Bioeconomic study a marine phytoplankton Chaetoceros calcitran by using commercial and formulated fertilizer

Studies were carried out on two different aspect of marine diatom, Chaetoceros calcitran. First is the measure of cell growth base on number of cells and dry weight in different culture media such as LCP, LCP + clewat 32, Japanese Media and Conway Media as reference. The second study is looking at the effect of growth in different tank such as glass tank, conical fiberglass tang and rectangular fiberglass tank. All the culture of Chaetoceros calcitran, was carried out in outdoor tank, salinity of 23.25 % and ambient air temperature of 27-36 °C. Throughout the study, the weather is sunny. Results shows that Chaetoceros calcitran cultured in Conway media has the highest cell at 1.843 x 106 cells (maximum cell number) and 0.870 g/L (maximum dry weight). The Cultivation cost for Conway media and LCP were RM 41.227 and RM 74.833 respectively. The results from second showed growth are in the glass tank which is 1.687 x 106 cell/ml (maximum cell growth) and 0.783 g/L (maximum dry weight). Cultivation in a glass tank also showed that the lowest production cost at RM 45.191 /g dry weight compared to the fiber conical tank and rectangular fiber glass tank

The development of low cost turbidimeter using smartphone camera and image processing

In this paper, the design fabrication and development of a low-cost turbidimeter with a smartphone camera and image processing are demonstrated. The turbidimeter serves as a simple and low cost alternative to professional standard turbidimeters as well as other proposed turbidimeters presented in other studies. This turbidimeter is made from affordable and widely available materials and electronic components. The proposed turbidimeter was tested and able to determine the turbidity of Formazine samples between 0 and 100 NTU with the coefficient of determination R2= 0.982. The overall cost of this turbidimeter is only USD4.35, which is well below the cost of other proposed turbidimeter