On-line Monitoring for Phosphorus Removal Process and Bacterial Community in Sequencing Batch Reactor

For efficient energy consumption and control of effluent quality, the cycle duration for a sequencing batch reactor (SBR) needs to be adjusted by real-time control according to the characteristics and loading of waste-water. In this study, an on-line information system for phosphorus removal processes was established. Based on the analysis for four systems with different ecological community structures and two operation modes, anaerobic-aerobic process and anaerobic-anaerobic process, the characteristic patterns of oxidation-reduction potential (ORP) and pH were related to phosphorous dynamics in the anaerobic, anoxic and aerobic phases, for determination of the end of phosphorous removal. In the operation mode of anaerobic-aerobic process, the pH profile in the anaerobic phase was used to estimate the relative amount of phosphorous accumulating organisms (PAOs) and glycogen accumulat-ing organisms (GAOs), which is beneficial to early detection of ecology community shifts. The on-line sensor val-ues of pH and ORP may be used as the parameters to adjust the duration for phosphorous removal and community shifts to cope with influent variations and maintain appropriate operation conditions.

提升铜渣浸出氯气利用率的技术探索

氯气浸出技术分为全浸和选浸,镍电解铜渣浸出采用氯气全浸技术以回收除铜渣中的镍、铜等金属,通过控制浸出电位,将硫及贵金属抑制在浸出渣中进一步处理。由于氯浸尾气含氯高,造成氯气消耗多,液碱用量大。本文梳理了铜渣浸出系统技术问题及难点,制定了详细的工艺技术路线及解决方案,如调节料浆加入量氯气流量恒定控制、浸出电位在线监测等,为提升氯气利用率,总结出了一种切实可行的技术方案。