Enhancement of Nitrogen Removal by Biological Cell-Entrapment Technique
Date Issued
2009
Date
2009
Author(s)
Lan, Jack Jih-Wei
Abstract
Biological cell entrapment technique has many advantages in the application of wastewater treatment include simple preparation, low effluent suspended solid content, better mechanical strength and low operation cost. In this study, the bio-carriers were prepared by using cellulose triacetate to entrapped aerobic sludge obtained from domestic wastewater treatment plant, domestic and Thin Film Transistor Liquid Crystal Display (TFT-LCD) industry wastewater treated with bio-carriers. Therefore, this research attempts to investigate the removal efficiency of carbon and nitrogen of application of the cell entrapment technique with different hydraulic retention time (HRT) and aeration ration.In this study, two sets of experiment were carried out for the examination of system performance. Set A use influent from domestic wastewater treatment plant and Set B use influent from TFT-LCD industry’s wastewater treatment plant, each set of experiment has three stages of test. In set A experiment, raw wastewater was used as the influent, synthetic wastewater was added with raw wastewater in stage two, calcium carbonate and methanol were added in stage three combined with raw wastewater. Site B use raw wastewater as influent during three stages of test.In order to explore the nitrogen removal efficiency of the bio-carriers, both sets of experiment were operated at different HRT (12, 9 and 6 hrs) and aeration ratio (1ON:1OFF, 1 ON:2 OFF, 2 ON:1 OFF and 2 ON:2 OFF).The results shows that the biological cell-entrapment technique at HRT 12hrs and intermitted aeration of 1 ON:2 OFF and 2 ON:1 OFF could remove COD effectively (90%) and the highest removal efficiencies of nitrogen when adding and without adding methanol were 86% and 40%, respectively.
Subjects
cell entrapment
nitrification
denitrification
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-98-R96541134-1.pdf
Size
23.53 KB
Format
Adobe PDF
Checksum
(MD5):de70faf541ff06472f3e8b0585f0366d