Liquid Level Detection by Using Optical Sensors in Riyadh Wastewater Treatment Station

C Damping coefficient
ODEs Second order linear
r Root of equation
Acknowledgment
I would like to thank my supervisor Professor Gui Tian strongly for being supportive and an excellent guidance throughout the duration of this work. My thanks must also go to Professor Matthew Armstrong for his advice regarding the control part of this project on. I would like to thank yassir Ali Bouraee for helping me in the fluid system control.
List of contents
Abstract…………………………………………………………………………….. 1
List of Symbols and Acronyms……………………………………………… 3

Acknowledgements…………………………………………………………………… 4

List of contents…………………………………………………………………………. 5

Chapter 1:Background 7

1.1 Introduction
1.2.1 What are wastewater treatment stations ………………….. 9

1,2.2 What are the wastewater sources

1.2.3 What are the wastewater release gases

Chapter 2: literature review 10
2.1 Introduction
2.2 The principle of liquid level detection and importance
2.3 Point liquid level detections techniques…………………………… 13
2.3.1 Magnetic and Mechanical float level sensors
2.3.2 Pneumatic level sensors
2.3.3 Conductive level…
The main aim of this project is to find the proper liquid level sensors between these two sensors for working in Riyadh wastewater treatment station. By the end of the project, one of the main reason which causes a problem to the ultrasonic level sensors at Riyadh station came up which is a high temperature or temperatures Variety. According to Monitoring weather center in Riyadh, the average temperature at the summer time between 40-55 degree in the day time and the moisture in Riyadh is very low. Therefore the ultrasonic sensor might get affected by the Variety of temperatures or high temperature. As result of low moisture and high temperatures, I think the proper sensor for Riyadh wastewater station is the optical infrared sensors.
In part of characteristics consideration for both sensors to select the suitable one for wastewater environment, the accuracy of the optical sensor for detecting the distance between the sensor and the liquid level is noticed even though the variations of surrounding temperature and sunlight intensity. The sensor was affected by dirt and misroute. The ultrasonic sensor is able to detect the distance even though the variations in moisture content, dirt and surrounding sunlight intensity. And, the sensor was severely affected by the difference of the surrounding temperature. Finally, both sensors can be used as distance detection sensor in the wastewater treatment field,” if a careful consideration is given to the characteristics of both sensors with improvement on problems pointed out in this study”.

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