红斑顠体虫的污泥减量效果

Sludge reduction effect of Aeolosoma hemprichi

为了实现红斑顠体虫捕食污泥减量化,对不同条件下红斑顠体虫的污泥减量效果进行实验研究。实验结果表明:红斑顠体虫的污泥减量速率随初始MLSS及温度的增大而增大,初始MLSS越高,污泥减量速率越大。污泥减量速率随红斑顠体虫密度变化率的增大而逐渐增大,当红斑顠体虫的密度增长率出现下降时,污泥减量速率也呈下降趋势。采用间歇曝气(12 h曝气,12 h停曝)方式,红斑顠体虫的污泥减量速率会显著下降。在污泥好氧消化时,红斑顠体虫能捕食污泥中的有机碎片和细菌,达到污泥稳定化的指标要求。

The sludge reduction by predation of Aeolosoma hemprichi as nutrients was studied. The effects of MLSS, temperature, aeration etc. on the sludge reduction were investigated. The experimental results showed that sludge reduction rate by predation of Aeolosoma hemprichi increased with the increasing of MLSS and temper- ature. The higher MLSS was, the faster sludge reduction rate was. The sludge reduction rate increased when Ae- olosoma hemprichi density change rate increased. The aeration also affected the sludge reduction rate by Aeoloso- ma hernprichi which decreased significantly during batch aeration （12 h aeration, 12 h no aeration）. In aerobic digestion of the sludge, predation of Aeolosoma hemprichi played the key role to accelerate sludge reduction rate.