简要分析了生物、化学、物理化学三类除氨方法的优缺点；
The advantages and disadvantages of ammonia removal by biological, chemical and physical chemical methods are analyzed.
本文对哈三电厂的粉煤灰进行了物理化学性能研究分析，在此基础上，对哈三电厂的粉煤灰进行了品质评定；
The physical and chemical properties of the coal ash of Harbin Third Power Plant (HTPP) were conducted. Based on that, the quality of HTPP's coal ash was evaluated.
脉冲电压波形主要影响废水处理的三个物理化学过程，即：电容效应、液相传质、吸附和脱吸附。
The effects of pulse voltage waveform on physical and chemical water treatment processes include double layer capacitor effect, mass transport, absorption and deabsorption on the surface of electrode.
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