ICDA 2022

Use of Low Cost Biosorbents for Treating Wastewater from Aquaculture

Sat, 01 Jan 2022 00:00:00 GMT

Use of Low Cost Biosorbents for Treating Wastewater from Aquaculture Kogulojan, K.; Banusha, S.; Piratheepan, S.; Mayurathy, T. Aquaculture contributes to the economy of Sri Lanka significantly. Aquaculture industries are producing export quality products while generating employment opportunities. Unique location of Sri Lanka and its resources supporting aquaculture development immensely. Even though aquaculture supporting our economy through multiple ways, the main hindrance for the development of this industry is the pollution caused by aquaculture waste water. Chemical Oxygen Demand (COD) is the amount of oxygen required to oxidize all soluble and insoluble organic compounds present in a volume of water. This can be used to know the pollution status of an aquaculture system. The main objective of this study was to analyze the physical and chemical parameters of aquaculture waste water and reduction of the Chemical Oxygen Demand in the waste water using environment friendly biosorbents. Waste water was collected from a hatchery and physical parameters such as the pH, total dissolved solids, dissolved oxygen, turbidity, electrical conductivity and temperature were analyzed. In this study three bio sorbents and their combination were used to compare their COD removal efficiency ( T1- Musa peel powder, T2 - Oyster shell powder, T3- Egg shell powder, T4 - 0.5g Egg shell mixed with 0.5g Musa peel powder, T5 - 0.5g Musa peel powder mixed with 0.5g Oyster shell powder, T6 - 0.5g Oyster shell powder mixed with 0.5g Eggshell powder). Results were analyzed using CRD design in SAS software. It was found that COD removal efficiency of Musa peel powder is high (92.63±0.86) and significantly different (p <0.05) from other treatments. Therefore can utilize Musa peel powder as an effective and low cost natural biosorbent.

Prevalence of Ectoparasites among Cattle in Kilinochchi District

Sat, 01 Jan 2022 00:00:00 GMT

Prevalence of Ectoparasites among Cattle in Kilinochchi District Kekulandara, D.; Shathya, S.; Piratheepan, S. Livestock sector has been contributing considerable portion to the economy of Sri Lanka, and still promising to play great role in the economic development of the country. Products and by-products come from livestock population is an essential source of income for the people who are living in Killinochchi district. There are several constrains found in cattle farming. Among them external parasitic infestation is one of the problem which affects the production adversely. Therefore, a cross-sectional study was conducted from March to July, 2022 with the objectives of determining the prevalence of ectoparasitic infestation in cattle and risk factors associated with ectoparasitism in Kilinochchi district. Total of 384 cattle (119 males and 265 female) were used to study the prevalence on live animals. The study revealed that cattle in the study area were infested with single infestation (6.7%) and multiple infestation (45.83%) with an overall prevalence of 52.60% (202/384). Overall eight genera of ectoparasites which belong to tick (47.89%), lice (4.45%) and mite (0.26%) were identified in flank, belly, shoulder, dorsal surface of the ear and along the dorsal side of the cattle. Among the genera of the ticks, Amblyomma, Boophilus, Hyalomma, and Rhipicephalus and three types of lice genera Damalina, Linognathus and Haematopinus were found. Only one genera of mite was identified namely, Demodex bovis. According to present study, three to seven years cattle were highly susceptible (49.50%) to ectoparasitic infestation compare to other age groups. In addition, highest prevalence (70.65%) was shown by female cattle. The cattle with the herd size of less than 14 were highly infected with external parasites (79.60%). The present study revealed that widespread occurrence of ectoparasites in cattle in the study area, thus, improved management practice and well-coordinated control interventions are required.

Study of Nutritional Characteristics of Silages from CO3, CO5, Red Napier (BH18) & Super Napier among Small Holder Dairy Farms in Kilinochchi District, Sri Lanka

Sat, 01 Jan 2022 00:00:00 GMT

Study of Nutritional Characteristics of Silages from CO3, CO5, Red Napier (BH18) & Super Napier among Small Holder Dairy Farms in Kilinochchi District, Sri Lanka Pushpakumara, H.M.C.; Thanusan, S.; Piratheepan, S. A study was conducted to examine the nutritive values of the silages made from major grasses available in the Kilinochchi District. Inadequate quality forage and the lower availability of forage crops is considered as a limiting factor for livestock production. Introducing of different silage grasses helps to overcome these problems all over the dry zone. In dry zone of the Sri Lanka, insufficient fodder production is one of the main factor restricting dairy production. Silage is a feed that has been preserved by acidification as a result of fermentation in the absence of oxygen. "Ensiled forage" or "silage," can remain intact for up to three years when storing properly. The lack of high-quality forages and their accessibility may be a factor in Sri Lanka for lower dairy productivity of livestock. In dry zone of the Sri Lanka, insufficient fodder production is one of the main factor restricting dairy production. The main objective of this study is to find out the nutritional characteristics of silage made from different grass (Indian red napier, CO5 grass and other napier grasses, CO3 and super napier) grown in Northern part of Sri Lanka. Proper matured grasses were harvested and four silage samples (T1,T2,T3 & T4) were prepared according to the standard procedure. The proximate composition of different types of silage made from different grasses were significantly different (p <0.05). Among the silages, CO5 had the highest percentage of crude protein (CP) (16.07 %) and moisture (75.04 %) meanwhile super napier had the highest percentage of fiber (31.43%), lowest percentage of ash content (2.5%) and lowest percentage of fat content (1.16%). Based on the above results, we can conclude that super napier silage have higher nutrient value compared with other silages. Therefore the silage made from super napier can be suggested for the Kilinochchi district farmers to provide better yield and growth performances.

Ginger Extract Supplemented Cow’s Milk Ice Cream Development

Sat, 01 Jan 2022 00:00:00 GMT

Ginger Extract Supplemented Cow’s Milk Ice Cream Development Rajapaksha, W.R.N.M.; Premakumar, K.; Afreen, S.M.M.S. Ice cream is a globally popular frozen dairy product. It's usually prepared from cow's milk. Antioxidant and phenolic components are often lacking in commercially marketed ice cream. In order to increase the usage of ginger extract and thus add value to cow’s milk ice cream, a study was conducted to look into the production and quality analysis of cow’s milk ice cream with ginger extract. The cow milk ice cream was formulated with varied concentrations of ginger extract, according to preliminary study. The treatments were: cow’s milk ice cream without ginger extract (T0), cow’s milk (l)with 20 g ginger extract (T1), cow’s milk (l)with 30 g ginger extract (T2), and cow’s milk (l) with 40 g ginger extract (T3). All treatments were subjected to chemical and sensory evaluations. The treatments differed considerably in pH, total solids, total soluble solids, fat content, titratable acidity, and ash content (p <0.05). As the concentration of ginger extract increased, the pH (6.67-6.47), total solids (36.9- 35.55%), total soluble solids (28.87-27.65 Brix), fat content (9.25-8.82%), and ash content (0.75-0.51%) reduced, while acidity (0.18-0.29%) increased. In terms of color, taste, texture, aroma, and overall acceptability, the panelists preferred T2 with 30 g/l ginger extract, followed by T1. Based on the findings of an experimental investigation of freshly prepared cow’s milk ice cream flavored with ginger extract, T2 was chosen to be the superior ice cream formulation.