前言本规范修订的主要技术内容有:增加水资源利用(包括再生水回用和雨水收集利用)、术语和符号、非开挖技术和敷设双管、防沉降、截流井、再生水管道和饮用水管道交叉、除臭、生物脱氮除磷、序批式活性污泥法、曝气生物滤池、污水深度处理和回用、污泥处置、检测和控制的内容; Foreword The main technical contents of the revision of this code are as follows: increase the utilization of water resources (including reclaimed water reuse and rainwater collection and utilization), terms and symbols, trenchless technology and double pipe laying, anti-settling, river shutoff, reclaimed water pipelines and drinking water pipelines Cross deodorization, biological nitrogen and phosphorus removal, sequencing batch activated sludge method, biological aerated filter, advanced treatment and reuse of sewage, contents of sludge disposal, detection and control;