UROP Proceedings 2020-21

School of Engineering Department of Civil and Environmental Engineering 93 Internet of Tree Things (IOTT) Supervisor: WANG Yu-Hsing / CIVL Student: CHAN Chun Yu / CIEV Course: UROP2100, Spring The first part of this report will focus on the isolating tree project that started the last semester. This report will first introduce Density-Based Spatial Clustering of Applications with Noise (DBSCAN) and show the result using this algorithm. The second part of the report will focus on Picus Sonic Tomograph and TreeTronic in tree diagnosis. This report will share the procedure of performing tree diagnosis and show the results of special tree conditions. The third part of this report will focus on the determination of the tree’s elastic modulus. This report will include the procedure, problems, and advice of the test. Finally, the fourth part of the report will focus on the tree pulling tests. This report will introduce the procedure of the test and the result. You will see a Hoopoe Supervisor: WANG Yu-Hsing / CIVL Student: KWOK Martin Ying Kit / CIVL Course: UROP1000, Summer “You will see a Hoopoe” is a sustainable smart campus project using innovative technology and AI-enabled camera to identify birds in the HKUST campus. In fact, birds play a very important role in the nature while HKUST campus is a perfect location for students to explore the nature. It is discovered that there are more than 46 species of birds live around the campus and we are trying to recognize these birds with the devices. The project is aiming at promoting the environmental awareness of bird protection through the green AI camera which is most advanced bird-watching system in Hong Kong. Coupling Sulfur-Driven Denitrification with Anammox for Wastewater Nitrogen Removal Supervisor: WU Di / CIVL Co-supervisor: CHEN Guanghao / CIVL Student: CHUI Wai Yuen Ivan / CIVL Course: UROP2100, Fall This study aimed to investigate a new sulfur-cycle biotechnology for wastewater treatment. The experiments were carried out to study the feasibility of three types of anaerobic sulfate reducing reactors, namely, (a) sulfate reducing UASB reactor without mechanical stirring, (b) fluidized granular sludge bed using 0.074 – 0.125 mm micro sand as growth media, and (c) fluidized granular sludge bed using 0.07 – 1.0 mm wood charcoal as growth media. These three reactors were seeded with anaerobic sludge from a food waste treatment plant. The influent COD was 500 mg/L, and the hydraulic retention time was 20 h. The results indicated that the sulfate reducing UASB reactor without mechanical stirring was unable to operate due to the lack of biogas formation for internal mixing. Fluidized bed reactor using micro-sand was also unable to operate smoothly due to the high density of sand. Fluidized bed reactor using wood charcoal was smoothly operated for 3 months. The COD removal achieved 55% and there was a significant growth in bacteria. Moreover, with charcoal, the upflow velocity in anaerobic reactor could be increased from 1m/h (for traditional UASB reactor) to 6m/h. In future, FISH test should be done to further study the communities of bacteria proliferated on the charcoal media; and in addition, more experiments should be done to figure out the optimum size range of charcoal.

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