SBR法处理高盐肝素废水运行参数优化研究

Study on Operation Parameter Optimization of High Salt Heparin Wastewater Treatment by Sequencing Batch Reactor Process

采用SBR法处理高盐肝素钠生产废水,探讨了曝气时间、进水p H、温度等参数对COD和氨氮降解效果及污泥生长的影响。结果表明,控制曝气时间为10 h、进水p H为7.5、反应温度在26-29℃时,COD和氨氮去除率均能稳定在85%以上;对氨氮去除效果较差的反应器,适当添加K＋、Ca2＋、Mg2＋可以取得一定的改善作用,其中K＋对Na＋和NH4＋双重毒性抑制的拮抗效应最明显;经参数优化后的SBR反应器对不同污泥负荷和盐度负荷具有较好的适应能力,受到冲击后COD和氨氮去除率均能在2-3个运行周期内恢复至90%以上。

High salt heparin sodium production wastewater is treated by sequencing batch reactor（ SBR）. The effects of aeration time,water p H,temperature on the COD and ammonia biodegradation and sludge growth are investigated. Results indicate that,COD and ammonia removal rate can stabilize at more than 85% when the aeration time is 10 h,water p H 7.5 and temperature 26 to 29℃. Adding K＋,Ca2 ＋,Mg2 ＋appropriately can get some improvement for ammonia removal in less effective reactor,in which the antagonistic effect of K＋on dual- toxic inhibition of Na＋and NH4 ＋is most obvious. At optimum conditions,SBR reactor has better adaptability for different sludge and salinity loadings and COD and ammonia removal rates both can recover to more than 90% within running 2 ~ 3 cycles after the loading shock.