Root intrusion in sanitary sewers is a significant contributor to the alarming rate of sanitary sewer overflows occurring in the US. A better understanding of popular root control methods is required for the development of an optimal root removal protocol. This research focuses on experiment design and data collection for the comparison of popular root control methods in a pilot scale sewer environment. Two chemical treatments are observed, RootX and Razorooter. Both herbicides stopped root growth for some time; however, some samples treated by RootX began to regrow roots within a year.
Abstract. There is a need in the USA to decrease dependency on fossil fuels. One alternative fuel that has gained much popularity in the past few years is biodiesel. Biodiesel can be produced using vegetable oil, waste vegetable oil (WVO), animal fat and yellow grease as raw materials. However, the process of converting a batch of WVO into usable biodiesel is time consuming, requires a human operator to run the system, and necessitates the performance of a chemical titration for each batch of biodiesel produced.In the first phase of this project, the processor was designed and built by the senior design students utilizing a programmable logic controller (PLC) in conjunction with pumps, valves, temperature sensors, etc. to completely handle the production of biodiesel with minimum operator interaction. This was the first step toward continuous flow processor and the elimination of the titration process. In the second phase of this project, the students integrated a small Hielscher Ultrasound continuous processing unit to the automated system. This paper presents the newly developed system and demonstrates the design aspects of the automated biodiesel production processor using a PLC and ultrasonication (continuous processing) as well as how the chemical titration procedure for each batch is eliminated.
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