摘要
为了对处理实际焦化废水微氧EGSB反应器污染物去除机理进行研究,建立了处理实际焦化废水微氧EGSB反应器内污染物质降解动力学模型,考察EGSB反应器启动和稳定运行阶段不同运行条件时COD去除效果,并分析动力学参数的变化。研究确定了处理实际焦化废水(进水COD 2 000 mg/L左右)微氧EGSB反应器在启动和稳定运行阶段所适用的基质降解模型,动力学常数vmax、KI、KS、vmax/KS、KS/KI分别为7.34×10-3h-1、197.76 mg/L、19.53 mg/L、3.7×10-4L/(h·mg)、0.10和2.4×10-2h-1、66.64 mg/L、44.07 mg/L、5.4×10-4L/(h·mg)、0.66;微氧EGSB反应器内颗粒污泥能够逐渐适应并高效降解焦化废水中污染物质,焦化废水中毒性污染物质对颗粒污泥的抑制程度是由KS/KI决定的,KS/KI越大,抑制程度越弱,处理实际焦化废水EGSB反应器启动和稳定运行阶段的KS/KI分别为0.04~0.1和0.66~0.74;液体上升流速Vup的提高能够明显提高最大比基质降解速率vmax,降低半饱和常数KS和抑制常数KI,最终强化微氧EGSB反应器的运行效果,稳定运行阶段COD去除率高达92.7%。
To research the removal mechanism of the pollutants in the micro-aerobic EGSB reactor treating coking wastewater,the dynamic models for the degradation of pollutants in the EGSB reactor treating coking wastewater were founded.Moreover,the COD removal of the micro-aerobic EGSB reactor for the start-up and stable operation stage was studied and synchronously dynamics constants were analyzed.The results confirmed the suitable pollutants-utilization dynamic model for the startup and the stable operation stage of the micro-aerobic EGSB reactor treating actual coking wastewater(with about 2 000 mg/L influent COD concentration).The dynamics constant values of vmax、KI、KS,vmax/KS、KS/KIfor the startup and the stable operation stage were 7.34 × 10-3h-1,197.76 mg/L,19.53 mg/L,3.7 ×10-4L/(h·mg),0.10 and 2.4 × 10-2h-1,66.64 mg/L,44.07 mg/L,5.4 × 10-4L/(h·mg),0.66,respectively.The granules in the micro-aerobic EGSB reactor could gradually adapt and then highly efficiently remove the pollutants in the actual coking wastewater.The inhibitory extent of the toxic or inhibitory compounds on the granules was decided by KS/KI,and the inhibitory extent tended to weaken as KS/KIwas increased.The KS/KIvalues for the startup and stable operation stage of the micro-aerobic EGSB reactor were 0.04 ~ 0.1 and 0.66 ~ 0.74,respectively.Increasing the liquid up-flow velocity Vup could make the maximum specific substrate removal rate vmaxincreasing,the half-saturation coefficient KSand inhibitor constant KIdecreasing and thus strengthen the operation effect of the micro-aerobic EGSB reactor.The COD removal efficiency of the micro-aerobic EGSB reactor at the stable operation stage could attain 92.7%.
出处
《环境工程学报》
CAS
CSCD
北大核心
2014年第5期1921-1926,共6页
Chinese Journal of Environmental Engineering
基金
山西省自然科学基金资助项目(2011011008-3)
山西省科技攻关项目(20120313008-2)
