Faruque Mohammed Omar, Mohammed Tariq, Hossain Mohammad Mozahar, Razzak Shaikh Abdur
Department of Chemical Engineering, King Fahd University of Petroleum and Minerals, 31261, Dhahran, Saudi Arabia.
Department of Civil and Environmental Engineering, King Fahd University of Petroleum and Minerals, 31261, Dhahran, Saudi Arabia.
Environ Monit Assess. 2024 Dec 19;197(1):72. doi: 10.1007/s10661-024-13543-9.
The sustainable treatment of petroleum-derived produced water (PW), a significant byproduct of oil and gas extraction, presents a persistent problem due to the presence of organic pollutants. This study examines the potential of the microalga Chlorella sorokiniana (C. sorokiniana) for the bioremediation of dissolved organic pollutants in PW. The primary objectives were to evaluate the efficacy of C. sorokiniana in decreasing the levels of dissolved organic contaminants while examining its growth and survival in such a complex environment. The cultivation of C. sorokiniana in photobioreactors containing synthetic produced water (SPW), supplemented with synthetic municipal wastewater (SMW) to provide essential nutrients, was carried out under controlled laboratory conditions. Parameters such as biomass growth, lipid content, and the microalgae's capacity to metabolize organic compounds are monitored over time. The results indicate that, except for 100% PW, maximum biomass output after 16 days ranged from 733 to 1077 mg/L. Total organic carbon (TOC) removal efficiency increased with rising PW concentrations, peaking at 85% for 50% PW. The cultivation period resulted in substantial nitrogen and phosphorus removal from the enriched PW media, achieving a maximum nitrogen removal of 87% at 10% PW and a phosphorus removal of 98.5% at 40% PW. Lipid content ranged from 12 to 16% during this period. In conclusion, C. sorokiniana offers a promising and sustainable approach for the bioremediation of dissolved organic compounds in PW. This method provides an eco-friendly option to reduce the ecological impact associated with petroleum-derived PW.
石油开采过程中产生的大量副产品——采出水（PW），因其含有有机污染物，对其进行可持续处理一直是个难题。本研究探讨了小球藻（Chlorella sorokiniana，简称C. sorokiniana）对采出水中溶解有机污染物进行生物修复的潜力。主要目标是评估C. sorokiniana在降低溶解有机污染物水平方面的效果，同时考察其在这种复杂环境中的生长和存活情况。在实验室控制条件下，将C. sorokiniana培养于装有合成采出水（SPW）的光生物反应器中，并添加合成城市污水（SMW）以提供必需营养物质。随着时间推移，监测生物量增长、脂质含量以及微藻代谢有机化合物的能力等参数。结果表明，除了100%采出水外，16天后的最大生物量产量在733至1077 mg/L之间。总有机碳（TOC）去除效率随采出水浓度升高而增加，在50%采出水时达到峰值85%。培养期使得富营养化采出水介质中的氮和磷大量去除，在10%采出水时最大氮去除率达到87%，在40%采出水时磷去除率达到98.5%。在此期间，脂质含量在12%至16%之间。总之，C. sorokiniana为采出水中溶解有机化合物的生物修复提供了一种有前景的可持续方法。该方法为减少与石油衍生采出水相关的生态影响提供了一种生态友好的选择。
