多级高浓度活性污泥法脱氮除磷中试研究

Pilot-plant of multiplestage high concentrated activated sludge system for P and N removal

多级高浓度活性污泥法在不征地、不增加处理构筑物的情况下,以提高活性污泥浓度为指导思想,对现有城市污水处理厂进行升级改造,达到脱氮除磷的目的。中试研究表明,在试验条件下,出水CODCr为33～43mg/L,去除率92%左右;NH3-N为3～5mg/L,去除率90%左右;TP为1～1.7mg/L,去除率72%左右。系统保证了良好的脱氮除磷效果。

The exiting activated sludge process in wastewater treatment plant was reconstructed to multiple-stage high concentrated activated sludge system for P and N removal. No additional space occupation was required for upgrading. The pilot-plant results showed that best P and N removal, effluent with residual contents of 33 to 43 mg/L（removal rate 92%）, 3 to 5 mg/L（removal rate 90%） and 1 to 1.7 mg/L（removal rate 72%） for CODCr, NH3-N and TP respectively has been obtained.