Research progress of pretreatment of residual sludge by physical thermal hydrolysis
In the process of sewage treatment,a large amount of activated sludge will be produced,the problem of high treatment cost will inevitably arise due to the large output of sludge.The traditional sludge treatment method is to dry the sludge left by the water treatment process and then incineration,landfill,which will not only occupy a lot of land resources,but also produce harmful substances or gases will cause impact on the surrounding environment and soil,so it is necessary to take some reasonable pretreatment measures before sludge treatment.Sludge pretreatment can destroy the floccule stable structure in the sludge more effectively,release as much water in the sludge as possible,and then reduce the output of the sludge and the impact of it on the surrounding environment in the subsequent resource treatment process.The relevant technologies of sludge pretreatment in present are summarized from the physical aspects,pro-viding some ideas for the scientific research and utilization of sludge pretreatment.
municipal sludgephysical lawthermal hydrolysisresource utilization
万方数据
维普
