UASB-絮凝-SBR处理高含量头孢类抗生素废水

TREATMENT OF HIGH CONCENTRATIONS OF CEPHALOSPORIN ANTIBIOTIC WASTEWATER WITH UASB-FLOCCULATION-SBR

采用上流式厌氧污泥床(UASB)-絮凝-序批式活性污泥法反应器(SBR)组合工艺处理高含量头孢类抗生素废水,考察了3个废水处理阶段中的COD去除效果。结果表明,当进水COD为14.3 g/L、容积负荷在14.3 kg/(m.3d)时,UASB反应器的COD去除率稳定在85%左右,出水VFA的浓度在3 mmol/L左右,产气体积流量为17 L/d左右;对UASB出水进行絮凝处理以去除废水中难降解大分子物质,按每1L厌氧出水投加25 mL的PFC和5 mL的PAM后,废水COD由2.279g/L降至1.133g/L,去除率为50.3%;使用SBR处理絮凝后上清液,当反应器负荷为1.2kg/(m.3d)时,出水COD在200 mg/L以下,去除率稳定在80%左右,达到GB 21903-2008中的抗生素类废水排放要求。

The high concentrations of cephalosporin antibiotic wastewater was treated by the Combination process of UASB-flocculation-SBR, The COD removal efficiency oft he three stages of wastewater treatment was the main investigation. The results showed that： when the influent COD was 14.3 g/L and the volume loading was 14.3 kg/（m3.d）, the COD removal rate kept at 85%, the effluent VFA was around 3 mmol/L. The gas production was about 17 L/d; Flocculation was used to the remove of the non-biodegradable macromolecular organic matters in the UASB effluent, Every 25 mL PFC and 5 mL PAM were dosed into IL UASB effluent, the wastewater COD decreased from 2.279 g/L to 1.133 g/L, with the 50.3% removal rate; The SBR was used to treat the effluent of the flocculation process, when the volume loading was 1.2 kg/（m3·d）, effluent COD was under 200 mg/L with 80% of the removal rate, which can meet Antibiotic wastewater discharge standards of GB 21903--2008.