连续流好氧颗粒污泥系统的稳定运行——通过调控回流比及有机负荷

李冬; 杨敬畏; 李悦; 张杰

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中国环境科学 ›› 2021, Vol. 41 ›› Issue (9) : 4149-4156.

水污染与控制

连续流好氧颗粒污泥系统的稳定运行——通过调控回流比及有机负荷

李冬¹, 杨敬畏¹, 李悦¹, 张杰^1,2

作者信息 +

Stable operation of aerobic granular sludge continuous flow system——by controlling reflux ratio and organic load

LI Dong¹, YANG Jing-wei¹, LI Yue¹, ZHANG Jie^1,2

Author information +

文章历史 +

摘要

室温下接种成熟的好氧颗粒污泥于由独立的厌氧池和好氧池组成的交替厌氧/好氧连续流系统中，成功通过控制混合液回流比和有机负荷实现了连续流好氧颗粒污泥工艺的稳定运行.结果表明，通过调控较低进水有机负荷（300mg/L）及较低回流比（200%）使连续流系统有较好的脱氮除磷性能，出水COD，TN和TP平均浓度分别为18.78，5.79和0.49mg/L，平均去除率分别为93.76%，84.3%和83.12%.在COD浓度为500mg/L时，长期运行的连续流系统缺乏饱食饥饿的环境胁迫，导致丝状菌的生长，系统性能的恶化.用平行因子模型对不同阶段的颗粒污泥和系统出水进行表征，结果表明，有机负荷对外源底物利用相关中间产物的产生有较大影响，进水COD为300mg/L时既能有较好的脱氮除磷性能，亦能有效降低出水中基质代谢中间产物的生成量，避免了为后续消毒工艺产生消毒副产物.因此在实际的城镇污水处理厂应用中，交替厌氧/好氧连续流长期在排放限额的有机浓度（500mg/L）下运行需要增加预处理设施降低进水有机负荷，以实现连续流好氧颗粒污泥的稳定运行.

Abstract

Inoculate mature aerobic granular sludge at room temperature in an anaerobic/aerobic alternate continuous flow system composed of independent anaerobic tanks and aerobic tanks, control the effect of mixed liquid reflux ratio and organic load on the removal of COD, TN and TP by anaerobic and aerobic alternating continuous flow process. The results showed that the two-stage continuous flow process can achieve better nitrogen and phosphorus removal performance by adjusting a lower reflux ratio when the influent organic load was low. The average concentration of COD, TN and TP in the effluent was 18.78, 5.79 and 0.49mg/L. The average removal rate was 93.76%, 84.3% and 83.12% respectively; when the organic load was higher, the long-term two-stage continuous flow system lacked the environmental stress of feast and famine, resulting in filamentous bacteria growth, deterioration of system performance. The model was used to characterize the granular sludge and system effluent at different stages. The results showed that the organic load has a greater impact on the production of intermediate products related to the utilization of foreign substrates. The influent with lower organic load could effectively reduce the generation of intermediate products in the effluent. In summary, in the actual secondary urban sewage treatment plant, the anaerobic/aerobic alternating continuous flow process was not suitable for long-term operation under the organic concentration (500mg/L) of the emission limit.

导出引用

李冬, 杨敬畏, 李悦, 张杰. 连续流好氧颗粒污泥系统的稳定运行——通过调控回流比及有机负荷[J]. 中国环境科学. 2021, 41(9): 4149-4156

LI Dong, YANG Jing-wei, LI Yue, ZHANG Jie. Stable operation of aerobic granular sludge continuous flow system——by controlling reflux ratio and organic load[J]. China Environmental Science. 2021, 41(9): 4149-4156

中图分类号： X703.1

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