Study of Initial Adhesion of a Bacterium to Different Support Materials before and after Conditioning Film of Olive Oil-Mill Wastewater

• 作者: Abdeslam Jaafari Hafida Zahir Hassan Latrache Mohamed El Amine Afilal Mostafa Ellouali Safae Tankiouine Souad Lekchiri Taoufik Hakim
• 来源期刊: 生命科学与技术进展(英文)
• 学科: 数学
• 关键词: Conditioning Film Initial Adhesion Olive Oil-Mill Wastewater Physicochemical Properties
• 年，卷（期）: 2020,（8）
• 页码范围: 391-404
• 页数: 14页
• 分类号: O17

摘要

To improve the start-up speed and efficiency of bioreactors, biofilm technology is sometimes used. This technology uses various types of materials to facilitate the adhesion of microorganisms. In this study, the surface characteris<span style="font-family:Verdana;">tics of inert substrates and substrates after olive oil-mill wastewater (OMWW)</span><span style="font-family:Verdana;"> conditioning film were evaluated to understand the impact of OMWW on adhesion as well as the most suitable material to optimize bacterial adhesion. Three common substrates made of different polymers were tested for bacterial adhesion before and after treatment with OMWW: PP (polypropylene), PET (Polyethylene terephthalate), and PVC (polyvinyl chloride). The </span><span style="font-family:Verdana;">surfaces’ physicochemical characteristics were studied by measuring the contact angle for the studied bacteria strain and the supports, before and after treatment with OMWW. Results of initial adhesion tests for untreated and treated supports showed differences in how bacterial cells adhered to substrates. Before treatment with OMWW, PVC and then PP showed a significant adhesion capacity, double that of PET [PVC: 1.58</span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">× 10</span>^{<span style="font-family:Verdana;">5</span>}<span style="font-family:Verdana;"> CFU/cm</span>^{<span style="font-family:Verdana;">2</span>}<span style="font-family:Verdana;">, PP: 1.48</span></span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">× 10</span>^{<span style="font-family:Verdana;">5</span>}<span style="font-family:Verdana;"> CFU/cm</span>^{<span style="font-family:Verdana;">2</span>}<span style="font-family:Verdana;"> and PET: 0.72</span></span><span style="font-family:;" "=""> </span><span style="font-family:;" "=""><span style="font-family:Verdana;">× 10</span><sup><span style="font-family: