Authors : Raad Abdul Hadi Nayyef and Thaer Mohammed Ibrahim
Abstract: The response of Escherichia coli bacteria witch was isolated from contaminated water to Chlorococcum humicola alcoholic algae extract was studied on growth and different parameters. The Extract concentration of C. humicola wear 0.07, 0.15, 0.31, 0.2 and 1.25 mg L-1. showed a high efficiency in significant reducing numbers of E. coli, the Growth Account (GA) showed a highest value at concentration 0.07 mg L-1 which was 303, 200 and 168 CFU mL-1 and less value at. 1.25 mg L-1 which was 99, 61 and 49 CFU mL-1 in 24, 48 and 72 h, respectively. While removal account (RA) appeared highest value at 1.25 mg L-1, 333, 419 and 431 CFU mL-1 and less value at concentration 0.07 mg L-1 which was 150 and 27.312 CFU mL-1. Also the mortality percent (MP) appeared highest value at 1.25 mg L-1 (68, 87 and 89 CFU mL-1) and less value at 0.07 mg L-1 witch was 31, 58 and 65 CFU mL-1 as well as the removing percentage of E. coli by green algae C. humicola which was 60, 80 and 82% in 24, 48 and 72 h, respectively. The result of study improved that the species E. coli is high sensitive to C. humicola alga extracts toxicity of algal extracts were time and concentration dependent. The aim of the study refers to can be used as biodegradation agent in order to disposal of pollution by E. coli witch represent the bacterial water pollutant, with possibility to used the alcoholic extract of green alga to reducing the time and cost the water treatment.
Raad Abdul Hadi Nayyef and Thaer Mohammed Ibrahim, 2019. Response of Esherichia coli to the Alcoholic Extract of Green Alga Chlorococcum humicola. Journal of Engineering and Applied Sciences, 14: 8929-8932.