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首页> 外文期刊>International Journal of Dairy Technology >Performance and biomass kinetics of activated sludge system treating dairy wastewater.
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Performance and biomass kinetics of activated sludge system treating dairy wastewater.

机译：活性污泥系统处理乳品废水的性能和生物质动力学。

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摘要

The performance and bio-kinetic coefficients of the activated sludge process (ASP) treating synthesised dairy wastewater were evaluated in a lab-scale setup. The step-loading experiment showed that the chemical oxygen demand (COD) removal efficiency, in general, increased with increasing influent wastewater COD concentration from 180 to 1200 mg/L (correlation coefficient was 0.80). The COD removal efficiency ranged from almost 80-88.4% depending on the COD concentration of the influent wastewater. Also, it could be stated that the ASP was probably underfed with organics at COD concentrations <725 mg/L. Monod, Moser, Contois and Chen & Hashimoto substrate utilisation models, relating the growth of micro-organisms to substrate utilisation, were employed to describe the bio-kinetics of the ASP at an organic loading rate of 1200 mg/L. Amongst them, the Contois and Monod models predicted the bio-kinetic reactions of the ASP very well with coefficient of determination (R2) values of 0.95 and 0.93, respectively. The estimated bio-kinetic coefficients of the Contois model (on COD basis) were as follows: half-velocity constant (0.20 mg/L), maximum substrate utilisation rate (3.13 per day), biomass yield coefficient (0.68), endogenous decay coefficient (0.07 per day) and maximum specific growth rate (2.13 per day).
机译：在实验室规模的设备中评估了活性污泥工艺（ASP）处理合成乳制品废水的性能和生物动力学系数。逐步加载实验表明，化学需氧量（COD）的去除效率通常随着进水废水中COD浓度从180 mg / L增加到1200 mg / L而增加（相关系数为0.80）。根据进水废水的COD浓度，其COD去除效率约为80-88.4％。同样，可以说在COD浓度<725 mg / L的情况下，ASP可能会被有机物不足。将Monod，Moser，Contois和Chen＆Hashimoto的底物利用模型（将微生物的生长与底物利用联系起来）用于描述有机负载率为1200 mg / L时ASP的生物动力学。其中，Contois模型和Monod模型预测ASP的生物动力学反应非常好，测定系数（R 2 ）分别为0.95和0.93。 Contois模型的估计生物动力学系数（基于COD）如下：半速度常数（0.20 mg / L），最大底物利用率（每天3.13），生物量产量系数（0.68），内生衰减系数（每天0.07）和最大特定增长率（每天2.13）。

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