WEB-REPORT
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Group 1-08
Project Title Investigating the usage of bacteria in the removal of nitrates and phosphates from water bodies to reduce the effects of eutrophication
Synopsis Eutrophication is a common issue faced by coastal regions throughout the world. It is caused by high concentrations of phosphate and nitrate ions in the water, resulting in proliferation of algae which will ultimately disrupt the growth of aquatic organisms. Common methods involve the use of algaecides and coagulants, however, the byproduct of such methods may be toxic to certain species of animals. As such, the usage of bacteria to remove these ions may find new potential applications. Different species of bacteria were grown in nutrient broth supplemented with nitrate or phosphate ions in the test setups. No bacteria were added in the control setups. The concentration of residual ions was then determined. It was found that Bacillus subtilis and Pseudomonas putida removed an average of 46.2% and 42.3% of phosphate ions, respectively, while Alcaligenes eutrophus removed 52.7% nitrate ions. Co-inoculation of both B. subtilis and P. putida removed more phosphate ions than that when they occurred singly, suggesting a synergistic effect in the removal of phosphate ions. Immobilization of bacteria in calcium alginate beads has proven effective, and does not affect the phosphate-removal abilities of the bacteria.
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Team Members
(Names & Classes)
Group Leader:
YAU CHUN EN 3S1
 
Group Member/s:
LOO GUAN HIN 3S1
LOW YU XUAN 3S1