【摘要】 考察了化学生物絮凝 /悬浮填料床工艺处理低浓度城市污水的效果,并确定了最佳的运行条件。试验结果表明:在PAFC投量为 70mg/L(以Al2O3 计为 9. 7mg/L)、PAM投量为 0. 5mg/L、污泥回流比为 33%左右、悬浮填料床气水比为 2∶1,以及化学生物絮凝池各廊道的DO值分别为 1. 9~3. 2、1. 3 ~2. 5、0. 3 ~1. 5mg/L的条件下,处理COD为 105 ~255mg/L、TP为 1. 56 ~7. 97mg/L、SS为 60~228mg/L、NH3 -N为 8. 33~18. 05mg/L的城市污水时,对COD、TP、SS的去除率分别为 75. 8%、76. 2%和 90. 6%,对NH3 -N的去除率 >85%。出水COD、TP、SS、NH3 -N浓度均满足《污水综合排放标准》(GB8978—1996)的一级标准。更多还原

【Abstract】 Chemical-biological flocculation / suspended carrier bed process was used for treatment of low strength municipal wastewater in order to find the optimum operating parameter. The result shows that in the treatment of municipal wastewater with COD 105-255 mg/L, TP 1.56-7.97 mg/L, SS 60-228 mg/L, NH₃-N 8.33-18.05 mg/L under the conditions of PAFC dosage 70 mg/L （9.7 mg/L based on Al₂O₃）, PAM dosage 0.5 mg/L, sludge return ratio 33%, air/water ratio 2∶1, and DO 1.9-3.2, 1.3-2.5 and 0.3-1.5 in each channel, the removal rate of COD, TP, and SS is 75.8%, （76.2）%, and 90.6% respectively, and NH₃-N removal rate is more than 85%. The effluent COD, TP, SS, and NH₃-N concentration meets I-class criteria specified in Integrated Wastewater Discharge Standard.更多还原