stem fiber as an alternative source of fiber added with different levels of cassava starch as binder for paperboard production. The study was established with three (3) treatments and each is replicated thrice. The treatments were: Treatment 1: 240 grams cassava starch, Treatment 2: 320 grams cassava starch, and Treatment 3: 480 grams cassava starch. Using a molder, the pulp was molded and sundried until the desired weight was achieved. The paperboards were then tested in terms of odor, paper whiteness, smoothness/texture, grammage, water absorbency, and pH level. The data collected was statistically analyzed using one-way analysis of variance (ANOVA) at 1% and 5% levels of significance. Statistically, results showed significant difference in the odor, paper whiteness, smoothness of texture, or water absorbency of the produced paperboard among the treatments, while the ANOVA results for grammage showed a significant difference. Moreover, the pH level was tested in a composite manner, with pH values ranging from 8.7-9.0 and Treatment 1 having the lowest unit production cost analysis which if PHP 14.46 per piece of paperboard. Thus, torch ginger (E. elatior) stem fiber is a potential material for paperboard production.