Algae bioremediation of swine and domestic wastewater promotes a reduction of coliforms and antibiotic-resistant bacteria

IF 7.6 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Pollution Pub Date : 2025-04-21 DOI:10.1016/j.envpol.2025.126294

Itzel Y. López-Pacheco , Georgia María González-Meza , Reyna Berenice González-González , Roberto Parra-Saldívar , Elda M. Melchor-Martínez

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Abstract

The microbiological load that wastewater may contain is an important factor to consider in wastewater treatment to avoid water bodies contamination and has taken on great relevance due to the possible presence of antibiotic-resistant bacteria. This study investigates the feasibility of bacteria control by phycoremediation treatment using Scenedesmus sp. in two types of wastewater (domestic and swine wastewater). It was determined the cell growth of microalgae culture, and the reduction of total coliforms and enterobacteria load throughout ten days of experiment. In addition, the removal of antibiotic-resistant bacteria was performed using five different antibiotics commonly used in clinical diagnosis: Ampicillin Tetracycline, Ciprofloxacin, Sulfamethoxazole, and Ceftriaxone. The results shown a significant decrease in total coliforms and enterobacteria in the phycoremediation process, it was removed up to 98 % of total coliforms [ from (8.7 ± 2.31) × 10⁴ to (1.6 ± 0.17) × 10³ CFU mL ⁻¹] in swine wastewater and 99 % in domestic wastewater [(3.6 ± 0.31) × 10⁵ to (2 ± 0.05) × 10³ CFU mL ⁻¹]. Significant reduction in the case of sulfamethoxazole-resistant bacteria by microalgae in swine wastewater from [(1.47 ± 0.05) × 10⁵ to (5.3 ± 0.57) × 10³ ] and domestic wastewater [(4.9 ± 0.15) × 10⁴ to (2.9 ± 0.36) × 10³]. These findings demonstrate the versatility and effectiveness of the phycoremediation system since the general microbial control to most specific of antibiotic-resistant bacteria in wastewater, demonstrating its great potential to reduce the risk of public health issues in urban and rural areas.

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藻类对猪和生活废水的生物修复促进大肠菌群和耐抗生素细菌的减少

废水中可能含有的微生物负荷是废水处理中避免水体污染的一个重要因素，并且由于可能存在耐药细菌而具有很大的相关性。本研究探讨了在两种污水（生活污水和养猪业污水）中应用Scenedesmus sp.进行藻修复控制细菌的可行性。通过10天的实验，测定了微藻培养物的细胞生长情况，以及总大肠菌群和肠杆菌负荷的减少情况。此外，使用临床诊断中常用的五种不同的抗生素：氨苄西林四环素、环丙沙星、磺胺甲恶唑和头孢曲松进行抗生素耐药菌的去除。结果表明，在藻修复过程中，总大肠菌群和肠杆菌的去除率显著降低，猪废水中总大肠菌群去除率高达98%[从（8.7±2.31）× 104降至（1.6±0.17）× 103 CFU mL -1]，生活废水中总大肠菌群去除率高达99%[从（3.6±0.31）× 105降至（2±0.05）× 103 CFU mL -1]。微藻对猪废水中的磺胺甲恶唑耐药菌从（1.47±0.05）× 105降至（5.3±0.57）× 103，对生活废水中的磺胺甲恶唑耐药菌从（4.9±0.15）× 104降至（2.9±0.36）× 103显著降低。这些发现证明了藻修复系统的多功能性和有效性，因为一般微生物控制废水中大多数特定的抗生素耐药细菌，显示了其在减少城市和农村地区公共卫生问题风险方面的巨大潜力。

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来源期刊

Environmental Pollution 环境科学-环境科学

CiteScore

16.00

自引率

6.70%

发文量

2082

审稿时长

2.9 months

期刊介绍： Environmental Pollution is an international peer-reviewed journal that publishes high-quality research papers and review articles covering all aspects of environmental pollution and its impacts on ecosystems and human health. Subject areas include, but are not limited to: • Sources and occurrences of pollutants that are clearly defined and measured in environmental compartments, food and food-related items, and human bodies; • Interlinks between contaminant exposure and biological, ecological, and human health effects, including those of climate change; • Contaminants of emerging concerns (including but not limited to antibiotic resistant microorganisms or genes, microplastics/nanoplastics, electronic wastes, light, and noise) and/or their biological, ecological, or human health effects; • Laboratory and field studies on the remediation/mitigation of environmental pollution via new techniques and with clear links to biological, ecological, or human health effects; • Modeling of pollution processes, patterns, or trends that is of clear environmental and/or human health interest; • New techniques that measure and examine environmental occurrences, transport, behavior, and effects of pollutants within the environment or the laboratory, provided that they can be clearly used to address problems within regional or global environmental compartments.