López-Patiño Amanda M, Cárdenas-Orrego Ana, Torres Andrés F, Navarrete Danny, Champagne Pascale, Ochoa-Herrera Valeria
Colegio de Ciencias e Ingeniería, Universidad San Francisco de Quito USFQ, Quito, Ecuador.
Instituto de Microbiología, Universidad San Francisco de Quito USFQ, Quito, Ecuador.
Front Bioeng Biotechnol. 2024 Feb 26;12:1338547. doi: 10.3389/fbioe.2024.1338547. eCollection 2024.
In low-middle income countries (LMIC), wastewater treatment using native microalgal-bacterial consortia has emerged as a cost-effective and technologically-accessible remediation strategy. This study evaluated the effectiveness of six microalgal-bacterial consortia (MBC) from the Ecuadorian Amazon in removing organic matter and nutrients from non-sterilized domestic wastewater (NSWW) and sterilized domestic wastewater (SWW) samples. Microalgal-bacterial consortia growth, in NSWW was, on average, six times higher than in SWW. Removal rates (RR) for NH - N and PO -P were also higher in NSWW, averaging 8.04 ± 1.07 and 6.27 ± 0.66 mg L d, respectively. However, the RR for NO -N did not significantly differ between SWW and NSWW, and the RR for soluble COD slightly decreased under non-sterilized conditions (NSWW). Our results also show that NSWW and SWW samples were statistically different with respect to their nutrient concentration (NH -N and PO -P), organic matter content (total and soluble COD and BOD), and physical-chemical parameters (pH, T, and EC). The enhanced growth performance of MBC in NSWW can be plausibly attributed to differences in nutrient and organic matter composition between NSWW and SWW. Additionally, a potential synergy between the autochthonous consortia present in NSWW and the native microalgal-bacterial consortia may contribute to this efficiency, contrasting with SWW where no active autochthonous consortia were observed. Finally, we also show that MBC from different localities exhibit clear differences in their ability to remove organic matter and nutrients from NSWW and SWW. Future research should focus on elucidating the taxonomic and functional profiles of microbial communities within the consortia, paving the way for a more comprehensive understanding of their potential applications in sustainable wastewater management.
在中低收入国家（LMIC），利用本地微藻-细菌聚生体进行废水处理已成为一种具有成本效益且技术上可行的修复策略。本研究评估了来自厄瓜多尔亚马逊地区的六个微藻-细菌聚生体（MBC）从未灭菌生活污水（NSWW）和灭菌生活污水（SWW）样本中去除有机物和营养物质的效果。NSWW中微藻-细菌聚生体的生长平均比SWW高六倍。NSWW中NH - N和PO - P的去除率（RR）也更高，平均分别为8.04±1.07和6.27±0.66 mg L d。然而，SWW和NSWW之间NO - N的RR没有显著差异，并且在未灭菌条件下（NSWW）可溶性COD的RR略有下降。我们的结果还表明，NSWW和SWW样本在营养物浓度（NH - N和PO - P）、有机物含量（总COD和可溶性COD以及BOD）和物理化学参数（pH、T和EC）方面存在统计学差异。MBC在NSWW中增强的生长性能可能合理地归因于NSWW和SWW之间营养物和有机物组成的差异。此外，NSWW中存在的本地聚生体与本地微藻-细菌聚生体之间的潜在协同作用可能有助于提高这种效率，这与未观察到活跃本地聚生体的SWW形成对比。最后，我们还表明，来自不同地区的MBC在从NSWW和SWW中去除有机物和营养物质的能力方面表现出明显差异。未来的研究应侧重于阐明聚生体内微生物群落的分类和功能概况，为更全面了解它们在可持续废水管理中的潜在应用铺平道路。
