盐度对废水生物处理的影响

Impacts of Salinity on Wastewater Biotreatment

研究了废水中不同含盐量对生化处理效果以及生物学变化规律的影响。在废水含盐量低于22 g/L时,废水生化处理系统对COD的去除率可稳定在70%左右,污泥活性良好;随着进水盐浓度的增加,含盐量达到22g/L时,污泥活性开始受到抑制,COD去除率急剧下降到50%左右;当废水含盐量达到31 g/L时,污泥活性明显受到抑制,污泥絮体开始部分解体,COD去除率下降到40%左右。

It is reported that salinity affects the wastewater biotreatment system as well as the impact of biology activity. When the wastewater salinity less than 22 g/L, wastewater biotreatment system can be stabilized at COD removal of around 70% , sludge activity is well. When the wastewater salinity to 22 g/ L, sludge activity begins inhibited, and COD removal sharp declines to around 50%. When the wastewater salinity to 31 g/L, sludge activity is significantly inhibited, sludge floc begins disintegrating, and COD removal rate drops to 40%.