超声对低水温SBR污泥性能及群体感应的影响  

Effects of Ultrasonic Wave on Properties and Quorum Sensing of Sludge in SBR with Low Water Temperature

作　　者：陶艺 员建 马华继[1,2,3] 李道甲 王美丽[5] 史新盼 冯家举 TAO Yi;YUAN Jian;MA Hua‑ji;LI Dao‑jia;WANG Mei‑li;SHI Xin‑pan;FENG Jia‑ju(School of Environmental and Municipal Engineering,Tianjin Chengjian University,Tianjin 300384,China;Tianjin Key Laboratory of Aquatic Science and Technology,Tianjin 300384,China;Joint Research Centre for Protective Infrastructure Technology and Environmental Green Bioprocess,Tianjin Chengjian University,Tianjin 300384,China;Shanghai Emperor of Cleaning Technology Co.Ltd.,Shanghai 200437,China;Tianjin Urban Road Pipeline Network Complete Set Construction Investment Co.Ltd.,Tianjin 300381,China)

机构地区：[1]天津城建大学环境与市政工程学院,天津300384 [2]天津市水质科学与技术重点实验室,天津300384 [3]天津城建大学基础设施防护和环境绿色生物技术国际联合研究中心,天津300384 [4]上海洗霸科技股份有限公司,上海200437 [5]天津城市道路管网配套建设投资有限公司,天津300381

出　　处：《中国给水排水》2024年第1期76-81,共6页China Water & Wastewater

基　　金：国家重点研发计划“政府间国际创新合作”重点专项(2019YFE0122400)。

摘　　要：通过建立连续流超声调控低水温SBR系统,分析超声调控对低水温活性污泥性能及群体感应的影响。结果表明,在15℃低水温条件下,超声调控SBR系统的污泥产率系数(Yobs)降低至0.306 kgVSS/kgCOD,污泥减量率(SRE)为44.77%。超声调控并不影响活性污泥的正常沉降和系统的稳定运行,系统污泥容积指数(SVI)为121.2~148.0 mL/g,COD去除效果稳定,出水COD可达22 mg/L。活性污泥胞外聚合物(EPS)含量升高,多糖和蛋白质含量分别升至74.71和29.23 mg/gMLSS,提高了63.2%和36.8%。超声调控对活性污泥信号分子浓度有较大影响,C4-HSL浓度为0.1966μg/L,单位质量污泥的信号分子含量为0.044μg/gMLSS,分别为对照反应器的2.56和2.44倍。超声调控还导致C6-HSL、C7-HSL、C8-HSL、C10-HSL、C12-HSL和C14-HSL等信号分子浓度显著降低。This paper established a continuous‑flow ultrasonic SBR system for low temperature wastewater treatment,and investigated the effects of ultrasonic wave on the properties and quorum sensing of activated sludge at low temperature.When the wastewater temperature was 15℃,the yield coefficient(Yobs)of sludge in the ultrasonic SBR system decreased to 0.306 kgVSS/kgCOD,and the sludge reductionrate(SRE)was 44.77%.Ultrasonic wave did not affect the settling performance of activated sludge and the stability of the system.The sludge volume index(SVI)of the sludge in the system was between 121.2 mL/g and 148.0 mL/g.Stable COD removal performance was obtained,and the effluent COD reached 22 mg/L.The extracellular polymeric substances(EPS)content of activated sludge increased,and the polysaccharide and protein contents increased to 74.71 mg/gMLSS and 29.23 mg/gMLSS,respectively,which increased by 63.2%and 36.8%,respectively.Ultrasonic wave significantly affected the concentration of signal molecules in activated sludge.The concentration of C4‑HSL was 0.1966μg/L,and the signal molecule content per unit mass of sludge was 0.044μg/gMLSS,which was 2.56 times and 2.44 times of that of the control reactor,respectively.Ultrasonic wave also resulted in the significant decrease of the concentrations of signal molecules such as C6‑HSL,C7‑HSL,C8‑HSL,C10‑HSL,C12‑HSL and C14‑HSL.

关 键 词：超声 低水温 污泥性能 群体感应 

分 类 号：TU992[建筑科学—市政工程]