缺氧/好氧交替连续流的生活污水好氧颗粒污泥运行及污染物去除机制

室温下接种成熟的好氧颗粒污泥于由独立的缺氧池和好氧池组成的缺氧/好氧交替连续流系统中，以实际生活污水为进水基质，探究曝气强度和水力停留时间对连续流系统的影响.研究表明在回流比为2，较小的曝气强度（0.6mL·min^-1）和适当的水力停留时间（9 h）条件下更有利于污染物的去除，此时TP平均去除率为80.43%，TN平均去除率为83.6%，COD平均去除率为90.39%，污泥浓度为2100 mg·L^-1左右，污泥体积指数保持在50 mL·g^-1以下，颗粒粒径在700~800 nm之间.用EEM-PARAFAC模型对不同阶段的EPS表征结果表明，EPS组成成分随着运行参数的改变而改变，水力停留时间对连续流系统有更大的影响.此外通过高通量测序的方法评估连续流系统中的微生物多样性，建立污染物去除模型，并在系统中发现了与脱氮除磷相关的11种主要功能菌.

Aerobic Granular Sludge Operation and Nutrient Removal Mechanism from Domestic Sewage in an Anaerobic/Aerobic Alternating Continuous Flow System

Mature aerobic granular sludge was inoculated at room temperature in an anaerobic/aerobic alternating continuous flow system. The system consisted of two independent anaerobic and aerobic tanks. Actual domestic sewage was used as the influent to explore the influence of the gas intensity and hydraulic residence time on the continuous flow system. The results revealed that the conditions of a reflux ratio of 2, lower aeration intensity (0.6 mL·min^-1), and proper hydraulic residence time (9 h) were more conducive to the removal of pollutants. Under such conditions, the average removal rate of TP was 80.43%, the average removal rate of TN was 83.6%, the average removal rate of COD was 90.39%, the sludge concentration was approximately 2100 mg·L^-1, the sludge volume index was maintained below 50 mL·g^-1, and the particle size was 700-800 nm. The EEM-PARAFAC model was used to characterize and analyze the EPS at different stages. The results revealed that changing the parameters could change the composition of EPS. The hydraulic residence time had a greater impact on the continuous flow system than the aeration intensity. In addition, a preliminary conceptual reaction process model in the anaerobic/aerobic alternating continuous flow system was built using high-throughput pyrosequencing and phylogenetic assignment. Eleven major functional bacteria related to nitrogen and phosphorus removal were found in the system.