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首页> 外文期刊>Ecological engineering: The Journal of Ecotechnology >Batch kinetics of nitrogen and phosphorus removal from synthetic wastewater by algae
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Batch kinetics of nitrogen and phosphorus removal from synthetic wastewater by algae

机译：藻类去除合成废水中氮和磷的间歇动力学

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摘要

Batch experiments were carried out to investigate the effect of the initial nitrogen and phosphorus concentrations on nutrient removal performance of microalgae Chlorella uulgaris and to determine biokinetic coefficients such as k; reaction rate constant,K_m,half saturation constant,and Y,yield coefficient by using Michaelis-Menten rate expression.The NH_4-N concentration was varied between 13.2-410 mgl~(-1) while PO_4-P concentration was between 7.7-199 mg l~(-1) by keeping N/P ratio around 2/1 in the synthetic wastewater.The experiments were performed at pH 7.0 and at room temperature (20+-2 deg C) with artificial illumination (4100 lux).Experimental results indicated that effluent water quality decreases with increasing nutrient concentrations and algae culture can remove nitrogen more effectively compared to phosphorus.Biokinetic coefficients were determined as k = 1.5 mg NH_4-N mg~(-1) chl a d~(-1),K_m = 31.5 mg l~(-1),Y_N = 0.15 mg chl a mg~(-1) NH_4-N for nitrogen and k = 0.5mg PO_4-P mg~(-1) chl a d~(-1),K_m = 10.5 mgl~(-1),Y_P =0.14 mg chl a mg~(-1) PO_4-P for phosphorus.
机译：进行批处理实验以研究初始氮和磷浓度对微藻小球藻营养去除性能的影响，并确定生物动力学系数，如k;反应速率常数，K_m，半饱和常数和Y，屈服系数通过Michaelis-Menten速率表达式表示。NH_4-N浓度在13.2-410 mgl〜（-1）之间变化，PO_4-P浓度在7.7-199之间通过在合成废水中将N / P比率保持在2/1左右来达到mg l〜（-1）。实验在pH 7.0和室温（20 + -2℃）以及人工照明（4100 lux）下进行。结果表明，污水中水质随养分浓度的增加而降低，藻类培养比磷更有效地去除了氮。生物动力学系数确定为k = 1.5 mg NH_4-N mg〜（-1）chl ad〜（-1），K_m = 31.5 mg l〜（-1），Y_N = 0.15 mg chl a mg〜（-1）NH_4-N氮，k = 0.5mg PO_4-P mg〜（-1）chl ad〜（-1），K_m ＝ 10.5mgl·（-1），Y_P ＝ 0.14mg chl a mg·（-1）PO_4-P。

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