Presented to

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This is to certify that your paper entitled «Effect of process variables on oil removal from water in packed bed with nonwoven polimeric fibers» was indexed with 8 pages, in the CIVILICA citation database, code COI:OILBCNF05_028, after evaluation and approval of the referees of the "Fifth International Conference on Technology Development in Oil, Gas, Refining and Petrochemicals held in Tehran 2021.

While offering our congratulations on the indexation of your paper, please be informed that this certificate is prepared based on the information submitted by the secretariat of the above conference and the information contained in the CIVILICA database, and the accuracy of its content can be inquired at any time through link provided at the bottom of the page or scanning the code image.