碳达峰、碳中和模式下,污水处理厂应重新定义水环境目标,要做到“最大限度接纳,最大限度处理”的发展理念。剩余污泥的处理作为污水厂碳排放量最高的环节,要坚持因地制宜的原则和低碳节能的运行模式,尽可能地利用无机盐等清洁能源,逐步实现污泥处理的碳中和。总结了无机铝铁盐混凝剂的发展历程和标准的更替,同时提出了无机铝铁盐混凝剂的发展面临的新挑战,在“十四五”期间,针对铝铁盐的发展趋势,提出了目前无机铝铁盐混凝行业仍然存在产能过剩严重、资源利用不合理、企业数量多、生产规模小、企业产品结构雷同、中低档产品多、环境污染程度大等问题,认为无机铝铁盐混凝行业的发展重心需要从之前的外延型发展方式逐步转向内涵型发展方式。

Under the carbon peak and carbon neutralization model,sewage treatment plants should redefine their water environmental goals and achieve the development concept of“maximum acceptance and maximum treatment”.The treatment of surplus sludge should adhere to the principle of adapting measures to local conditions and a low-carbon and energy-saving operation mode by using clean energy as much as possible to gradually realize the carbon neutrality of sludge treatment.The development history of inorganic aluminum iron salt coagulant and the replacement of standards were summarized,and the new challenges faced by the development of inorganic aluminum iron salt coagulant was put forward.During the“14th FiveYear Plan,in view of the development trend of aluminum iron salt,it was proposed that there were still some problems in inorganic aluminum iron salt industry,such as serious overcapacity,unreasonable resource utilization,large number of enterprises,small production scale,similar product structure,many medium and low-grade products,and high degree of environmental pollution.It was considered that the development focus of inorganic aluminum iron salt industry needed to gradually change from the previous extension development mode to the connotation development mode.