多级生物转鼓系统中有机物质的同步稳定化与氮去除

Simultaneous organic stabilization and nitrogen removal in multi-stage biodrum system.

作者信息

Chiemchaisri C, Liamsangoun C

机构信息

Department of Environmental Engineering, Kasetsart University, Chatuchak, Bangkok 10900, Thailand.

出版信息

Water Sci Technol. 2004;50(6):95-101.

PMID:15536995

Abstract

This paper presents the performance of a multi-stage biodrum system applied to domestic wastewater treatment. The organic stabilization and nitrogen removal efficiency in the system was investigated at different hydraulic retention times (HRT) of 12, 6 and 3 hours. The rotational speed of the biodrum was examined at 2,4 and 8 rpm. Average organic removal efficiencies in the system at different HRTs of 12, 6 and 3 hours were 96.3, 94.4 and 90.9%. Simultaneously, average nitrogen removal efficiencies were 91.5, 90.6 and 81.0%. The effect of rotational speed on nitrogen removal efficiencies in the system was clearly observed at a low HRT of 3 hours. The experimental results suggested that optimum HRT in the system was 6 hours. Moreover, they revealed that nitrogen removal efficiencies in the reactors operated at different rotational speed were in the same degree when considering the effluent nitrogen concentration. However, the reactors operated at lower rotational speed needed to employ higher numbers of biodrums (4 stages) than the others with higher rotational speed (3 and 2 stages at 4 and 8 rpm.) in order to achieve similar effluent qualities. At a rotational speed of 2 rpm, maximum nitrogen removal rate was found to be 0.2 kg/m3/d.

摘要

本文介绍了一种应用于生活污水处理的多级生物转鼓系统的性能。在12小时、6小时和3小时的不同水力停留时间（HRT）下，研究了该系统的有机稳定化和脱氮效率。考察了生物转鼓在2转/分钟、4转/分钟和8转/分钟的转速。在12小时、6小时和3小时的不同HRT下，系统的平均有机去除效率分别为96.3%、94.4%和90.9%。同时，平均脱氮效率分别为91.5%、90.6%和81.0%。在3小时的低HRT下，清楚地观察到转速对系统脱氮效率的影响。实验结果表明，该系统的最佳HRT为6小时。此外，结果显示，考虑到出水氮浓度，在不同转速下运行的反应器的脱氮效率处于同一水平。然而，为了达到相似的出水水质，与其他较高转速（4转/分钟和8转/分钟时分别为3级和2级）的反应器相比，较低转速运行的反应器需要采用更多数量的生物转鼓（4级）。在2转/分钟的转速下，最大脱氮速率为0.2千克/立方米/天。