Zn2+、Mn2+对SBR工艺处理高盐肝素废水的影响

摘要

针对SBR工艺处理高盐肝素钠生产废水的好氧活性污泥,从金属离子间的拮抗效应和调节微生物酶的活性出发,研究了金属离子Zn2+、Mn2+对污泥性能的影响.试验结果表明,Zn2+和Mn2+的添加对肝素废水好氧处理过程中高浓度钠盐的抑制有一定的缓解作用,Zn2+和Mn2+质量浓度分别为5、2mg/L时系统对TOC的去除率最好,最优改善效果可达到15.6％、12.2％;Zn2+对氨氮去除率的影响暂不明显,Mn2+质量浓度为1 mg/L,最优氨氮去除率改善效果达12.8％,且作用时间较短时其效果越明显.%Aiming at the aerobic activated sludge for treating wastewater from high-salinity heparin sodium production in a SBR process,the influences of Zn2+ and Mn2+ on sludge performances have been studied based on the antagonistic effects of metal ions and the regulation of microbial enzymatic activities.The results indicate that the addition of Zn2+ and Mn2+ has certain release effect on the inhibition of highly concentrated sodium salt in aerobic treatment process of heparin-containing wastewater.When the mass concentrations of Zn2+ and Mn2+ are 5 mg/L and 2 mg/L,respectively,TOC removing rates are the best.The best improvement effects can reach 15.6％ and 12.2％,respectively.The influence of Zn2+ on ammonia nitrogen removing rate is not obvious temporarily.The improvement effect of the best ammonia nitrogen removing rate reaches 12.8％ when Mn2+ mass concentration is 1 mg/L.Furthermore,the shorter the action time,the more significant the effect.