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This is to certify that your paper entitled «Effect of hydraulic retention time (HRT) in an anaerobic baffled reactor (ABR) on the reduction of BOD and COD in slaughterhouse industrial wastewater» was indexed with 12 pages, in the CIVILICA citation database, code COI:JR_AET-11-1_001, after evaluation and approval of the referees of the "Advances in Environmental Technology Vol 11, Issue 1 , Year 2024.

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 journal 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.