Pesticide Wastewater Treatment by a Membrane Bioreactor

The pesticide wastewater was treated using the membrane bioreactor (MBR).Experiments were carried out to investigate the effect of pH value,nutrition and influent CODCr on the performance of MBR.MBR showed high removal efficiency for the removal of CODCr,pesticide,turbidity and odor in the pesticide wastewater.The pollutant removal efficiency of MBR was significantly affected by pH and influent CODCr,the optimal conditions were under pH 8.0 and 1 500 mg/L of influent CODCr.The addition of nutrient salts showed slight effects on the removal efficiency of MBR,slightly stimulating effect was observed under low nutrient concentration.About 81.9%,94.9%,94.0%,88.6%,99.7%,97.5% and 100% of CODCr,total pesticide,acetochlor,metolachlor,butachlor and pretilachlor and turbidity in practical pesticide wastewater were removed through the membrane bioreactor under the optimal operation conditions,respectively.