NaCl和KCl对厌氧污泥抑制的动力学研究

在厌氧颗粒污泥和厌氧絮状污泥系统中,进行盐质量浓度(NaCl或KCl质量浓度,下同)对厌氧污泥抑制动力学的研究,得到不同拟合的COD降解动力学方程及参数.实验结果表明:当盐质量浓度为10～30 g/L时,KCl对厌氧污泥的COD比降解速率的抑制程度大于NaCl;当盐质量浓度由0 g/L增至10 g/L时,半速率常数逐渐增加;当盐质量浓度由10 g/L增至30 g/L时,半速率常数逐渐减小;在厌氧污泥系统中,NaCl抑制作用下的盐抑制常数高于KCl,且颗粒污泥的盐抑制常数高于絮状污泥.

Kinetics Study of Inhibiting Action of NaCl and KCl on Anaerobic Sludge

The kinetics of inhibiting action of salt (NaCl and KCl) mass concentration on anaerobic granular sludge and activated sludge were studied obtaining the fitted kinetics equations and parameters for COD degradation. The experimental results show that; When the salt mass concentration is 10 -30 g/L, the inhibiting action of KCl on the COD specific degradation rate by anaerobic sludge is stronger than that of NaCl; The half rate constant increases with the increasing of the salt mass concentration from 0 g/L to 10 g/L, but decreases with its increasing from 10 g/L to 30 g/L; In anaerobic sludge system, the salt inhibition constant of NaCl is larger than that of KCl, and the salt inhibition constant on anaerobic granular sludge is larger than that on anaerobic activated sludge.