Effects of explosive explosion shockwave pretreatment on sludge dewaterability.
The potential benefits and mechanism of explosive explosion shockwave pretreatment on sludge dewatering treatments were investigated in this study. Water content of sludge cake after centrifugation was used to evaluate sludge dewaterability. Particle size, viscosity, turbidity, and micrograph were determined to explain the observed changes in the pretreatment process. The results indicated that the optimal pretreatment condition, generating the lowest water content of sludge cake, was 25 g explosive and 96.7% original sludge water content. This condition resulted in the reduced particle size and viscosity as well as increased turbidity. Particle size and viscosity significantly contributed to enhance sludge dewaterability. Micrograph investigation indicated that explosive explosion shockwave pretreatment could rupture sludge flocs, release physically bound water, and extracellular substances into the solution, consequently enhancing sludge dewaterability.
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, 5 South Zhong guan cun Street, Hai dian District, Beijing 100081, PR China. cdychendayong@163.com
Dayong
D
Chen
Jun
J
Yang
D004867:Equipment Design; D019544:Equipment Failure Analysis; D053834:Explosive Agents / Q000737:chemistry*; D019220:High-Energy Shock Waves; D012722:Sewage / Q000737:chemistry*; D014227:Triazines / Q000737:chemistry*; D014867:Water / Q000032:analysis* / Q000737:chemistry*; D018508:Water Purification / Q000295:instrumentation* / Q000379:methods*
D053834:Explosive Agents; D012722:Sewage; D014227:Triazines; D014867:Water; C009160:cyclonite