污水处理厂在净化污水的同时也产生了大量污泥,这些污泥集聚了污水中最有毒有害的物质,如处置不当,极易对环境造成二次污染。但由于处理和处置污泥需要大量基建投资和高昂的运行费用,在很多国家,污泥处理往往没有得到应有的重视。而日本,则不然。多年来,日本不断研发和采用新技术,不仅对所有污泥进行无害化处理,还尝试将污泥转化为沼气、固体燃料等能源,以减少污泥处理 Sewage treatment plants in the purification of sewage also produced a lot of sludge, the sludge collected the most toxic and harmful substances in the sewage, such as improper disposal, easily lead to secondary pollution of the environment. However, due to the large capital investment and high operating costs associated with sludge disposal and disposal, sludge disposal often fails to receive the attention it deserves in many countries. In Japan, it is not. Over the years, Japan has continuously developed and adopted new technologies that not only decontaminate all sludges but also try to convert the sludges into energy such as biogas and solid fuels to reduce sludge disposal