中文摘要：

为了促进解偶联剂作用下活性污泥减量化效果及污泥沉降性能,本研究在序批式活性污泥工艺的设施中同时添加解偶联剂和纳米磁粉,分析其协同作用下对活性污泥性能产生的影响.研究发现2,4,5-三氯苯酚（TCP）单独作用下污泥减量达41%,但活性污泥基质降解性能及沉降性能降低,而纳米磁粉与TCP联合作用下污泥减量仍达34%,且对C、N、P去除效能和污泥沉降性能均无明显影响.运行31 d后,脱氢酶活性提高10%～18%,且具有一定的时间累积效应;在光学显微镜下观察可发现污泥絮体结构紧实,原生动物和后生动物种类和数量增多.结果还表明,在活性污泥工艺中运用纳米磁粉与TCP协同作用可抑制剩余污泥的产生,并能提高活性污泥系统的运行效能.

英文摘要：

For improving the performance and sludge settling property of an activated sludge reduction process with uncoupler,in this investigation,uncoupler and nano-sized magnetic particles were added simultaneously to a sequencing batch reactor for exploring their synergistic effects to the characteristics of activated sludge.The results showed that the volume reduction of sludge reached 41% with single 2,4,5-Trichlorophenol（TCP） Comparing with the control experiment,the biodegradability and settling properties of the activated sludge decreased.Under the actions of TCP combined with nano-sized magnetic particles,the volume reduction of sludge reached 34%,the removal efficiencies of COD,nitrogen,and phosphorus as well as the sludge settling property were not significantly influenced.After 31d’s operation,the dehydrogenase activity was improved by 10%-18% and exhibited an accumulative effect over time.It was observed with an optical microscope that the species and amounts of protozoon and metazoan increased and a compact structure of sludge floc was formed.The results also indicated that using nano-sized magnetic particles and uncoupler could restrict the yield of excess sludge and improve the performance of an activated sludge system.