铅对好氧颗粒污泥系统理化特性及性能影响的研究

通过对好氧颗粒污泥系统的理化指标测定与分析, 研究了不同浓度Pb2+对好氧颗粒污泥系统性能及稳定性的影响。结果表明: 铅在理论浓度为10 mg/L时, 对磷的去除产生显著影响, 去除率由50%下降到28%, 当铅浓度进一步加大时, 磷的去除率进一步下降, 最后维持在18%左右; 理论浓度高达50 mg/L时, NH4-N的去除效率开始下降, 最后维持在80%左右, 同时, MLSS下降, SV30上升, SVI急剧上升, 好氧颗粒逐渐解体, 沉降性能恶化; 而对于COD的去除, 在1~50 mg/L的理论浓度下, 产生一定的促进作用, 由最初的87%上升到93%左右。

Effects of Long-Term Addition of Lead on the Physical and Chemical Properties and Performance of Aerobic Granules Sludge

The research mainly focused on effects of long-term addition of lead on performance by physicochemical index and stability of aerobic granules sludge system. Results show that removal of phosphorus was affected significantly when the theoretical concentration of lead was 10 mg/L, and the removal efficiency decreased from 50% to 28%. When the concentration of lead had a further increasing, the phosphorus removal rate declined further, and finally maintained at about 18%. Removal efficiency of NH4-N began to decline when the theoretical concentration of lead was up to 50 mg/L, and finally maintained at about 80%. At the same time, the MLSS decreased, SV30 increased, SVI rose sharply, aerobic granular disintegrated gradually and settling charac- teristics deteriorated; but removal of COD increased from 87% to 93% within the range of 1?50 mg/L.