UROP Proceedings 2020-21

School of Engineering Department of Civil and Environmental Engineering 94 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: UROP3100, Spring This study aimed to investigate a new sulfur-cycle biotechnology for wastewater treatment. An expanded/ fluidized granular sludge bed reactor, using wood charcoal granules as the carrier, was being investigated for 220 days. The influent chemical oxygen demand (COD) was 300 mg/L, and the hydraulic retention time (based on expanded bed volume) was 20 hours. An overall COD removal efficiency of 47% obtained and the volumetric COD loading for expanded bed height was 0.40 kg/m3 /day. Sludge characterization was also determined. A new method was developed based on Wang’s Method to separate the organic-COD and the sulfide-COD from the total soluble COD in the effluent. Optimized Design of Urban Neighborhoods for Environmental Sustainability: The Effectiveness of Different Strategies Supervisor: YANG Jiachuan / CIVL Student: LI Sau Long / CIVL Course: UROP1100, Summer Global climate change and its related phenomenon leading to extreme temperatures have become an increasing threat to sustainability in cities. A variety of novel engineering materials, building technology and urban planning methods have been proposed in recent years as strategies to optimise thermal comfort and building energy efficiency. This project aims to review the potential strategies in the literature, comparing their impacts on urban canyons and the respective building energy efficiencies through numerical modelling (Urban Canopy Model). The effects of different strategies are tested through tweaking variables in the model simulation, providing Pareto fronts between thermal comfort and building efficiency and thus identify potential conflicts between the two. In this study, the effects of the strategies on the urban climate will be assessed. Population Exposure to Hazardous Weather under Climate Change Supervisor: YANG Jiachuan / CIVL Student: LEE Lok Hei / CIVL Course: UROP1000, Summer Occurrence of heat wave can impose serious impacts on human health, agricultural activity, the environment, and ecosystems. In view of climate change and resultant weather alteration, it is important to study how the future weather conditions may be different from the present one and prepare for it. In this study, we decided to place our focus on analyzing the future heat wave pattern and its possible effects in the Northern Hemisphere. We found that across the Norther Hemisphere, Africa will experience the greatest impacts under climate change. By studying how the maximum temperature and heat wave duration vary in the future, we are able to estimate the influence of extreme weather.