| Membrane technology has been regarded as 21st century's water treatment technology around the world. Because it has some advantages, such as less energy consumption, low investment, simple operation and high treatment efficiency, etc, with respect to the conventional technologies. Researchers have gradually focused membrane technology to treat high concentration ammonia wastewater, as novel membrane materials, membrane configurations and operating modes have been ceaselessly appeared.A novel integrated membrane system, which constituted a gas membrane contactor (GMC) and a granular sludge membrane bioreactor (GSMBR), was constructed and proposed to treat high concentration ammonia wastewater in this dissertation. The mass transfer characteristics of GMC, the operating features of GSMBR and their applications to treat practical wastewater have been systematically investigated. The followings were the main contents of this dissertation:(1)The mass transfer characteristics of ammonia in high-strength wastewater in GMC was investigated. It could be more suitable to estimate mass transfer coefficients, removal efficiency and flux for easily ionized VCs, such as ammonia, according to the equilibrium concentrations of volatile substance instead of the total concentrations of VCs. Both the resistance of membrane and the resistance of feed side would be affected by the pH of feed, consequently influencing the overall mass transfer. The effect of pH on the rate of mass transfer could be described by equation . The predictions made by the equation and the experimental data met closely for the two different specifications of GMCs. The viscosity of the feed increased with the increase of the concentration of the VCs. The variation of K in the concentration range of 50mg·L-1～10000mg·L-1 was less than 5% whether the feed was buffered or not. The relationship between viscosity and the mass transfer...
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