BIOREMEDIATION AND RECYCLING OF TREATED WASTEWATER IN AN AQUAPONICS SYSTEM
No Thumbnail Available
Date
2021
Journal Title
Journal ISSN
Volume Title
Publisher
School of Science, Olusegun Agagu University of Science and Technology, Okitipupa, Ondo State
Abstract
This study highlighted bioremediation of aquaponics wastewater and its re-use by providing a breeding
compartment for the sh, plant and bacteria. The aquaponics wastewater from the sh, bio-remediated
water from the bio-lter and water from the plant pots that recycled back to the sh tanks were
characterized. An aquaponics setup was made to have three sh tanks and nine plant pots with three
different bed media of gravel, periwinkle and palm kernel shell to hold the plant without soil. As the
shes grew, nitrite and nitrate concentrations signicantly increased from 0.00 to 10.66 mg/L and from
0.00 to 30.13 mg/L respectively. The plants show a signicant increase to a maximum height growth of
22.86 cm for periwinkle, 20.24 cm for gravel, and 30.48 cm for palm kernel shells bed in each of the beds.
However, the palm kernel shells bed yielded the best plant growth measured up to 30.48 cm height.
Atomic absorption spectrophotometer (AAS) analysis shows that plants used up essential nutrients like
zinc, iron, and potassium from the bio-remediated water after the ninth week. For kinetic study, Line
Weaver-Burke plot of reciprocals of the data was plotted to examine the possibility of the reaction tting
into the Michaelis-Menten model. V was obtained to be 19.12 % which indicates the minimum max
concentration of substrate at which there will be maximum oxidation. K obtained to be 0.97 indicates the s
substrate concentration at which half the bacteria's active sites are occupied by a substrate. This
conrmed that the reaction in the system follows the rst order reaction so the behavior of the system's
reaction can be predicted over a desired time interval; Microbial nitrication shows Michaelis-Menten
kinetics.
JOURNAL OF THE SCHOOL OF SCIENCE
Volume 3, Issue 2. November, 2021 ISSN: 2714-3716
Description
Keywords
aquaponics, bioremediation, sh wastewater, lettuce, nitrate, nitrite