A Novel Halophilic Bacterium for Sustainable Pollution Control: From Pesticides to Industrial Effluents

作者：Nadia Mihoubi, Samira Ferhat, Mohamed Nedjhioui, Billal Zenati, Sabrina Lekmine, Reguia Boudraa, Mohammad Shamsul Ola, Jie Zhang, Abdeltif Amrane, Hichem Tahraoui · 发表于：Water · 年份：2025 · DOI：10.3390/w17060888 · 被引用次数：11 · 研究领域：Pharmaceutical and Antibiotic Environmental Impacts、Microbial Community Ecology and Physiology、Enzyme-mediated dye degradation

This study investigates the bioremediation potential of Marinobacter-hydrocarbonoclasticus SDK644, a strain that has been isolated from petroleum-contaminated environments, for the degradation of the herbicide metribuzin and the treatment of slaughterhouse effluent. The strain’s bacterial growth and degradation capacity were assessed under varying conditions, including different metribuzin concentrations, pH values, temperatures, and inoculum sizes. The strain demonstrated optimal growth at a metribuzin concentration of 20 mg/L, with an optical density (OD600) of 0.408 after 96 h. At this concentration, 80% of the chemical oxygen demand (COD) was reduced over 144 h. The optimal growth conditions for M. hydrocarbonoclasticus SDK644 were identified as a pH of 7 and a temperature of 30 °C, where the enzymatic activity and degradation efficiency were maximized. Additionally, the treatment of slaughterhouse effluent showed significant reductions in organic pollution, with the COD and biochemical oxygen demand (BOD5) decreasing by 80% (from 1900 mg/L to 384 mg/L) and 81% (from 1700 mg/L to 320 mg/L), respectively, within seven days. The strain also facilitated ammonium removal and promoted nitrification, indicating its suitability for treating high-organic-load wastewater. Notably, the visual transformation of the effluent, from a dark red color to a clear state, further highlighted the efficiency of the treatment process. This research highlights the adaptability of M. hydrocarbon...