An experimental study of low concentration sludge settling velocity under turbulent condition

作者：Guo Lisha; Zhang Daijun^*; Xu Danyu; Chen Yuan

来源：Water Research, 2009, 43(9): 2383-2390.

DOI：10.1016/j.watres.2009.02.032

• Low concentration sludge
• PIV
• Sludge settling velocity
• Turbulence intensity

Particle Image Velocimetry (PIV) was used to study the settling of activated sludge flocs under turbulent flow conditions. Experimental results showed that a larger particle diameter led to a higher settling velocity while the higher turbulence intensity led to lower settling velocity. Based on the measurements a mathematical relation has been derived which correlates the settling velocity for individual sludge flocs under turbulent conditions through a modified Vesilind equation. Settling velocity shows a power-type relation to sludge particle diameter and an exponential-type relation with turbulence intensity and sludge concentration.

• 出版日期2009-5
• 单位天津市环境保护科学研究院; 重庆大学