重力式下水道溶氧與生物動力之研究

• Main Authors: Liao Yi-Ching, 廖宜慶
• Other Authors: C.F. Ouyang
• Format: Others
• Language: zh-TW
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/73022723138798803637

碩士 === 國立中央大學 === 土木工程研究所 === 87 === The overall oxygen transfer coefficient (KL) and diffusion coefficient (D) of gravity flow are determined in a 21.7m long and 0.15 diameter experimental sewer. Monitoring the change of water quality after seeding, and put the water quality datas in use biological dynamics model. The discussion of water quality factors in model including SA(fermentable readily biodegradable), SA (volatile fatty acide), XBW(heterotrophic active biomass in water phase), XS1 ( hydrolysible substrate , fast biodegradable), XS2 (hydrolysiblesubstrate , slowly biodegradable) and Dc(dissolved oxygen). All of biological process in model are including Aerobic growth in bulk water, Aerobic growth in biofilm, Maintenance energy requirement, Aerobic hydrolysis, Anaerobic hydrolysis, Fermentation in bulk water and biofilm and Reaeration. The experimental results show that oxygen transfer coefficient (KL) are related with diffusion coefficient, velocity and mean hydraulic depth. The relationship with diffusion coeffieient (D) and velocity (U) are D=AeBU. The Model are calibrated by experimental sewer, and both of them have a high correlation. Finally, the results can discuss in oxygen tranfer and water quality changed in field.