Raising and controlling study of dissolved oxygen concentration in closed-type aeration tank
Journal
Environmental Technology
Journal Volume
26
Journal Issue
7
Pages
805-810
Date Issued
2005
Author(s)
Abstract
This study investigated the promotion and control of dissolved oxygen (DO) concentration of the closed-type aeration tank via practical experiments in the wastewater treatment system of a 5-star hotel in Taipei. As with limited and treasured space in Taiwan, before the completion of the sewer system construction in cities, to utilize the mat foundation under large buildings as the space of sewage treatment plant still has been one of the alternatives of those sewage treatments. However, aeration tanks constructed in the mat foundation of buildings have smaller effective water depth, which will cause a lower total transfer amount of DO. Controlling the total exhaust gas flow rate can increase the pressure on such closed-type aeration tanks. The DO concentration thus may increase according to Henry's Law. Furthermore, it may enable operators to adjust the DO concentration of the aeration tank more precisely and thus sustain optimal operating conditions in these treatment facilities. Practical experiments indicated that the DO concentration of aeration tank maintains an average of 3.8 mg 1-1, obtaining the optimum operating conditions. The efficiency of the biological treatment facilities in the mat foundation could be markedly improved. © Selper Ltd, 2005.
Subjects
Closed-type aeration tank; DO concentration; Henry's law; Mat foundation
SDGs
Other Subjects
Bioremediation; Flow of gases; Foundations; Sewage tanks; Sewage treatment plants; Wastewater treatment; Aeration tanks; Dissolved oxygen concentrations; DO concentration; Henry's law; Mat foundations; Optimal operating conditions; Optimum operating conditions; Wastewater treatment system; Dissolved oxygen; dissolved oxygen; aeration; biological treatment; dissolved gas; Wastewater treatment; aeration; article; atmospheric pressure; environmental economics; environmental monitoring; exhaust gas; flow rate; mathematical computing; oxygen concentration; sewage treatment plant; Taiwan; tank; waste water management; water analysis
Type
journal article