中文摘要：

给水系统中细菌再生长是自来水管网水质恶化的主要原因之一，水中可同化有机碳（AOC）被认为是影响细菌再生长的主要因素。饮用水常规的处理工艺仅能去除约20％的AOC，不过生物预处理、臭氧-生物活性炭、纳滤可以有效去除AOC，从而提高饮用水生物稳定性。在保证水中消毒剂余量的前提下，常规处理结合深度处理去除AOC是控制细菌再生长的有效方式。

英文摘要：

Bacterial regrowth in water supply system is one of main reasons causing water quality deterioration in pipeline, and assimilable organic carbon （AOC） is the key factor of bacterial regrowth. The conventional treatment can only remove about 20% AOC. However, the advanced technologies such as biological pretreatment, O3- BAC and nano-membrane filtration, can remove AOC effectively and improve biological stability in drinking water. The combined processes of conventional treatment and these advanced ones are often applied in full-scale water purification facilities to remove AOC and control the bacterial regrowth with the premise of sufficient disinfectant residues.