Enhanced treatment of fracturing flowback fluids using bioflocculant-modified fly ash cenospheres: Process optimization and mechanism analysis

IF 7.8 2区环境科学与生态学 Q1 ENGINEERING, CHEMICAL

Process Safety and Environmental Protection Pub Date : 2025-09-26 DOI:10.1016/j.psep.2025.107938

Juan Sun , Wenhui Zhang , Shuixiang Xie , Shuangxin Shi , Ziwei Du , Fang Liu , Qiyou Liu , Chunshuang Liu

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引用次数: 0

Abstract

Hydraulic fracturing produces complex organic wastewater, known as fracturing flowback fluid (FFF), which contains refractory pollutants and poses risks of secondary contamination, thereby challenging conventional treatment methods. This study developed an environmentally sustainable strategy using a microbial flocculant (MBF) synthesized from Bacillus paramycoides YQ1—a strain isolated from FFF—in combination with candelilla wax- modified fly ash cenospheres (CWFACs). Through process optimization, the MBF yield was increased from 4.38 to 5.78 g·L⁻¹ , and its flocculation efficiency improved from 60.06 % to 87.84 %. Under optimal conditions, MBF alone achieved removal rates of 86.67 % for chroma, 81.98 % for suspended solids (SS) removal, and 65.13 % for oil, along with effective degradation of polycyclic aromatic hydrocarbons (PAHs). The integrated MBF-CWFACs system demonstrated enhanced performance, attaining 88.50 % chroma removal, 96.29 % SS removal, and 95.30 % oil removal. Mechanistic analysis revealed synergistic effects between bioflocculation and adsorption processes. This integrated approach offers a sustainable solution for FFF treatment, addressing both process efficiency and environmental safety concerns, providing insights for developing eco-friendly wastewater treatment technologies in the petroleum industry.

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生物絮凝剂改性粉煤灰微球强化处理压裂返排液：工艺优化与机理分析

水力压裂产生复杂的有机废水，称为压裂返排液（FFF），其中含有难降解污染物，具有二次污染的风险，因此对传统的处理方法提出了挑战。本研究利用从fff分离的副芽孢杆菌yq1合成的微生物絮凝剂（MBF）与小蜡烛蜡改性粉煤灰微球（CWFACs）结合，开发了一种环境可持续发展的策略。通过工艺优化，MBF产率由4.38提高到5.78 g·L⁻¹ ，絮凝效率由60.06 %提高到87.84 %。在最佳条件下，MBF对色度的去除率为86.67 %，对悬浮物（SS）的去除率为81.98 %，对油脂的去除率为65.13 %，并对多环芳烃（PAHs）进行了有效的降解。集成MBF-CWFACs系统的性能得到了增强，色度去除率达到88.50% %，SS去除率为96.29% %，油去除率为95.30% %。机理分析揭示了生物絮凝和吸附过程之间的协同效应。这种综合方法为FFF处理提供了可持续的解决方案，既解决了处理效率问题，又解决了环境安全问题，为石油行业开发环保型废水处理技术提供了见解。

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来源期刊

Process Safety and Environmental Protection 环境科学-工程：化工

CiteScore

11.40

自引率

15.40%

发文量

929

审稿时长

8.0 months

期刊介绍： The Process Safety and Environmental Protection (PSEP) journal is a leading international publication that focuses on the publication of high-quality, original research papers in the field of engineering, specifically those related to the safety of industrial processes and environmental protection. The journal encourages submissions that present new developments in safety and environmental aspects, particularly those that show how research findings can be applied in process engineering design and practice. PSEP is particularly interested in research that brings fresh perspectives to established engineering principles, identifies unsolved problems, or suggests directions for future research. The journal also values contributions that push the boundaries of traditional engineering and welcomes multidisciplinary papers. PSEP's articles are abstracted and indexed by a range of databases and services, which helps to ensure that the journal's research is accessible and recognized in the academic and professional communities. These databases include ANTE, Chemical Abstracts, Chemical Hazards in Industry, Current Contents, Elsevier Engineering Information database, Pascal Francis, Web of Science, Scopus, Engineering Information Database EnCompass LIT (Elsevier), and INSPEC. This wide coverage facilitates the dissemination of the journal's content to a global audience interested in process safety and environmental engineering.