微动力曝气SBR工艺脱氮除碳及降解SDBS动力学研究

为了设计建立一套基于跌水曝气的新型间歇式活性污泥床反应器,省去滗水器,采用跌水曝气代替机械曝气,实现微动力曝气,降低运行能耗,本实验重点研究反应器启动特性、运行效果及影响因素,探究对典型污染物阴离子表面活性剂的降解特性,利用SEM、FT-IR及UV-Vis等技术进行表征,并对其生物降解动力学进行分析.结果表明,经150...

Kinetics of Nitrogen and Carbon Removal and Degradation of SDBS in SBR Process with Micro-power Aeration

A novel sequencing batch reactor (SBR) based on falling aeration was designed and built for wastewater treatment with anionic surfactants without the decanterto realize micro-dynamic aeration to reduce energy consumption. The starting process, operation effect and influencing factors of the SBR were investigated, and the degradation characteristics of anionic surfactants were discussed. Activated sludge was analyzed in terms of biodegradation kinetics, and characterized by using SEM, FT-IR and UV-Vis. The results showed that the COD, TN and NH₄+-N concentrations of the effluent from the novel SBR reactor were 10, 4.0 and 3.4 mg·L?1, respectively after the sludge were activated for 150 days, with their removal rates being 94.0%, 88.2% and 86.9%, respectively. The novel SBR process was 21.2% higher in removal rates of TN than compared with the traditional SBR process. The circulating upflow air velocity of the SBR process was controlled at 4.52 m·h?1 (Reflux ratio R=1.8∶1; hydraulic retention time T=3 days). The degradation rate of typical pollutant anionic surfactant in the novel SBR reactor was 81.3%. The degradation process conforms to the first-order biodegeneration kinetic equation.