https://www.orapuh.org/ojs/ojs-3.1.2-4/index.php/orapj/issue/feed 2026-01-25T13:58:54+02:00 Prof VE Adamu [email protected] Open Journal Systems <p><strong>ENGLISH (ANGLAIS)</strong></p> <p>Orapuh Journal (Orap J) is an open-access, internationally peer-reviewed online journal dedicated to oral and public health. The journal provides accessible, high-quality, peer-reviewed knowledge to oral and public health professionals, educators, consumers, and the global community.</p> <p><strong>Aim</strong><br>Orapuh Journal aims to enhance access to superior information and research in oral and public health while fostering the development of emerging researchers and authors, particularly from underserved areas within these disciplines.</p> <p><strong>Scope</strong><br>Orapuh Journal prioritises:</p> <p>1. Original research<br>2. Comprehensive and critical review articles<br>3. Evidence-based information<br>4. Interactive clinical and related content<br>5. Content contributions focused on advancing oral and public health disciplines.</p> <p><strong>Open Access Information</strong></p> <p>All articles in Orap J are open-access articles distributed under the terms of the Creative Commons Attribution Non-Commercial 4.0 International License.</p> <p>Click <a href="https://www.orapuh.org/ojs/ojs-3.1.2-4/index.php/orapj/about"><strong>here</strong></a> to read more about the Journal. Find out <a href="http://orapuh.org/ojs/ojs-3.1.2-4/index.php/orapj/why-choose">why <em>Orap J</em> is your quick access to being</a>!</p> <p><strong><a href="https://orapuh.org/the-vital-role-of-communicating-dental-and-public-health-research-findings/">Click here</a></strong>&nbsp;to read an article about the vital role of communicating oral and public health research findings to the scientific community.</p> <p><a href="http://orapuh.org/ojs/ojs-3.1.2-4/index.php/orapj/editorial-policies">Editorial Policies</a>&nbsp; | <a href="https://orapuh.org/ojs/ojs-3.1.2-4/index.php/orapj/about/editorialTeam">Editorial Team</a> | <a href="http://orapuh.org/ojs/ojs-3.1.2-4/index.php/orapj/about/submissions">Author Guidelines</a></p> <p>_________________________________________________________</p> <p>&nbsp;</p> <p><strong>FRENCH (FRANÇAIS)</strong></p> <p>Orapuh Journal (Orap J) est une revue en ligne internationale, en libre accès et évaluée par des pairs, consacrée à la santé bucco-dentaire et à la santé publique. La revue fournit des connaissances accessibles, de haute qualité et évaluées par des pairs aux professionnels, aux éducateurs, aux consommateurs et à la communauté mondiale de la santé bucco-dentaire et de la santé publique.</p> <p><strong>Objectif</strong><br>Orapuh Journal vise à améliorer l’accès à une information et à une recherche de qualité supérieure en santé bucco-dentaire et en santé publique, tout en favorisant le développement de nouveaux chercheurs et auteurs, en particulier ceux issus de zones défavorisées dans ces disciplines.</p> <p><strong>Portée</strong><br>Orapuh Journal privilégie :</p> <p>1. Les recherches originales<br>2. Les articles de synthèse complets et critiques<br>3. Les informations fondées sur des données probantes<br>4. Les contenus cliniques interactifs et connexes<br>5. Les contributions visant à faire progresser les disciplines de la santé bucco-dentaire et de la santé publique.</p> <p><strong>Information sur le libre accès</strong></p> <p>Tous les articles d’Orap J sont en libre accès et distribués conformément aux termes de la licence Creative Commons Attribution – Non Commercial 4.0 International.</p> <p>Cliquez <a href="https://www.orapuh.org/ojs/ojs-3.1.2-4/index.php/orapj/about">ici</a> pour en savoir plus sur la revue. Découvrez <a href="http://orapuh.org/ojs/ojs-3.1.2-4/index.php/orapj/why-choose">pourquoi Orap J est votre accès rapide à l’existence</a>!</p> <p><a href="https://orapuh.org/the-vital-role-of-communicating-dental-and-public-health-research-findings/">Cliquez ici</a> pour lire un article sur le rôle essentiel de la communication des résultats de recherche en santé bucco-dentaire et en santé publique à la communauté scientifique.</p> <p><a href="http://orapuh.org/ojs/ojs-3.1.2-4/index.php/orapj/editorial-policies">Politiques éditoriales</a> | <a href="https://orapuh.org/ojs/ojs-3.1.2-4/index.php/orapj/about/editorialTeam">Équipe éditoriale</a> | <a href="http://orapuh.org/ojs/ojs-3.1.2-4/index.php/orapj/about/submissions">Directives aux auteurs</a></p> https://www.orapuh.org/ojs/ojs-3.1.2-4/index.php/orapj/article/view/e1411 2026-01-25T13:58:54+02:00 Lialia Credo Mesongolo [email protected] Musibono Eyul’anki Dieudonné [email protected] Tangou Thierry Tabou [email protected] Mulaji Crispin Kyela [email protected] MAX SEKE VA [email protected] Biey Makaly Emmanuel [email protected]

<p><strong>Introduction</strong></p> <p>Hospital effluents often contain heavy metals that pose significant environmental and public health risks, particularly in settings with limited access to advanced wastewater treatment technologies. Upflow Anaerobic Sludge Blanket (UASB) reactors represent a low-cost alternative; however, pilot-scale data on heavy metal removal remain scarce.</p> <p><strong>Purpos</strong><strong>e </strong></p> <p>This study evaluated the performance of a pilot-scale UASB reactor for heavy metal removal under optimised and non-optimised operational conditions and identified key factors influencing treatment efficiency.</p> <p><strong>Methods&nbsp; </strong></p> <p>A Plackett–Burman experimental design was used to screen critical operational parameters. The UASB reactor was operated for 12 weeks using real hospital effluent collected from the University Clinics of Kinshasa, with 36 samples analysed per monitoring point. The optimised reactor (P14) incorporated natural additives, including clay, eggshells, maize, and lime. Heavy metal concentrations were determined using atomic absorption spectrophotometry (AAS), with quality assurance and quality control procedures, calibration standards, and analytical blanks applied throughout.</p> <p><strong>Results </strong></p> <p>Under optimised conditions, substantial reductions were observed in chemical oxygen demand (COD; 620 → 150 mg/L) and heavy metal concentrations: iron (1.20 → 0.45 mg/L), copper (0.85 → 0.30 mg/L), and zinc (0.60 → 0.22 mg/L), corresponding to removal efficiencies of approximately 60–70%. Nickel and manganese concentrations also decreased but remained above World Health Organization guideline limits. Reactor performance remained stable throughout the 12-week operational period.</p> <p><strong>Conclusion</strong></p> <p>Pilot-scale UASB reactors supplemented with natural additives can significantly enhance heavy metal removal from hospital effluents. Further research is required to assess long-term operational stability, heavy metal fate, sludge management, and scalability prior to full-scale implementation.</p>

2026-01-25T13:58:06+02:00 Copyright (c) 2026 Lialia Credo Mesongolo, Musibono Eyul’anki Dieudonné, Tangou Thierry Tabou , Mulaji Crispin Kyela , MAX SEKE VA, Biey Makaly Emmanuel