在次生流出物排入受纳水体之前对其进行进一步处理可以缓解水体富营养化。在这项研究中,在膜光生物反应器中培养蛋白小球藻以进一步从次级流出物中除去氮。研究了水力停留时间(HRT)对微藻生物量产量和养分去除的影响。结果表明,在低HRT条件下,悬浮液中可溶性藻产物浓度降低,从而减轻微藻生长抑制。此外,较低的HRT通过逐步淘汰与氮相关的功能细菌来降低蛋白质小球藻生长的氮限制。因此,蛋白小球藻的生产率从HRT为24小时时的6.12mg/L/天增加到HRT为8小时时的20.18mg/L/天。最高去除率为19.7mg/L/天,23.8毫克/升/天,在总氮(TN)的HRT为8小时时达到105.4mg/L/天,氨,和化学需氧量(COD),分别。然而,在去除率方面,当HRT为24小时时,TN和COD最大,分别为74.5%和82.6%。当HRT为8小时时,氨氮的最大去除率为99.2%。
Further treatment of secondary effluents before their discharge into the receiving water bodies could alleviate water eutrophication. In this study, the
Chlorella proteinosa was cultured in a membrane photobioreactor to further remove nitrogen from the secondary effluents. The effect of hydraulic retention time (HRT) on microalgae biomass yields and nutrient removal was studied. The results showed that soluble algal products concentration reduced in the suspension at low HRT, thereby alleviating microalgal growth inhibition. In addition, the lower HRT reduced the nitrogen limitation for
Chlorella proteinosa\'s growth through the phase-out of nitrogen-related functional bacteria. As a result, the productivity for
Chlorella proteinosa increased from 6.12 mg/L/day at an HRT of 24 hr to 20.18 mg/L/day at an HRT of 8 hr. The highest removal rates of 19.7 mg/L/day, 23.8 mg/L/day, and 105.4 mg/L/day were achieved at an HRT of 8 hr for total nitrogen (TN), ammonia, and chemical oxygen demand (COD), respectively. However, in terms of removal rate, TN and COD were the largest when HRT is 24 hr, which were 74.5% and 82.6% respectively. The maximum removal rate of ammonia nitrogen was 99.2% when HRT was 8 hr.