In this study two types of biological contact oxidation processes(BCOP),a step-feed(SBCOP)unit and an inter-recycle(IBCOP)unit,were designed to investigate the treatment of heavily polluted river water.The Daqing Rive...In this study two types of biological contact oxidation processes(BCOP),a step-feed(SBCOP)unit and an inter-recycle(IBCOP)unit,were designed to investigate the treatment of heavily polluted river water.The Daqing River,which is the largest pollutant contributor to the Dianchi Lake,one of the most eutrophic freshwater lakes in China,was taken for the case study.It was found that the SBCOP had higher adaptability and better performance in the reduction of COD,TN,and TP,which made it applicable for the treatment of polluted river water entering the Dianchi Lake.Nitrification rate was observed to be greatly affected by the influent temperature.During each season,the nitrification in the SBCOP was higher than that in the IBCOP.TN removal efficiency in the SBCOP was higher than that in the IBCOP during the winter and spring but poorer during the summer,possibly due to the inhibition of denitrification by higher dissolved oxygen level in the summer.Moreover,symbiotic algaebacteria growth may be conducive to the removal of pollutants.展开更多
采用接触氧化与强化膜生物反应器联合处理系统(BCO-MBR)对模拟海水养殖对虾废水中有机物及氨氮的去除进行了试验研究,并对系统中实现短程硝化反硝化的可行性进行了探索.MBR出水中TOC及氨氮质量浓度水平稳定、处理效率高.联合处理系统对...采用接触氧化与强化膜生物反应器联合处理系统(BCO-MBR)对模拟海水养殖对虾废水中有机物及氨氮的去除进行了试验研究,并对系统中实现短程硝化反硝化的可行性进行了探索.MBR出水中TOC及氨氮质量浓度水平稳定、处理效率高.联合处理系统对TOC及氨氮的处理效果均较高,且系统亚硝酸盐氮的积累不明显.在联合处理系统中,膜污染情况得到有效缓解.MBR单独处理系统的膜污染情况比较严重,在15 d时出水压差已经达到30 k Pa.将BCO系统和MBR系统进行联合处理时,膜污染情况得到缓解,在系统进行到35 d时,出水压差依然在20 k Pa以下.展开更多
基金This study was supported by the National High Technology Research and Development Program of China(863 Program)(Grant No.2005AA601010-03)the National Natural Science Foundation of China(Grant No.50778001).
文摘In this study two types of biological contact oxidation processes(BCOP),a step-feed(SBCOP)unit and an inter-recycle(IBCOP)unit,were designed to investigate the treatment of heavily polluted river water.The Daqing River,which is the largest pollutant contributor to the Dianchi Lake,one of the most eutrophic freshwater lakes in China,was taken for the case study.It was found that the SBCOP had higher adaptability and better performance in the reduction of COD,TN,and TP,which made it applicable for the treatment of polluted river water entering the Dianchi Lake.Nitrification rate was observed to be greatly affected by the influent temperature.During each season,the nitrification in the SBCOP was higher than that in the IBCOP.TN removal efficiency in the SBCOP was higher than that in the IBCOP during the winter and spring but poorer during the summer,possibly due to the inhibition of denitrification by higher dissolved oxygen level in the summer.Moreover,symbiotic algaebacteria growth may be conducive to the removal of pollutants.
文摘采用接触氧化与强化膜生物反应器联合处理系统(BCO-MBR)对模拟海水养殖对虾废水中有机物及氨氮的去除进行了试验研究,并对系统中实现短程硝化反硝化的可行性进行了探索.MBR出水中TOC及氨氮质量浓度水平稳定、处理效率高.联合处理系统对TOC及氨氮的处理效果均较高,且系统亚硝酸盐氮的积累不明显.在联合处理系统中,膜污染情况得到有效缓解.MBR单独处理系统的膜污染情况比较严重,在15 d时出水压差已经达到30 k Pa.将BCO系统和MBR系统进行联合处理时,膜污染情况得到缓解,在系统进行到35 d时,出水压差依然在20 k Pa以下.