含对苯二甲酸有机废水厌氧降解动力学

Anaerobic degradation kinetics for organic wastewater containing terephthalic acid(TA)

含易降解有机物的对苯二甲酸（ＴＡ）有机废水在厌氧处理时，其中易降解有机质通过甲烷发酵被优先利用，其中间代谢物对对苯二甲酸的降解有抑制作用，同时，ＴＡ自身的降解也存在底物抑制现象本文建立了有易降解有机质存在时ＴＡ厌氧降解的抑制动力学模型方程并利用非残性回归，确定了模型参数实验数据对该动力学方程能较好地拟合在此基础上提出了两段厌氧处理新工艺。

The fact of preferential substrate utilization results in a sequence of substrate attack. As typically, the easily biodegradable substrates are degraded first through methane fermentation pathway, and just those intermediate metabolites have been proved to be inhibitors for TA biodegradation. Moreover, TA itself can inhibit the TA biodegradation. A kinetic model for the anaerobic digeshon of wastewater containing both TA and easily biodegradable pollutants is constructed as q = qmax. The model pal'alneters are esh mated with non ne ar re gre s sion method, the values are as follows' qmax= TA/L, the experimental data verification for the model equation is satisfactory. According to the model analysis, a new strategy, a two -step anaerobic system, for dealing with this kind of wastewater is suggested.