Oxygen Transfer Efficiency of the Aeration Process in Refinery Waste Water Treatment

2008 ◽  
Vol 59 (2) ◽  
pp. 220-225
Author(s):  
Miroslav Stanojevic ◽  
Aleksandar Jovovic1 ◽  
Dejan Radic ◽  
Milan Pavlovic
Keyword(s):  
Waste Water ◽  
Experimental Investigation ◽  
Water Column ◽  
Oxygen Transfer ◽  
Mass Concentration ◽  
Waste Water Treatment ◽  
Motor Oil ◽  
Refinery Waste Water ◽  
Oxygen Transfer Efficiency ◽  
Aeration Process

This paper presents the results of an experimental investigation of aeration of water with a corresponding mass concentration of waste motor oil depending on the height of the liquid column for varied flow of air introduced into the water. The aeration process for water column heights of 1 and 2 m were investigated. The purpose of investigations performed on an experimental installation was comparison of technical indicators of the aeration process depending on the height of the water column and air flow in order to achieve more efficient purification of waste water.

Power Generation and Oxygen Transfer Analyses for Micro Hydro-Turbine Installed in Wastewater Treatment Aeration Tank

2021 ◽  
pp. 1-16
Author(s):  
Abdel Rahman Salem ◽  
Alaa Hasan ◽  
Ahmad Abdelhadi ◽  
Saif Al Hamad ◽  
Mohammad Qandil ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Oxygen Transfer ◽  
Power Loss ◽  
Wastewater Treatment Plants ◽  
Aeration Tank ◽  
Hydro Turbine ◽  
Oxygen Transfer Efficiency ◽  
Aeration Process ◽  
The U.S ◽  
Water Height

Abstract This study targets one of the major energy consumers in the U.S. It suggests a new mechanical system that can recover a portion of the energy in Wastewater Treatment Plants (WWTPs). The proposed system entails a hydro-turbine installed above the air diffuser in the aeration tank to extract the water-bubble current's kinetic energy and converts it to electricity. Observing the optimum location of the turbine required multiple experiments where turbine height varies between 35% and 95% (water height percentages above the diffuser), while varying the airflow between 1.42 L/s (3 CFM) and 2.12 L/s (4.5 CFM) with a 0.24 L/s (0.5 CFM) increment. Additionally, three water heights of 38.1 cm (15”), 53.4 cm (21”), and 68.6 cm (27”) were considered to study the influence of the water height. It was noticed that the presence of the system has an adverse effect on the Standard Oxygen Transfer Efficiency (SOTE). Therefore, a small dual-blade propeller was installed right above the diffuser to directly mix the water in the bottom of the tank with the incoming air to enhance the SOTE. The results showed that the maximum reclaimed power was obtained where the hydro-turbine is installed at 65% - 80% above the diffuser. A reduction of up to 7.32% in SOTE was observed when the setup was placed inside the tank compared to the tank alone. The addition of the dual-blade propeller showed an increase in SOTE of 7.27% with a power loss of 6.21%, ensuring the aeration process was at its standards.

scholarly journals Progress in Shale Oil Refinery Waste Water Treatment Technology

2021 ◽  
Vol 687 (1) ◽  
pp. 012053
Author(s):  
Fu Yuting ◽  
Li Changbo ◽  
Zhao Guozheng ◽  
Liang Hui ◽  
Wang Shuo ◽  
...  
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Waste Water Treatment ◽  
Oil Refinery ◽  
Shale Oil ◽  
Treatment Technology ◽  
Refinery Waste ◽  
Refinery Waste Water ◽  
Water Treatment Technology

Design of a Deflector for Water Aeration in Wastewater Treatment

2012 ◽  
Author(s):  
R. S. Amano ◽  
Ammar Alkhalidi ◽  
Patrick Bryar
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Power Consumption ◽  
Energy Cost ◽  
Oxygen Transfer ◽  
Energy Crisis ◽  
Water Tank ◽  
Oxygen Transfer Efficiency ◽  
Oxygenated Water ◽  
Air Blower

The aeration phase within wastewater treatment is the most power consuming step required in the treatment of waste water. After the energy crisis in 1970s increasing attention has been paid for this step to reduce the energy cost [1]. Higher standard oxygen transfer efficiency (SOTE) reduces the amount of air required to aerate wastewater which reduce the air blower power consumption. In this study SOTE was investigated for the case of adding a bubble deflector, i.e. an external geometry that directs the bubbles toward the less oxygenated water, which improves the efficiency and eliminates the effect of dead zones in a rectangular water tank.

Sign in / Sign up

Export Citation Format

Share Document