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Evaluating The Effectiveness Of Algaecide In A Continuous Flow Through System

Aryal, Deepak, Aryal
http://rave.ohiolink.edu/etdc/view?acc_num=akron1533137036461609

Abstract Details

2018, Master of Science in Engineering, University of Akron, Engineering.
The occurrence of cyanobacteria blooms in freshwater resources has increased all over the world. Cyanobacteria blooms may contain toxins that are harmful to human health. In plant treatments can be very expensive so the water resource managers have started using algaecides in reservoirs to mitigate the problems associated with cyanobacteria. In this experiment, cyanobacteria and water samples from the drinking water reservoirs in the City of Norwalk and the City of Willard were used in a continuous flow through system. Control experiments were done for each reservoir to evaluate the effect of flow to cyanobacteria population. Treatment experiments were carried out to measure the effectiveness of algaecide in a flow through system. Half of the manufacturers recommended dose of Cutrine Ultra and EarthTec was used for samples from Willard and Norwalk, respectively. The cyanobacteria population decreased significantly (p <0.05), three hours after EarthTec was applied for samples from Norwalk. The cyanobacteria population in treatment reactors had decreased from 19,468 cells/ml to 12,881 cells/ml (p <0.05) in three hours, and further decreased to 10,265 cells/ml (p >0.05) in two days. Whereas for control reactors the cyanobacteria population had increased from 18,722 cells/ml to 19,847 cell/ml (p >0.05) in three hours, which then decreased to 17,567 cells/ml (p >0.05) after two days. For the samples from Willard, the cyanobacteria population declined from 19,450 cells/ml to 13,802 cells/ml (p >0.05) in three hours after Cutrine Ultra was applied and further decreased to 8,991 cells/ml (p >0.05) after two days. The cyanobacteria population in control reactors depicted an insignificant change (p <0.05) over the first two days. However, there was a significant decline (p< 0.05) in cyanobacteria population in control reactors after seven days for samples from Norwalk and after 14 days for samples from Willard. The samples from both the reservoirs were planktonic, so this decline in population was predominantly due to washout with the outflow. Whereas for treatment system, outflow along with residual copper in the reactors continuously decreased the cyanobacteria population.
Teresa Cutright, Dr. (Advisor)
Stephen Duirk, Dr. (Committee Member)
William Schneider, Dr. (Committee Member)
68 p.
Civil Engineering
algaecide, flow through, cutrine, earthtec, microcystis, anabaena, cyanobacteria

Recommended Citations

Citations

  • Aryal, Aryal, D. (2018). Evaluating The Effectiveness Of Algaecide In A Continuous Flow Through System [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1533137036461609

    APA Style (7th edition)

  • Aryal, Aryal, Deepak. Evaluating The Effectiveness Of Algaecide In A Continuous Flow Through System. 2018. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1533137036461609.

    MLA Style (8th edition)

  • Aryal, Aryal, Deepak. "Evaluating The Effectiveness Of Algaecide In A Continuous Flow Through System." Master's thesis, University of Akron, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1533137036461609

    Chicago Manual of Style (17th edition)

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This open access ETD is published by University of Akron and OhioLINK.