Research On The Effect And Mechanism Of Cationic Surfactants On The Dewaterability Of Activated Sludge

As the rate of municipal and industrial wastewater treatment goes up, the amount of sludge produced in the treatment process increases a lot. Since the sludge contains large proportion of water (more than 99.5%), and its dewaterability is poor, thus resulting in the increasement of cost of sludge treatment and disposal. As a result, how to enhance the dewaterability of sludge and reduce the cost of sludge treatment becomes an important research interest in the world.Using physical, chemical and biological conditioning methods to pretreat sludge can change the physical characterization and chemical composition of sludge flocs, destroy the sludge colloid structure and reduce the affinity between water and colloid particles, thus improving the dewaterability of sludge. The medicament conditioning becomes a common method because of simple operation and low cost. At present, sludge conditioners in the market are mostly cationic macromolecular flocculants which can bring about good solid-liquid separation through...